diff --git a/api/client/BUILD.bazel b/api/client/BUILD.bazel
index f5ddc9bb6c81..f29007f35ae9 100644
--- a/api/client/BUILD.bazel
+++ b/api/client/BUILD.bazel
@@ -9,7 +9,10 @@ go_library(
     ],
     importpath = "github.com/OffchainLabs/prysm/v6/api/client",
     visibility = ["//visibility:public"],
-    deps = ["@com_github_pkg_errors//:go_default_library"],
+    deps = [
+        "//api:go_default_library",
+        "@com_github_pkg_errors//:go_default_library",
+    ],
 )
 
 go_test(
diff --git a/api/client/beacon/BUILD.bazel b/api/client/beacon/BUILD.bazel
index 0013c9d4530e..0f4d08a581a0 100644
--- a/api/client/beacon/BUILD.bazel
+++ b/api/client/beacon/BUILD.bazel
@@ -11,6 +11,7 @@ go_library(
     importpath = "github.com/OffchainLabs/prysm/v6/api/client/beacon",
     visibility = ["//visibility:public"],
     deps = [
+        "//api:go_default_library",
         "//api/client:go_default_library",
         "//api/server:go_default_library",
         "//api/server/structs:go_default_library",
diff --git a/api/client/beacon/client.go b/api/client/beacon/client.go
index e5ec0ea24320..ab0f6a96dcfa 100644
--- a/api/client/beacon/client.go
+++ b/api/client/beacon/client.go
@@ -11,6 +11,7 @@ import (
 	"regexp"
 	"strconv"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/api/client"
 	"github.com/OffchainLabs/prysm/v6/api/server"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
@@ -273,7 +274,7 @@ func (c *Client) SubmitChangeBLStoExecution(ctx context.Context, request []*stru
 	if err != nil {
 		return errors.Wrap(err, "invalid format, failed to create new POST request object")
 	}
-	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set(api.ContentTypeHeader, api.JsonMediaType)
 	resp, err := c.Do(req)
 	if err != nil {
 		return err
diff --git a/api/client/builder/client.go b/api/client/builder/client.go
index f1ad36221d72..b1723bf7dc91 100644
--- a/api/client/builder/client.go
+++ b/api/client/builder/client.go
@@ -171,7 +171,7 @@ func (c *Client) do(ctx context.Context, method string, path string, body io.Rea
 	if err != nil {
 		return
 	}
-	req.Header.Add("User-Agent", version.BuildData())
+	req.Header.Add(api.UserAgentHeader, version.BuildData())
 	for _, o := range opts {
 		o(req)
 	}
@@ -232,11 +232,11 @@ func (c *Client) GetHeader(ctx context.Context, slot primitives.Slot, parentHash
 	var getOpts reqOption
 	if c.sszEnabled {
 		getOpts = func(r *http.Request) {
-			r.Header.Set("Accept", api.OctetStreamMediaType)
+			r.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		}
 	} else {
 		getOpts = func(r *http.Request) {
-			r.Header.Set("Accept", api.JsonMediaType)
+			r.Header.Set(api.AcceptHeader, api.JsonMediaType)
 		}
 	}
 	data, header, err := c.do(ctx, http.MethodGet, path, nil, http.StatusOK, getOpts)
@@ -259,8 +259,8 @@ func (c *Client) GetHeader(ctx context.Context, slot primitives.Slot, parentHash
 
 func (c *Client) parseHeaderResponse(data []byte, header http.Header, slot primitives.Slot) (SignedBid, error) {
 	var versionHeader string
-	if c.sszEnabled || header.Get(api.VersionHeader) != "" {
-		versionHeader = header.Get(api.VersionHeader)
+	if c.sszEnabled || header.Get(api.EthConsensusVersionHeader) != "" {
+		versionHeader = header.Get(api.EthConsensusVersionHeader)
 	} else {
 		// If we don't have a version header, attempt to parse JSON for version
 		v := &VersionResponse{}
@@ -390,8 +390,8 @@ func (c *Client) RegisterValidator(ctx context.Context, svr []*ethpb.SignedValid
 	)
 	if c.sszEnabled {
 		postOpts = func(r *http.Request) {
-			r.Header.Set("Content-Type", api.OctetStreamMediaType)
-			r.Header.Set("Accept", api.OctetStreamMediaType)
+			r.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+			r.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		}
 		body, err = sszValidatorRegisterRequest(svr)
 		if err != nil {
@@ -401,8 +401,8 @@ func (c *Client) RegisterValidator(ctx context.Context, svr []*ethpb.SignedValid
 		}
 	} else {
 		postOpts = func(r *http.Request) {
-			r.Header.Set("Content-Type", api.JsonMediaType)
-			r.Header.Set("Accept", api.JsonMediaType)
+			r.Header.Set(api.ContentTypeHeader, api.JsonMediaType)
+			r.Header.Set(api.AcceptHeader, api.JsonMediaType)
 		}
 		body, err = jsonValidatorRegisterRequest(svr)
 		if err != nil {
@@ -446,7 +446,7 @@ func sszValidatorRegisterRequest(svr []*ethpb.SignedValidatorRegistrationV1) ([]
 	return ssz, nil
 }
 
-var errResponseVersionMismatch = errors.New("builder API response uses a different version than requested in " + api.VersionHeader + " header")
+var errResponseVersionMismatch = errors.New("builder API response uses a different version than requested in " + api.EthConsensusVersionHeader + " header")
 
 func getVersionsBlockToPayload(blockVersion int) (int, error) {
 	if blockVersion >= version.Fulu {
@@ -525,7 +525,7 @@ func (c *Client) SubmitBlindedBlockPostFulu(ctx context.Context, sb interfaces.R
 func (c *Client) checkBlockVersion(respBytes []byte, header http.Header) (int, error) {
 	var versionHeader string
 	if c.sszEnabled {
-		versionHeader = strings.ToLower(header.Get(api.VersionHeader))
+		versionHeader = strings.ToLower(header.Get(api.EthConsensusVersionHeader))
 	} else {
 		// fallback to JSON-based version extraction
 		v := &VersionResponse{}
@@ -555,9 +555,9 @@ func (c *Client) buildBlindedBlockRequest(sb interfaces.ReadOnlySignedBeaconBloc
 			return nil, nil, errors.Wrap(err, "could not marshal SSZ for blinded block")
 		}
 		opt := func(r *http.Request) {
-			r.Header.Set(api.VersionHeader, version.String(sb.Version()))
-			r.Header.Set("Content-Type", api.OctetStreamMediaType)
-			r.Header.Set("Accept", api.OctetStreamMediaType)
+			r.Header.Set(api.EthConsensusVersionHeader, version.String(sb.Version()))
+			r.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+			r.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		}
 		return body, opt, nil
 	}
@@ -571,9 +571,9 @@ func (c *Client) buildBlindedBlockRequest(sb interfaces.ReadOnlySignedBeaconBloc
 		return nil, nil, errors.Wrap(err, "error marshaling blinded block to JSON")
 	}
 	opt := func(r *http.Request) {
-		r.Header.Set(api.VersionHeader, version.String(sb.Version()))
-		r.Header.Set("Content-Type", api.JsonMediaType)
-		r.Header.Set("Accept", api.JsonMediaType)
+		r.Header.Set(api.EthConsensusVersionHeader, version.String(sb.Version()))
+		r.Header.Set(api.ContentTypeHeader, api.JsonMediaType)
+		r.Header.Set(api.AcceptHeader, api.JsonMediaType)
 	}
 	return body, opt, nil
 }
@@ -676,7 +676,7 @@ func (c *Client) parseBlindedBlockResponseJSON(
 // happy path, and an error with information about the server response body for a non-200 response.
 func (c *Client) Status(ctx context.Context) error {
 	getOpts := func(r *http.Request) {
-		r.Header.Set("Accept", api.JsonMediaType)
+		r.Header.Set(api.AcceptHeader, api.JsonMediaType)
 	}
 	_, _, err := c.do(ctx, http.MethodGet, getStatus, nil, http.StatusOK, getOpts)
 	return err
diff --git a/api/client/builder/client_test.go b/api/client/builder/client_test.go
index 13f3d65483d7..0926bd48950b 100644
--- a/api/client/builder/client_test.go
+++ b/api/client/builder/client_test.go
@@ -12,7 +12,6 @@ import (
 
 	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
-	"github.com/OffchainLabs/prysm/v6/testing/util"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
@@ -22,6 +21,7 @@ import (
 	eth "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
+	"github.com/OffchainLabs/prysm/v6/testing/util"
 	"github.com/prysmaticlabs/go-bitfield"
 	log "github.com/sirupsen/logrus"
 )
@@ -92,8 +92,8 @@ func TestClient_RegisterValidator(t *testing.T) {
 	t.Run("JSON success", func(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
-				require.Equal(t, api.JsonMediaType, r.Header.Get("Content-Type"))
-				require.Equal(t, api.JsonMediaType, r.Header.Get("Accept"))
+				require.Equal(t, api.JsonMediaType, r.Header.Get(api.ContentTypeHeader))
+				require.Equal(t, api.JsonMediaType, r.Header.Get(api.AcceptHeader))
 				body, err := io.ReadAll(r.Body)
 				defer func() {
 					require.NoError(t, r.Body.Close())
@@ -127,8 +127,8 @@ func TestClient_RegisterValidator(t *testing.T) {
 	t.Run("SSZ success", func(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
-				require.Equal(t, api.OctetStreamMediaType, r.Header.Get("Content-Type"))
-				require.Equal(t, api.OctetStreamMediaType, r.Header.Get("Accept"))
+				require.Equal(t, api.OctetStreamMediaType, r.Header.Get(api.ContentTypeHeader))
+				require.Equal(t, api.OctetStreamMediaType, r.Header.Get(api.AcceptHeader))
 				body, err := io.ReadAll(r.Body)
 				defer func() {
 					require.NoError(t, r.Body.Close())
@@ -225,7 +225,7 @@ func TestClient_GetHeader(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
 				require.Equal(t, expectedPath, r.URL.Path)
-				require.Equal(t, api.JsonMediaType, r.Header.Get("Accept"))
+				require.Equal(t, api.JsonMediaType, r.Header.Get(api.AcceptHeader))
 				return &http.Response{
 					StatusCode: http.StatusOK,
 					Body:       io.NopCloser(bytes.NewBufferString(testExampleHeaderResponse)),
@@ -260,7 +260,7 @@ func TestClient_GetHeader(t *testing.T) {
 	t.Run("bellatrix ssz", func(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
-				require.Equal(t, api.OctetStreamMediaType, r.Header.Get("Accept"))
+				require.Equal(t, api.OctetStreamMediaType, r.Header.Get(api.AcceptHeader))
 				require.Equal(t, expectedPath, r.URL.Path)
 				epr := &ExecHeaderResponse{}
 				require.NoError(t, json.Unmarshal([]byte(testExampleHeaderResponse), epr))
@@ -269,7 +269,7 @@ func TestClient_GetHeader(t *testing.T) {
 				ssz, err := pro.MarshalSSZ()
 				require.NoError(t, err)
 				header := http.Header{}
-				header.Set(api.VersionHeader, "bellatrix")
+				header.Set(api.EthConsensusVersionHeader, "bellatrix")
 				return &http.Response{
 					StatusCode: http.StatusOK,
 					Header:     header,
@@ -306,7 +306,7 @@ func TestClient_GetHeader(t *testing.T) {
 	t.Run("capella", func(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
-				require.Equal(t, api.JsonMediaType, r.Header.Get("Accept"))
+				require.Equal(t, api.JsonMediaType, r.Header.Get(api.AcceptHeader))
 				require.Equal(t, expectedPath, r.URL.Path)
 				return &http.Response{
 					StatusCode: http.StatusOK,
@@ -338,7 +338,7 @@ func TestClient_GetHeader(t *testing.T) {
 	t.Run("capella ssz", func(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
-				require.Equal(t, api.OctetStreamMediaType, r.Header.Get("Accept"))
+				require.Equal(t, api.OctetStreamMediaType, r.Header.Get(api.AcceptHeader))
 				require.Equal(t, expectedPath, r.URL.Path)
 				epr := &ExecHeaderResponseCapella{}
 				require.NoError(t, json.Unmarshal([]byte(testExampleHeaderResponseCapella), epr))
@@ -347,7 +347,7 @@ func TestClient_GetHeader(t *testing.T) {
 				ssz, err := pro.MarshalSSZ()
 				require.NoError(t, err)
 				header := http.Header{}
-				header.Set(api.VersionHeader, "capella")
+				header.Set(api.EthConsensusVersionHeader, "capella")
 				return &http.Response{
 					StatusCode: http.StatusOK,
 					Header:     header,
@@ -380,7 +380,7 @@ func TestClient_GetHeader(t *testing.T) {
 	t.Run("deneb", func(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
-				require.Equal(t, api.JsonMediaType, r.Header.Get("Accept"))
+				require.Equal(t, api.JsonMediaType, r.Header.Get(api.AcceptHeader))
 				require.Equal(t, expectedPath, r.URL.Path)
 				return &http.Response{
 					StatusCode: http.StatusOK,
@@ -420,7 +420,7 @@ func TestClient_GetHeader(t *testing.T) {
 	t.Run("deneb ssz", func(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
-				require.Equal(t, api.OctetStreamMediaType, r.Header.Get("Accept"))
+				require.Equal(t, api.OctetStreamMediaType, r.Header.Get(api.AcceptHeader))
 				require.Equal(t, expectedPath, r.URL.Path)
 				epr := &ExecHeaderResponseDeneb{}
 				require.NoError(t, json.Unmarshal([]byte(testExampleHeaderResponseDeneb), epr))
@@ -429,7 +429,7 @@ func TestClient_GetHeader(t *testing.T) {
 				ssz, err := pro.MarshalSSZ()
 				require.NoError(t, err)
 				header := http.Header{}
-				header.Set(api.VersionHeader, "deneb")
+				header.Set(api.EthConsensusVersionHeader, "deneb")
 				return &http.Response{
 					StatusCode: http.StatusOK,
 					Header:     header,
@@ -488,7 +488,7 @@ func TestClient_GetHeader(t *testing.T) {
 	t.Run("electra", func(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
-				require.Equal(t, api.JsonMediaType, r.Header.Get("Accept"))
+				require.Equal(t, api.JsonMediaType, r.Header.Get(api.AcceptHeader))
 				require.Equal(t, expectedPath, r.URL.Path)
 				return &http.Response{
 					StatusCode: http.StatusOK,
@@ -533,7 +533,7 @@ func TestClient_GetHeader(t *testing.T) {
 	t.Run("electra ssz", func(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
-				require.Equal(t, api.OctetStreamMediaType, r.Header.Get("Accept"))
+				require.Equal(t, api.OctetStreamMediaType, r.Header.Get(api.AcceptHeader))
 				require.Equal(t, expectedPath, r.URL.Path)
 				epr := &ExecHeaderResponseElectra{}
 				require.NoError(t, json.Unmarshal([]byte(testExampleHeaderResponseElectra), epr))
@@ -542,7 +542,7 @@ func TestClient_GetHeader(t *testing.T) {
 				ssz, err := pro.MarshalSSZ()
 				require.NoError(t, err)
 				header := http.Header{}
-				header.Set(api.VersionHeader, "electra")
+				header.Set(api.EthConsensusVersionHeader, "electra")
 				return &http.Response{
 					StatusCode: http.StatusOK,
 					Header:     header,
@@ -612,9 +612,9 @@ func TestSubmitBlindedBlock(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
 				require.Equal(t, postBlindedBeaconBlockPath, r.URL.Path)
-				require.Equal(t, "bellatrix", r.Header.Get("Eth-Consensus-Version"))
-				require.Equal(t, api.JsonMediaType, r.Header.Get("Content-Type"))
-				require.Equal(t, api.JsonMediaType, r.Header.Get("Accept"))
+				require.Equal(t, "bellatrix", r.Header.Get(api.EthConsensusVersionHeader))
+				require.Equal(t, api.JsonMediaType, r.Header.Get(api.ContentTypeHeader))
+				require.Equal(t, api.JsonMediaType, r.Header.Get(api.AcceptHeader))
 				return &http.Response{
 					StatusCode: http.StatusOK,
 					Body:       io.NopCloser(bytes.NewBufferString(testExampleExecutionPayload)),
@@ -640,9 +640,9 @@ func TestSubmitBlindedBlock(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
 				require.Equal(t, postBlindedBeaconBlockPath, r.URL.Path)
-				require.Equal(t, "bellatrix", r.Header.Get(api.VersionHeader))
-				require.Equal(t, api.OctetStreamMediaType, r.Header.Get("Content-Type"))
-				require.Equal(t, api.OctetStreamMediaType, r.Header.Get("Accept"))
+				require.Equal(t, "bellatrix", r.Header.Get(api.EthConsensusVersionHeader))
+				require.Equal(t, api.OctetStreamMediaType, r.Header.Get(api.ContentTypeHeader))
+				require.Equal(t, api.OctetStreamMediaType, r.Header.Get(api.AcceptHeader))
 				epr := &ExecutionPayloadResponse{}
 				require.NoError(t, json.Unmarshal([]byte(testExampleExecutionPayload), epr))
 				ep := &structs.ExecutionPayload{}
@@ -652,7 +652,7 @@ func TestSubmitBlindedBlock(t *testing.T) {
 				ssz, err := pro.MarshalSSZ()
 				require.NoError(t, err)
 				header := http.Header{}
-				header.Set(api.VersionHeader, "bellatrix")
+				header.Set(api.EthConsensusVersionHeader, "bellatrix")
 				return &http.Response{
 					StatusCode: http.StatusOK,
 					Header:     header,
@@ -680,9 +680,9 @@ func TestSubmitBlindedBlock(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
 				require.Equal(t, postBlindedBeaconBlockPath, r.URL.Path)
-				require.Equal(t, "capella", r.Header.Get(api.VersionHeader))
-				require.Equal(t, api.JsonMediaType, r.Header.Get("Content-Type"))
-				require.Equal(t, api.JsonMediaType, r.Header.Get("Accept"))
+				require.Equal(t, "capella", r.Header.Get(api.EthConsensusVersionHeader))
+				require.Equal(t, api.JsonMediaType, r.Header.Get(api.ContentTypeHeader))
+				require.Equal(t, api.JsonMediaType, r.Header.Get(api.AcceptHeader))
 				return &http.Response{
 					StatusCode: http.StatusOK,
 					Body:       io.NopCloser(bytes.NewBufferString(testExampleExecutionPayloadCapella)),
@@ -710,9 +710,9 @@ func TestSubmitBlindedBlock(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
 				require.Equal(t, postBlindedBeaconBlockPath, r.URL.Path)
-				require.Equal(t, "capella", r.Header.Get(api.VersionHeader))
-				require.Equal(t, api.OctetStreamMediaType, r.Header.Get("Content-Type"))
-				require.Equal(t, api.OctetStreamMediaType, r.Header.Get("Accept"))
+				require.Equal(t, "capella", r.Header.Get(api.EthConsensusVersionHeader))
+				require.Equal(t, api.OctetStreamMediaType, r.Header.Get(api.ContentTypeHeader))
+				require.Equal(t, api.OctetStreamMediaType, r.Header.Get(api.AcceptHeader))
 				epr := &ExecutionPayloadResponse{}
 				require.NoError(t, json.Unmarshal([]byte(testExampleExecutionPayloadCapella), epr))
 				ep := &structs.ExecutionPayloadCapella{}
@@ -722,7 +722,7 @@ func TestSubmitBlindedBlock(t *testing.T) {
 				ssz, err := pro.MarshalSSZ()
 				require.NoError(t, err)
 				header := http.Header{}
-				header.Set(api.VersionHeader, "capella")
+				header.Set(api.EthConsensusVersionHeader, "capella")
 				return &http.Response{
 					StatusCode: http.StatusOK,
 					Header:     header,
@@ -753,9 +753,9 @@ func TestSubmitBlindedBlock(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
 				require.Equal(t, postBlindedBeaconBlockPath, r.URL.Path)
-				require.Equal(t, "deneb", r.Header.Get(api.VersionHeader))
-				require.Equal(t, api.JsonMediaType, r.Header.Get("Content-Type"))
-				require.Equal(t, api.JsonMediaType, r.Header.Get("Accept"))
+				require.Equal(t, "deneb", r.Header.Get(api.EthConsensusVersionHeader))
+				require.Equal(t, api.JsonMediaType, r.Header.Get(api.ContentTypeHeader))
+				require.Equal(t, api.JsonMediaType, r.Header.Get(api.AcceptHeader))
 				var req structs.SignedBlindedBeaconBlockDeneb
 				err := json.NewDecoder(r.Body).Decode(&req)
 				require.NoError(t, err)
@@ -793,9 +793,9 @@ func TestSubmitBlindedBlock(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
 				require.Equal(t, postBlindedBeaconBlockPath, r.URL.Path)
-				require.Equal(t, "deneb", r.Header.Get(api.VersionHeader))
-				require.Equal(t, api.OctetStreamMediaType, r.Header.Get("Content-Type"))
-				require.Equal(t, api.OctetStreamMediaType, r.Header.Get("Accept"))
+				require.Equal(t, "deneb", r.Header.Get(api.EthConsensusVersionHeader))
+				require.Equal(t, api.OctetStreamMediaType, r.Header.Get(api.ContentTypeHeader))
+				require.Equal(t, api.OctetStreamMediaType, r.Header.Get(api.AcceptHeader))
 				epr := &ExecPayloadResponseDeneb{}
 				require.NoError(t, json.Unmarshal([]byte(testExampleExecutionPayloadDeneb), epr))
 				pro, blob, err := epr.ToProto()
@@ -807,7 +807,7 @@ func TestSubmitBlindedBlock(t *testing.T) {
 				ssz, err := combined.MarshalSSZ()
 				require.NoError(t, err)
 				header := http.Header{}
-				header.Set(api.VersionHeader, "deneb")
+				header.Set(api.EthConsensusVersionHeader, "deneb")
 				return &http.Response{
 					StatusCode: http.StatusOK,
 					Header:     header,
@@ -840,9 +840,9 @@ func TestSubmitBlindedBlock(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
 				require.Equal(t, postBlindedBeaconBlockPath, r.URL.Path)
-				require.Equal(t, "electra", r.Header.Get(api.VersionHeader))
-				require.Equal(t, api.JsonMediaType, r.Header.Get("Content-Type"))
-				require.Equal(t, api.JsonMediaType, r.Header.Get("Accept"))
+				require.Equal(t, "electra", r.Header.Get(api.EthConsensusVersionHeader))
+				require.Equal(t, api.JsonMediaType, r.Header.Get(api.ContentTypeHeader))
+				require.Equal(t, api.JsonMediaType, r.Header.Get(api.AcceptHeader))
 				var req structs.SignedBlindedBeaconBlockElectra
 				err := json.NewDecoder(r.Body).Decode(&req)
 				require.NoError(t, err)
@@ -880,9 +880,9 @@ func TestSubmitBlindedBlock(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
 				require.Equal(t, postBlindedBeaconBlockPath, r.URL.Path)
-				require.Equal(t, "electra", r.Header.Get(api.VersionHeader))
-				require.Equal(t, api.OctetStreamMediaType, r.Header.Get("Content-Type"))
-				require.Equal(t, api.OctetStreamMediaType, r.Header.Get("Accept"))
+				require.Equal(t, "electra", r.Header.Get(api.EthConsensusVersionHeader))
+				require.Equal(t, api.OctetStreamMediaType, r.Header.Get(api.ContentTypeHeader))
+				require.Equal(t, api.OctetStreamMediaType, r.Header.Get(api.AcceptHeader))
 				epr := &ExecPayloadResponseDeneb{}
 				require.NoError(t, json.Unmarshal([]byte(testExampleExecutionPayloadDeneb), epr))
 				pro, blob, err := epr.ToProto()
@@ -894,7 +894,7 @@ func TestSubmitBlindedBlock(t *testing.T) {
 				ssz, err := combined.MarshalSSZ()
 				require.NoError(t, err)
 				header := http.Header{}
-				header.Set(api.VersionHeader, "electra")
+				header.Set(api.EthConsensusVersionHeader, "electra")
 				return &http.Response{
 					StatusCode: http.StatusOK,
 					Header:     header,
@@ -1566,9 +1566,9 @@ func TestSubmitBlindedBlockPostFulu(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
 				require.Equal(t, postBlindedBeaconBlockV2Path, r.URL.Path)
-				require.Equal(t, "bellatrix", r.Header.Get("Eth-Consensus-Version"))
-				require.Equal(t, api.JsonMediaType, r.Header.Get("Content-Type"))
-				require.Equal(t, api.JsonMediaType, r.Header.Get("Accept"))
+				require.Equal(t, "bellatrix", r.Header.Get(api.EthConsensusVersionHeader))
+				require.Equal(t, api.JsonMediaType, r.Header.Get(api.ContentTypeHeader))
+				require.Equal(t, api.JsonMediaType, r.Header.Get(api.AcceptHeader))
 				// Post-Fulu: only return status code, no payload
 				return &http.Response{
 					StatusCode: http.StatusAccepted,
@@ -1591,9 +1591,9 @@ func TestSubmitBlindedBlockPostFulu(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
 				require.Equal(t, postBlindedBeaconBlockV2Path, r.URL.Path)
-				require.Equal(t, "bellatrix", r.Header.Get(api.VersionHeader))
-				require.Equal(t, api.OctetStreamMediaType, r.Header.Get("Content-Type"))
-				require.Equal(t, api.OctetStreamMediaType, r.Header.Get("Accept"))
+				require.Equal(t, "bellatrix", r.Header.Get(api.EthConsensusVersionHeader))
+				require.Equal(t, api.OctetStreamMediaType, r.Header.Get(api.ContentTypeHeader))
+				require.Equal(t, api.OctetStreamMediaType, r.Header.Get(api.AcceptHeader))
 				// Post-Fulu: only return status code, no payload
 				return &http.Response{
 					StatusCode: http.StatusAccepted,
@@ -1617,7 +1617,7 @@ func TestSubmitBlindedBlockPostFulu(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
 				require.Equal(t, postBlindedBeaconBlockV2Path, r.URL.Path)
-				require.Equal(t, "bellatrix", r.Header.Get("Eth-Consensus-Version"))
+				require.Equal(t, "bellatrix", r.Header.Get(api.EthConsensusVersionHeader))
 				message := ErrorMessage{
 					Code:    400,
 					Message: "Bad Request",
diff --git a/api/client/event/event_stream.go b/api/client/event/event_stream.go
index c8fda249c9ea..334fa868498a 100644
--- a/api/client/event/event_stream.go
+++ b/api/client/event/event_stream.go
@@ -73,8 +73,8 @@ func (h *EventStream) Subscribe(eventsChannel chan<- *Event) {
 			Data:      []byte(errors.Wrap(err, "failed to create HTTP request").Error()),
 		}
 	}
-	req.Header.Set("Accept", api.EventStreamMediaType)
-	req.Header.Set("Connection", api.KeepAlive)
+	req.Header.Set(api.AcceptHeader, api.EventStreamMediaType)
+	req.Header.Set(api.ConnectionHeader, api.KeepAlive)
 	resp, err := h.httpClient.Do(req)
 	if err != nil {
 		eventsChannel <- &Event{
diff --git a/api/client/options.go b/api/client/options.go
index 31580ffec383..caaf0257770d 100644
--- a/api/client/options.go
+++ b/api/client/options.go
@@ -4,6 +4,8 @@ import (
 	"fmt"
 	"net/http"
 	"time"
+
+	"github.com/OffchainLabs/prysm/v6/api"
 )
 
 // ReqOption is a request functional option.
@@ -12,14 +14,14 @@ type ReqOption func(*http.Request)
 // WithSSZEncoding is a request functional option that adds SSZ encoding header.
 func WithSSZEncoding() ReqOption {
 	return func(req *http.Request) {
-		req.Header.Set("Accept", "application/octet-stream")
+		req.Header.Set(api.AcceptEncodingHeader, api.OctetStreamMediaType)
 	}
 }
 
 // WithAuthorizationToken is a request functional option that adds header for authorization token.
 func WithAuthorizationToken(token string) ReqOption {
 	return func(req *http.Request) {
-		req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))
+		req.Header.Set(api.AuthorizationHeader, fmt.Sprintf("%s %s", api.BearerAuthorization, token))
 	}
 }
 
diff --git a/api/headers.go b/api/headers.go
index 69e279416c23..ac3601b381d2 100644
--- a/api/headers.go
+++ b/api/headers.go
@@ -3,18 +3,38 @@ package api
 import "net/http"
 
 const (
-	VersionHeader                 = "Eth-Consensus-Version"
-	ExecutionPayloadBlindedHeader = "Eth-Execution-Payload-Blinded"
-	ExecutionPayloadValueHeader   = "Eth-Execution-Payload-Value"
-	ConsensusBlockValueHeader     = "Eth-Consensus-Block-Value"
-	JsonMediaType                 = "application/json"
-	OctetStreamMediaType          = "application/octet-stream"
-	EventStreamMediaType          = "text/event-stream"
-	KeepAlive                     = "keep-alive"
+	// Headers
+	EthConsensusVersionHeader        = "Eth-Consensus-Version"
+	EthExecutionPayloadBlindedHeader = "Eth-Execution-Payload-Blinded"
+	EthExecutionPayloadValueHeader   = "Eth-Execution-Payload-Value"
+	EthConsensusBlockValueHeader     = "Eth-Consensus-Block-Value"
+	AcceptEncodingHeader             = "Accept-Encoding"
+	AcceptHeader                     = "Accept"
+	AccessControlAllowOriginHeader   = "Access-Control-Allow-Origin"
+	AuthorizationHeader              = "Authorization"
+	CacheControlHeader               = "Cache-Control"
+	ConnectionHeader                 = "Connection"
+	ContentEncodingHeader            = "Content-Encoding"
+	ContentLengthHeader              = "Content-Length"
+	ContentTypeHeader                = "Content-Type"
+	HostHeader                       = "Host"
+	OriginHeader                     = "Origin"
+	UserAgentHeader                  = "User-Agent"
+
+	// Header values
+	JsonMediaType        = "application/json"
+	OctetStreamMediaType = "application/octet-stream"
+	PlainMediaType       = "text/plain"
+	EventStreamMediaType = "text/event-stream"
+	KeepAlive            = "keep-alive"
+	GzipEncoding         = "gzip"
+	BasicAuthorization   = "Basic"
+	BearerAuthorization  = "Bearer"
+	NoCache              = "no-cache"
 )
 
 // SetSSEHeaders sets the headers needed for a server-sent event response.
 func SetSSEHeaders(w http.ResponseWriter) {
-	w.Header().Set("Content-Type", EventStreamMediaType)
-	w.Header().Set("Connection", KeepAlive)
+	w.Header().Set(ContentTypeHeader, EventStreamMediaType)
+	w.Header().Set(ConnectionHeader, KeepAlive)
 }
diff --git a/api/server/middleware/middleware.go b/api/server/middleware/middleware.go
index 9ab7c410c2fe..6ed7badee527 100644
--- a/api/server/middleware/middleware.go
+++ b/api/server/middleware/middleware.go
@@ -47,7 +47,7 @@ func ContentTypeHandler(acceptedMediaTypes []string) Middleware {
 				next.ServeHTTP(w, r)
 				return
 			}
-			contentType := r.Header.Get("Content-Type")
+			contentType := r.Header.Get(api.ContentTypeHeader)
 			if contentType == "" {
 				http.Error(w, "Content-Type header is missing", http.StatusUnsupportedMediaType)
 				return
@@ -75,7 +75,7 @@ func ContentTypeHandler(acceptedMediaTypes []string) Middleware {
 func AcceptHeaderHandler(serverAcceptedTypes []string) Middleware {
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			if _, ok := apiutil.Negotiate(r.Header.Get("Accept"), serverAcceptedTypes); !ok {
+			if _, ok := apiutil.Negotiate(r.Header.Get(api.AcceptHeader), serverAcceptedTypes); !ok {
 				http.Error(w, "Not Acceptable", http.StatusNotAcceptable)
 				return
 			}
@@ -88,7 +88,7 @@ func AcceptHeaderHandler(serverAcceptedTypes []string) Middleware {
 func AcceptEncodingHeaderHandler() Middleware {
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			if !strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
+			if !strings.Contains(r.Header.Get(api.AcceptEncodingHeader), api.GzipEncoding) {
 				next.ServeHTTP(w, r)
 				return
 			}
@@ -116,10 +116,10 @@ type gzipResponseWriter struct {
 }
 
 func (g *gzipResponseWriter) WriteHeader(statusCode int) {
-	if strings.Contains(g.Header().Get("Content-Type"), api.JsonMediaType) {
+	if strings.Contains(g.Header().Get(api.ContentTypeHeader), api.JsonMediaType) {
 		// Removing the current Content-Length because zipping will change it.
-		g.Header().Del("Content-Length")
-		g.Header().Set("Content-Encoding", "gzip")
+		g.Header().Del(api.ContentLengthHeader)
+		g.Header().Set(api.ContentEncodingHeader, api.GzipEncoding)
 		g.zip = true
 	}
 
diff --git a/api/server/middleware/middleware_test.go b/api/server/middleware/middleware_test.go
index 3742b5c50f97..93b75fff1496 100644
--- a/api/server/middleware/middleware_test.go
+++ b/api/server/middleware/middleware_test.go
@@ -132,7 +132,7 @@ func TestContentTypeHandler(t *testing.T) {
 			}
 			req := httptest.NewRequest(httpMethod, "/", nil)
 			if tt.contentType != "" {
-				req.Header.Set("Content-Type", tt.contentType)
+				req.Header.Set(api.ContentTypeHeader, tt.contentType)
 			}
 			rr := httptest.NewRecorder()
 
@@ -148,7 +148,7 @@ func TestContentTypeHandler(t *testing.T) {
 func TestAcceptEncodingHeaderHandler(t *testing.T) {
 	dummyContent := "Test gzip middleware content"
 	nextHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", r.Header.Get("Accept"))
+		w.Header().Set(api.ContentTypeHeader, r.Header.Get(api.AcceptHeader))
 		w.WriteHeader(http.StatusOK)
 		_, err := w.Write([]byte(dummyContent))
 		require.NoError(t, err)
@@ -165,7 +165,7 @@ func TestAcceptEncodingHeaderHandler(t *testing.T) {
 		{
 			name:             "Accept gzip",
 			accept:           api.JsonMediaType,
-			acceptEncoding:   "gzip",
+			acceptEncoding:   api.GzipEncoding,
 			expectCompressed: true,
 		},
 		{
@@ -189,7 +189,7 @@ func TestAcceptEncodingHeaderHandler(t *testing.T) {
 		{
 			name:             "SSZ",
 			accept:           api.OctetStreamMediaType,
-			acceptEncoding:   "gzip",
+			acceptEncoding:   api.GzipEncoding,
 			expectCompressed: false,
 		},
 	}
@@ -197,16 +197,16 @@ func TestAcceptEncodingHeaderHandler(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			req := httptest.NewRequest("GET", "/", nil)
-			req.Header.Set("Accept", tt.accept)
+			req.Header.Set(api.AcceptHeader, tt.accept)
 			if tt.acceptEncoding != "" {
-				req.Header.Set("Accept-Encoding", tt.acceptEncoding)
+				req.Header.Set(api.AcceptEncodingHeader, tt.acceptEncoding)
 			}
 			rr := &frozenHeaderRecorder{ResponseRecorder: httptest.NewRecorder()}
 
 			handler.ServeHTTP(rr, req)
 
 			if tt.expectCompressed {
-				require.Equal(t, "gzip", rr.frozenHeader.Get("Content-Encoding"), "Expected Content-Encoding header to be 'gzip'")
+				require.Equal(t, api.GzipEncoding, rr.frozenHeader.Get(api.ContentEncodingHeader), "Expected Content-Encoding header to be 'gzip'")
 
 				compressedBody := rr.Body.Bytes()
 				require.NotEqual(t, dummyContent, string(compressedBody), "Response body should be compressed and differ from the original")
@@ -230,7 +230,7 @@ func TestAcceptEncodingHeaderHandler(t *testing.T) {
 }
 
 func TestAcceptHeaderHandler(t *testing.T) {
-	acceptedTypes := []string{"application/json", "application/octet-stream"}
+	acceptedTypes := []string{api.JsonMediaType, api.OctetStreamMediaType}
 
 	nextHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		_, err := w.Write([]byte("next handler"))
@@ -295,7 +295,7 @@ func TestAcceptHeaderHandler(t *testing.T) {
 		t.Run(tt.name, func(t *testing.T) {
 			req := httptest.NewRequest("GET", "/", nil)
 			if tt.acceptHeader != "" {
-				req.Header.Set("Accept", tt.acceptHeader)
+				req.Header.Set(api.AcceptHeader, tt.acceptHeader)
 			}
 			rr := httptest.NewRecorder()
 
diff --git a/beacon-chain/execution/BUILD.bazel b/beacon-chain/execution/BUILD.bazel
index c2445712c896..f8266f2b03ac 100644
--- a/beacon-chain/execution/BUILD.bazel
+++ b/beacon-chain/execution/BUILD.bazel
@@ -25,6 +25,7 @@ go_library(
         "//testing/spectest:__subpackages__",
     ],
     deps = [
+        "//api:go_default_library",
         "//beacon-chain/blockchain/kzg:go_default_library",
         "//beacon-chain/cache:go_default_library",
         "//beacon-chain/cache/depositsnapshot:go_default_library",
@@ -98,6 +99,7 @@ go_test(
     data = glob(["testdata/**"]),
     embed = [":go_default_library"],
     deps = [
+        "//api:go_default_library",
         "//async/event:go_default_library",
         "//beacon-chain/blockchain/kzg:go_default_library",
         "//beacon-chain/cache/depositsnapshot:go_default_library",
diff --git a/beacon-chain/execution/engine_client_test.go b/beacon-chain/execution/engine_client_test.go
index 649da3491438..003871eba5cb 100644
--- a/beacon-chain/execution/engine_client_test.go
+++ b/beacon-chain/execution/engine_client_test.go
@@ -13,6 +13,7 @@ import (
 	"strings"
 	"testing"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/kzg"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/peerdas"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/db/filesystem"
@@ -177,7 +178,7 @@ func TestClient_HTTP(t *testing.T) {
 		want, ok := fix["ExecutionPayload"].(*pb.ExecutionPayload)
 		require.Equal(t, true, ok)
 		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			w.Header().Set("Content-Type", "application/json")
+			w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 			defer func() {
 				require.NoError(t, r.Body.Close())
 			}()
@@ -223,7 +224,7 @@ func TestClient_HTTP(t *testing.T) {
 		want, ok := fix["ExecutionPayloadCapellaWithValue"].(*pb.GetPayloadV2ResponseJson)
 		require.Equal(t, true, ok)
 		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			w.Header().Set("Content-Type", "application/json")
+			w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 			defer func() {
 				require.NoError(t, r.Body.Close())
 			}()
@@ -276,7 +277,7 @@ func TestClient_HTTP(t *testing.T) {
 		want, ok := fix["ExecutionPayloadDenebWithValue"].(*pb.GetPayloadV3ResponseJson)
 		require.Equal(t, true, ok)
 		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			w.Header().Set("Content-Type", "application/json")
+			w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 			defer func() {
 				require.NoError(t, r.Body.Close())
 			}()
@@ -331,7 +332,7 @@ func TestClient_HTTP(t *testing.T) {
 		want, ok := fix["ExecutionBundleElectra"].(*pb.GetPayloadV4ResponseJson)
 		require.Equal(t, true, ok)
 		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			w.Header().Set("Content-Type", "application/json")
+			w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 			defer func() {
 				require.NoError(t, r.Body.Close())
 			}()
@@ -413,7 +414,7 @@ func TestClient_HTTP(t *testing.T) {
 		want, ok := fix["ExecutionBundleFulu"].(*pb.GetPayloadV5ResponseJson)
 		require.Equal(t, true, ok)
 		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			w.Header().Set("Content-Type", "application/json")
+			w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 			defer func() {
 				require.NoError(t, r.Body.Close())
 			}()
@@ -935,7 +936,7 @@ func TestClient_HTTP(t *testing.T) {
 		want, ok := fix["ExecutionBlock"].(*pb.ExecutionBlock)
 		require.Equal(t, true, ok)
 		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			w.Header().Set("Content-Type", "application/json")
+			w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 			defer func() {
 				require.NoError(t, r.Body.Close())
 			}()
@@ -966,7 +967,7 @@ func TestClient_HTTP(t *testing.T) {
 		want, ok := fix["ExecutionBlock"].(*pb.ExecutionBlock)
 		require.Equal(t, true, ok)
 		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			w.Header().Set("Content-Type", "application/json")
+			w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 			defer func() {
 				require.NoError(t, r.Body.Close())
 			}()
@@ -1060,7 +1061,7 @@ func TestReconstructFullBellatrixBlock(t *testing.T) {
 		require.NoError(t, err)
 
 		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			w.Header().Set("Content-Type", "application/json")
+			w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 			defer func() {
 				require.NoError(t, r.Body.Close())
 			}()
@@ -1163,7 +1164,7 @@ func TestReconstructFullBellatrixBlockBatch(t *testing.T) {
 		require.NoError(t, err)
 
 		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			w.Header().Set("Content-Type", "application/json")
+			w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 			defer func() {
 				require.NoError(t, r.Body.Close())
 			}()
@@ -1236,7 +1237,7 @@ func TestReconstructFullBellatrixBlockBatch(t *testing.T) {
 		require.NoError(t, err)
 
 		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			w.Header().Set("Content-Type", "application/json")
+			w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 			defer func() {
 				require.NoError(t, r.Body.Close())
 			}()
@@ -2153,7 +2154,7 @@ func (*testEngineService) NewPayloadV2(
 
 func forkchoiceUpdateSetup(t *testing.T, fcs *pb.ForkchoiceState, att *pb.PayloadAttributes, res *ForkchoiceUpdatedResponse) *Service {
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		defer func() {
 			require.NoError(t, r.Body.Close())
 		}()
@@ -2192,7 +2193,7 @@ func forkchoiceUpdateSetup(t *testing.T, fcs *pb.ForkchoiceState, att *pb.Payloa
 
 func forkchoiceUpdateSetupV2(t *testing.T, fcs *pb.ForkchoiceState, att *pb.PayloadAttributesV2, res *ForkchoiceUpdatedResponse) *Service {
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		defer func() {
 			require.NoError(t, r.Body.Close())
 		}()
@@ -2231,7 +2232,7 @@ func forkchoiceUpdateSetupV2(t *testing.T, fcs *pb.ForkchoiceState, att *pb.Payl
 
 func newPayloadSetup(t *testing.T, status *pb.PayloadStatus, payload *pb.ExecutionPayload) *Service {
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		defer func() {
 			require.NoError(t, r.Body.Close())
 		}()
@@ -2265,7 +2266,7 @@ func newPayloadSetup(t *testing.T, status *pb.PayloadStatus, payload *pb.Executi
 
 func newPayloadV2Setup(t *testing.T, status *pb.PayloadStatus, payload *pb.ExecutionPayloadCapella) *Service {
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		defer func() {
 			require.NoError(t, r.Body.Close())
 		}()
@@ -2299,7 +2300,7 @@ func newPayloadV2Setup(t *testing.T, status *pb.PayloadStatus, payload *pb.Execu
 
 func newPayloadV3Setup(t *testing.T, status *pb.PayloadStatus, payload *pb.ExecutionPayloadDeneb) *Service {
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		defer func() {
 			require.NoError(t, r.Body.Close())
 		}()
@@ -2333,7 +2334,7 @@ func newPayloadV3Setup(t *testing.T, status *pb.PayloadStatus, payload *pb.Execu
 
 func newPayloadV4Setup(t *testing.T, status *pb.PayloadStatus, payload *pb.ExecutionPayloadDeneb, requests *pb.ExecutionRequests) *Service {
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		defer func() {
 			require.NoError(t, r.Body.Close())
 		}()
@@ -2414,7 +2415,7 @@ func TestReconstructBlindedBlockBatch(t *testing.T) {
 func Test_ExchangeCapabilities(t *testing.T) {
 	t.Run("empty response works", func(t *testing.T) {
 		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			w.Header().Set("Content-Type", "application/json")
+			w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 			defer func() {
 				require.NoError(t, r.Body.Close())
 			}()
@@ -2446,7 +2447,7 @@ func Test_ExchangeCapabilities(t *testing.T) {
 	})
 	t.Run("list of items", func(t *testing.T) {
 		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			w.Header().Set("Content-Type", "application/json")
+			w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 			defer func() {
 				require.NoError(t, r.Body.Close())
 			}()
@@ -2641,7 +2642,7 @@ func createRandomKzgCommitments(t *testing.T, num int) [][]byte {
 
 func createBlobServer(t *testing.T, numBlobs int, callbackFuncs ...func()) *httptest.Server {
 	return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		defer func() {
 			require.NoError(t, r.Body.Close())
 		}()
@@ -2666,7 +2667,7 @@ func createBlobServer(t *testing.T, numBlobs int, callbackFuncs ...func()) *http
 
 func createBlobServerV2(t *testing.T, numBlobs int, blobMasks []bool) *httptest.Server {
 	return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		defer func() {
 			require.NoError(t, r.Body.Close())
 		}()
diff --git a/beacon-chain/execution/mock_test.go b/beacon-chain/execution/mock_test.go
index 6db5d1d7d1d4..eb889efa7b71 100644
--- a/beacon-chain/execution/mock_test.go
+++ b/beacon-chain/execution/mock_test.go
@@ -6,6 +6,7 @@ import (
 	"net/http/httptest"
 	"testing"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	pb "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/ethereum/go-ethereum/common/hexutil"
@@ -54,7 +55,7 @@ func (s *mockEngine) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "failed to decode request: "+err.Error(), http.StatusBadRequest)
 		return
 	}
-	w.Header().Set("Content-Type", "application/json")
+	w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 	defer func() {
 		require.NoError(s.t, r.Body.Close())
 	}()
diff --git a/beacon-chain/execution/rpc_connection.go b/beacon-chain/execution/rpc_connection.go
index 7e1d8083e898..8a64180638c5 100644
--- a/beacon-chain/execution/rpc_connection.go
+++ b/beacon-chain/execution/rpc_connection.go
@@ -7,6 +7,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	contracts "github.com/OffchainLabs/prysm/v6/contracts/deposit"
 	"github.com/OffchainLabs/prysm/v6/io/logs"
@@ -120,7 +121,7 @@ func (s *Service) newRPCClientWithAuth(ctx context.Context, endpoint network.End
 		if err != nil {
 			return nil, err
 		}
-		headers.Set("Authorization", header)
+		headers.Set(api.AuthorizationHeader, header)
 	}
 	for _, h := range s.cfg.headers {
 		if h == "" {
diff --git a/beacon-chain/node/BUILD.bazel b/beacon-chain/node/BUILD.bazel
index 3a5ad5a7ae49..c1bbafc42885 100644
--- a/beacon-chain/node/BUILD.bazel
+++ b/beacon-chain/node/BUILD.bazel
@@ -82,6 +82,7 @@ go_test(
     ],
     embed = [":go_default_library"],
     deps = [
+        "//api:go_default_library",
         "//api/server/middleware:go_default_library",
         "//beacon-chain/blockchain:go_default_library",
         "//beacon-chain/builder:go_default_library",
diff --git a/beacon-chain/node/node_test.go b/beacon-chain/node/node_test.go
index ea08ccb637f2..d02186ce08ec 100644
--- a/beacon-chain/node/node_test.go
+++ b/beacon-chain/node/node_test.go
@@ -10,6 +10,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/api/server/middleware"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/builder"
@@ -249,18 +250,18 @@ func TestCORS(t *testing.T) {
 
 			// Create a request and response recorder
 			req := httptest.NewRequest("GET", "http://example.com/some-path", nil)
-			req.Header.Set("Origin", tc.origin)
+			req.Header.Set(api.OriginHeader, tc.origin)
 			rr := httptest.NewRecorder()
 
 			// Serve HTTP
 			handler.ServeHTTP(rr, req)
 
 			// Check the CORS headers based on the expected outcome
-			if tc.expectAllow && rr.Header().Get("Access-Control-Allow-Origin") != tc.origin {
-				t.Errorf("Expected Access-Control-Allow-Origin header to be %v, got %v", tc.origin, rr.Header().Get("Access-Control-Allow-Origin"))
+			if tc.expectAllow && rr.Header().Get(api.AccessControlAllowOriginHeader) != tc.origin {
+				t.Errorf("Expected Access-Control-Allow-Origin header to be %v, got %v", tc.origin, rr.Header().Get(api.AccessControlAllowOriginHeader))
 			}
-			if !tc.expectAllow && rr.Header().Get("Access-Control-Allow-Origin") != "" {
-				t.Errorf("Expected Access-Control-Allow-Origin header to be empty for disallowed origin, got %v", rr.Header().Get("Access-Control-Allow-Origin"))
+			if !tc.expectAllow && rr.Header().Get(api.AccessControlAllowOriginHeader) != "" {
+				t.Errorf("Expected Access-Control-Allow-Origin header to be empty for disallowed origin, got %v", rr.Header().Get(api.AccessControlAllowOriginHeader))
 			}
 		})
 	}
diff --git a/beacon-chain/rpc/eth/beacon/handlers.go b/beacon-chain/rpc/eth/beacon/handlers.go
index acc437f04dba..72573a18bf10 100644
--- a/beacon-chain/rpc/eth/beacon/handlers.go
+++ b/beacon-chain/rpc/eth/beacon/handlers.go
@@ -101,9 +101,9 @@ func versionHeaderFromRequest(body []byte) (string, error) {
 // from the request. If the version header is not provided and not required, it attempts
 // to derive it from the request body.
 func validateVersionHeader(r *http.Request, body []byte, versionRequired bool) (string, error) {
-	versionHeader := r.Header.Get(api.VersionHeader)
+	versionHeader := r.Header.Get(api.EthConsensusVersionHeader)
 	if versionRequired && versionHeader == "" {
-		return "", fmt.Errorf("%s header is required", api.VersionHeader)
+		return "", fmt.Errorf("%s header is required", api.EthConsensusVersionHeader)
 	}
 
 	if !versionRequired && versionHeader == "" {
@@ -219,7 +219,7 @@ func (s *Server) getBlockV2Ssz(w http.ResponseWriter, blk interfaces.ReadOnlySig
 		httputil.HandleError(w, fmt.Sprintf("Unknown block type %T", blk), http.StatusInternalServerError)
 		return
 	}
-	w.Header().Set(api.VersionHeader, version.String(blk.Version()))
+	w.Header().Set(api.EthConsensusVersionHeader, version.String(blk.Version()))
 	httputil.WriteSsz(w, result)
 }
 
@@ -254,7 +254,7 @@ func (s *Server) getBlockV2Json(ctx context.Context, w http.ResponseWriter, blk
 		httputil.HandleError(w, fmt.Sprintf("Unknown block type %T", blk), http.StatusInternalServerError)
 		return
 	}
-	w.Header().Set(api.VersionHeader, result.Version)
+	w.Header().Set(api.EthConsensusVersionHeader, result.Version)
 	httputil.WriteJson(w, result)
 }
 
@@ -368,7 +368,7 @@ func (s *Server) GetBlockAttestationsV2(w http.ResponseWriter, r *http.Request)
 		Finalized:           s.FinalizationFetcher.IsFinalized(ctx, root),
 		Data:                attBytes,
 	}
-	w.Header().Set(api.VersionHeader, version.String(v))
+	w.Header().Set(api.EthConsensusVersionHeader, version.String(v))
 	httputil.WriteJson(w, resp)
 }
 
@@ -1693,7 +1693,7 @@ func (s *Server) GetPendingConsolidations(w http.ResponseWriter, r *http.Request
 		httputil.HandleError(w, "Could not get pending consolidations: "+err.Error(), http.StatusInternalServerError)
 		return
 	}
-	w.Header().Set(api.VersionHeader, version.String(st.Version()))
+	w.Header().Set(api.EthConsensusVersionHeader, version.String(st.Version()))
 	if httputil.RespondWithSsz(r) {
 		sszData, err := serializeItems(pd)
 		if err != nil {
@@ -1749,7 +1749,7 @@ func (s *Server) GetPendingDeposits(w http.ResponseWriter, r *http.Request) {
 		httputil.HandleError(w, "Could not get pending deposits: "+err.Error(), http.StatusInternalServerError)
 		return
 	}
-	w.Header().Set(api.VersionHeader, version.String(st.Version()))
+	w.Header().Set(api.EthConsensusVersionHeader, version.String(st.Version()))
 	if httputil.RespondWithSsz(r) {
 		sszData, err := serializeItems(pd)
 		if err != nil {
@@ -1805,7 +1805,7 @@ func (s *Server) GetPendingPartialWithdrawals(w http.ResponseWriter, r *http.Req
 		httputil.HandleError(w, "Could not get pending partial withdrawals: "+err.Error(), http.StatusInternalServerError)
 		return
 	}
-	w.Header().Set(api.VersionHeader, version.String(st.Version()))
+	w.Header().Set(api.EthConsensusVersionHeader, version.String(st.Version()))
 	if httputil.RespondWithSsz(r) {
 		sszData, err := serializeItems(ppw)
 		if err != nil {
@@ -1858,7 +1858,7 @@ func (s *Server) GetProposerLookahead(w http.ResponseWriter, r *http.Request) {
 		httputil.HandleError(w, "Could not get proposer look ahead: "+err.Error(), http.StatusInternalServerError)
 		return
 	}
-	w.Header().Set(api.VersionHeader, version.String(st.Version()))
+	w.Header().Set(api.EthConsensusVersionHeader, version.String(st.Version()))
 	if httputil.RespondWithSsz(r) {
 		sszLen := (*primitives.ValidatorIndex)(nil).SizeSSZ()
 		sszData := make([]byte, len(pl)*sszLen)
diff --git a/beacon-chain/rpc/eth/beacon/handlers_pool.go b/beacon-chain/rpc/eth/beacon/handlers_pool.go
index 168519c3073e..9b24fdc3bac0 100644
--- a/beacon-chain/rpc/eth/beacon/handlers_pool.go
+++ b/beacon-chain/rpc/eth/beacon/handlers_pool.go
@@ -151,7 +151,7 @@ func (s *Server) ListAttestationsV2(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	w.Header().Set(api.VersionHeader, version.String(v))
+	w.Header().Set(api.EthConsensusVersionHeader, version.String(v))
 	httputil.WriteJson(w, &structs.ListAttestationsResponse{
 		Version: version.String(v),
 		Data:    attsData,
@@ -225,9 +225,9 @@ func (s *Server) SubmitAttestationsV2(w http.ResponseWriter, r *http.Request) {
 	ctx, span := trace.StartSpan(r.Context(), "beacon.SubmitAttestationsV2")
 	defer span.End()
 
-	versionHeader := r.Header.Get(api.VersionHeader)
+	versionHeader := r.Header.Get(api.EthConsensusVersionHeader)
 	if versionHeader == "" {
-		httputil.HandleError(w, api.VersionHeader+" header is required", http.StatusBadRequest)
+		httputil.HandleError(w, api.EthConsensusVersionHeader+" header is required", http.StatusBadRequest)
 		return
 	}
 	v, err := version.FromString(versionHeader)
@@ -786,7 +786,7 @@ func (s *Server) GetAttesterSlashingsV2(w http.ResponseWriter, r *http.Request)
 		Version: version.String(v),
 		Data:    attBytes,
 	}
-	w.Header().Set(api.VersionHeader, version.String(v))
+	w.Header().Set(api.EthConsensusVersionHeader, version.String(v))
 	httputil.WriteJson(w, resp)
 }
 
@@ -821,9 +821,9 @@ func (s *Server) SubmitAttesterSlashingsV2(w http.ResponseWriter, r *http.Reques
 	ctx, span := trace.StartSpan(r.Context(), "beacon.SubmitAttesterSlashingsV2")
 	defer span.End()
 
-	versionHeader := r.Header.Get(api.VersionHeader)
+	versionHeader := r.Header.Get(api.EthConsensusVersionHeader)
 	if versionHeader == "" {
-		httputil.HandleError(w, api.VersionHeader+" header is required", http.StatusBadRequest)
+		httputil.HandleError(w, api.EthConsensusVersionHeader+" header is required", http.StatusBadRequest)
 	}
 	v, err := version.FromString(versionHeader)
 	if err != nil {
diff --git a/beacon-chain/rpc/eth/beacon/handlers_pool_test.go b/beacon-chain/rpc/eth/beacon/handlers_pool_test.go
index d3b1a076727b..5a02c1a4127c 100644
--- a/beacon-chain/rpc/eth/beacon/handlers_pool_test.go
+++ b/beacon-chain/rpc/eth/beacon/handlers_pool_test.go
@@ -656,7 +656,7 @@ func TestSubmitAttestations(t *testing.T) {
 				_, err := body.WriteString(singleAtt)
 				require.NoError(t, err)
 				request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-				request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+				request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Phase0))
 				writer := httptest.NewRecorder()
 				writer.Body = &bytes.Buffer{}
 
@@ -685,7 +685,7 @@ func TestSubmitAttestations(t *testing.T) {
 				_, err := body.WriteString(multipleAtts)
 				require.NoError(t, err)
 				request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-				request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+				request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Phase0))
 				writer := httptest.NewRecorder()
 				writer.Body = &bytes.Buffer{}
 
@@ -705,7 +705,7 @@ func TestSubmitAttestations(t *testing.T) {
 				_, err := body.WriteString(singleAtt)
 				require.NoError(t, err)
 				request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-				request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+				request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Phase0))
 				writer := httptest.NewRecorder()
 				writer.Body = &bytes.Buffer{}
 
@@ -721,7 +721,7 @@ func TestSubmitAttestations(t *testing.T) {
 				_, err := body.WriteString(singleAttElectra)
 				require.NoError(t, err)
 				request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-				request.Header.Set(api.VersionHeader, version.String(version.Electra))
+				request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 				writer := httptest.NewRecorder()
 				writer.Body = &bytes.Buffer{}
 
@@ -734,7 +734,7 @@ func TestSubmitAttestations(t *testing.T) {
 			})
 			t.Run("no body", func(t *testing.T) {
 				request := httptest.NewRequest(http.MethodPost, "http://example.com", nil)
-				request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+				request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Phase0))
 				writer := httptest.NewRecorder()
 				writer.Body = &bytes.Buffer{}
 
@@ -750,7 +750,7 @@ func TestSubmitAttestations(t *testing.T) {
 				_, err := body.WriteString("[]")
 				require.NoError(t, err)
 				request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-				request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+				request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Phase0))
 				writer := httptest.NewRecorder()
 				writer.Body = &bytes.Buffer{}
 
@@ -766,7 +766,7 @@ func TestSubmitAttestations(t *testing.T) {
 				_, err := body.WriteString(invalidAtt)
 				require.NoError(t, err)
 				request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-				request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+				request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Phase0))
 				writer := httptest.NewRecorder()
 				writer.Body = &bytes.Buffer{}
 
@@ -794,7 +794,7 @@ func TestSubmitAttestations(t *testing.T) {
 				_, err := body.WriteString(singleAttElectra)
 				require.NoError(t, err)
 				request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-				request.Header.Set(api.VersionHeader, version.String(version.Electra))
+				request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 				writer := httptest.NewRecorder()
 				writer.Body = &bytes.Buffer{}
 
@@ -823,7 +823,7 @@ func TestSubmitAttestations(t *testing.T) {
 				_, err := body.WriteString(multipleAttsElectra)
 				require.NoError(t, err)
 				request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-				request.Header.Set(api.VersionHeader, version.String(version.Electra))
+				request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 				writer := httptest.NewRecorder()
 				writer.Body = &bytes.Buffer{}
 
@@ -835,7 +835,7 @@ func TestSubmitAttestations(t *testing.T) {
 			})
 			t.Run("no body", func(t *testing.T) {
 				request := httptest.NewRequest(http.MethodPost, "http://example.com", nil)
-				request.Header.Set(api.VersionHeader, version.String(version.Electra))
+				request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 				writer := httptest.NewRecorder()
 				writer.Body = &bytes.Buffer{}
 
@@ -851,7 +851,7 @@ func TestSubmitAttestations(t *testing.T) {
 				_, err := body.WriteString("[]")
 				require.NoError(t, err)
 				request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-				request.Header.Set(api.VersionHeader, version.String(version.Electra))
+				request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 				writer := httptest.NewRecorder()
 				writer.Body = &bytes.Buffer{}
 
@@ -867,7 +867,7 @@ func TestSubmitAttestations(t *testing.T) {
 				_, err := body.WriteString(invalidAttElectra)
 				require.NoError(t, err)
 				request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-				request.Header.Set(api.VersionHeader, version.String(version.Electra))
+				request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 				writer := httptest.NewRecorder()
 				writer.Body = &bytes.Buffer{}
 
@@ -2168,7 +2168,7 @@ func TestSubmitAttesterSlashings(t *testing.T) {
 			_, err = body.Write(b)
 			require.NoError(t, err)
 			request := httptest.NewRequest(http.MethodPost, "http://example.com/beacon/pool/attester_electras", &body)
-			request.Header.Set(api.VersionHeader, version.String(version.Electra))
+			request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
 
@@ -2232,7 +2232,7 @@ func TestSubmitAttesterSlashings(t *testing.T) {
 			_, err = body.Write(b)
 			require.NoError(t, err)
 			request := httptest.NewRequest(http.MethodPost, "http://example.com/beacon/pool/attester_slashings", &body)
-			request.Header.Set(api.VersionHeader, version.String(version.Electra))
+			request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
 
@@ -2262,7 +2262,7 @@ func TestSubmitAttesterSlashings(t *testing.T) {
 		_, err = body.WriteString(invalidAttesterSlashing)
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://example.com/beacon/pool/attester_slashings", &body)
-		request.Header.Set(api.VersionHeader, version.String(version.Electra))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
diff --git a/beacon-chain/rpc/eth/beacon/handlers_test.go b/beacon-chain/rpc/eth/beacon/handlers_test.go
index d39830dec98a..5e1274fa9428 100644
--- a/beacon-chain/rpc/eth/beacon/handlers_test.go
+++ b/beacon-chain/rpc/eth/beacon/handlers_test.go
@@ -425,13 +425,13 @@ func TestGetBlockSSZV2(t *testing.T) {
 
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example/eth/v2/beacon/blocks/{block_id}", nil)
 		request.SetPathValue("block_id", "head")
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
 		s.GetBlockV2(writer, request)
 		require.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, version.String(version.Phase0), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Phase0), writer.Header().Get(api.EthConsensusVersionHeader))
 		sszExpected, err := b.MarshalSSZ()
 		require.NoError(t, err)
 		assert.DeepEqual(t, sszExpected, writer.Body.Bytes())
@@ -448,13 +448,13 @@ func TestGetBlockSSZV2(t *testing.T) {
 
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example/eth/v2/beacon/blocks/{block_id}", nil)
 		request.SetPathValue("block_id", "head")
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
 		s.GetBlockV2(writer, request)
 		require.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, version.String(version.Altair), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Altair), writer.Header().Get(api.EthConsensusVersionHeader))
 		sszExpected, err := b.MarshalSSZ()
 		require.NoError(t, err)
 		assert.DeepEqual(t, sszExpected, writer.Body.Bytes())
@@ -471,13 +471,13 @@ func TestGetBlockSSZV2(t *testing.T) {
 
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example/eth/v2/beacon/blocks/{block_id}", nil)
 		request.SetPathValue("block_id", "head")
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
 		s.GetBlockV2(writer, request)
 		require.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, version.String(version.Bellatrix), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Bellatrix), writer.Header().Get(api.EthConsensusVersionHeader))
 		sszExpected, err := b.MarshalSSZ()
 		require.NoError(t, err)
 		assert.DeepEqual(t, sszExpected, writer.Body.Bytes())
@@ -494,13 +494,13 @@ func TestGetBlockSSZV2(t *testing.T) {
 
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example/eth/v2/beacon/blocks/{block_id}", nil)
 		request.SetPathValue("block_id", "head")
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
 		s.GetBlockV2(writer, request)
 		require.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, version.String(version.Capella), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Capella), writer.Header().Get(api.EthConsensusVersionHeader))
 		sszExpected, err := b.MarshalSSZ()
 		require.NoError(t, err)
 		assert.DeepEqual(t, sszExpected, writer.Body.Bytes())
@@ -517,13 +517,13 @@ func TestGetBlockSSZV2(t *testing.T) {
 
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example/eth/v2/beacon/blocks/{block_id}", nil)
 		request.SetPathValue("block_id", "head")
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
 		s.GetBlockV2(writer, request)
 		require.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, version.String(version.Deneb), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Deneb), writer.Header().Get(api.EthConsensusVersionHeader))
 		sszExpected, err := b.MarshalSSZ()
 		require.NoError(t, err)
 		assert.DeepEqual(t, sszExpected, writer.Body.Bytes())
@@ -540,13 +540,13 @@ func TestGetBlockSSZV2(t *testing.T) {
 
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example/eth/v2/beacon/blocks/{block_id}", nil)
 		request.SetPathValue("block_id", "head")
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
 		s.GetBlockV2(writer, request)
 		require.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, version.String(version.Electra), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Electra), writer.Header().Get(api.EthConsensusVersionHeader))
 		sszExpected, err := b.MarshalSSZ()
 		require.NoError(t, err)
 		assert.DeepEqual(t, sszExpected, writer.Body.Bytes())
@@ -563,13 +563,13 @@ func TestGetBlockSSZV2(t *testing.T) {
 
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example/eth/v2/beacon/blocks/{block_id}", nil)
 		request.SetPathValue("block_id", "head")
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
 		s.GetBlockV2(writer, request)
 		require.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, version.String(version.Fulu), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Fulu), writer.Header().Get(api.EthConsensusVersionHeader))
 		sszExpected, err := b.MarshalSSZ()
 		require.NoError(t, err)
 		assert.DeepEqual(t, sszExpected, writer.Body.Bytes())
@@ -1307,13 +1307,13 @@ func TestGetBlindedBlockSSZ(t *testing.T) {
 
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example/eth/v1/beacon/blinded_blocks/{block_id}", nil)
 		request.SetPathValue("block_id", "head")
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
 		s.GetBlindedBlock(writer, request)
 		require.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, version.String(version.Phase0), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Phase0), writer.Header().Get(api.EthConsensusVersionHeader))
 		sszExpected, err := b.MarshalSSZ()
 		require.NoError(t, err)
 		assert.DeepEqual(t, sszExpected, writer.Body.Bytes())
@@ -1329,13 +1329,13 @@ func TestGetBlindedBlockSSZ(t *testing.T) {
 
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example/eth/v1/beacon/blinded_blocks/{block_id}", nil)
 		request.SetPathValue("block_id", "head")
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
 		s.GetBlindedBlock(writer, request)
 		require.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, version.String(version.Altair), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Altair), writer.Header().Get(api.EthConsensusVersionHeader))
 		sszExpected, err := b.MarshalSSZ()
 		require.NoError(t, err)
 		assert.DeepEqual(t, sszExpected, writer.Body.Bytes())
@@ -1351,13 +1351,13 @@ func TestGetBlindedBlockSSZ(t *testing.T) {
 
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example/eth/v1/beacon/blinded_blocks/{block_id}", nil)
 		request.SetPathValue("block_id", "head")
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
 		s.GetBlindedBlock(writer, request)
 		require.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, version.String(version.Bellatrix), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Bellatrix), writer.Header().Get(api.EthConsensusVersionHeader))
 		sszExpected, err := b.MarshalSSZ()
 		require.NoError(t, err)
 		assert.DeepEqual(t, sszExpected, writer.Body.Bytes())
@@ -1373,13 +1373,13 @@ func TestGetBlindedBlockSSZ(t *testing.T) {
 
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example/eth/v1/beacon/blinded_blocks/{block_id}", nil)
 		request.SetPathValue("block_id", "head")
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
 		s.GetBlindedBlock(writer, request)
 		require.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, version.String(version.Capella), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Capella), writer.Header().Get(api.EthConsensusVersionHeader))
 		sszExpected, err := b.MarshalSSZ()
 		require.NoError(t, err)
 		assert.DeepEqual(t, sszExpected, writer.Body.Bytes())
@@ -1395,13 +1395,13 @@ func TestGetBlindedBlockSSZ(t *testing.T) {
 
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example/eth/v1/beacon/blinded_blocks/{block_id}", nil)
 		request.SetPathValue("block_id", "head")
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
 		s.GetBlindedBlock(writer, request)
 		require.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, version.String(version.Deneb), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Deneb), writer.Header().Get(api.EthConsensusVersionHeader))
 		sszExpected, err := b.MarshalSSZ()
 		require.NoError(t, err)
 		assert.DeepEqual(t, sszExpected, writer.Body.Bytes())
@@ -1426,7 +1426,7 @@ func TestPublishBlock(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.Phase0Block)))
-		request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Phase0))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -1448,7 +1448,7 @@ func TestPublishBlock(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.AltairBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Altair))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Altair))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -1472,7 +1472,7 @@ func TestPublishBlock(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BellatrixBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Bellatrix))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -1496,7 +1496,7 @@ func TestPublishBlock(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.CapellaBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Capella))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -1551,7 +1551,7 @@ func TestPublishBlock(t *testing.T) {
 			SyncChecker:             &mockSync.Sync{IsSyncing: false},
 		}
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.DenebBlockContents)))
-		request.Header.Set(api.VersionHeader, version.String(version.Deneb))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Deneb))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -1574,7 +1574,7 @@ func TestPublishBlock(t *testing.T) {
 			SyncChecker:             &mockSync.Sync{IsSyncing: false},
 		}
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.ElectraBlockContents)))
-		request.Header.Set(api.VersionHeader, version.String(version.Electra))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -1642,7 +1642,7 @@ func TestPublishBlock(t *testing.T) {
 			SyncChecker:             &mockSync.Sync{IsSyncing: false},
 		}
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.FuluBlockContents)))
-		request.Header.Set(api.VersionHeader, version.String(version.Fulu))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Fulu))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -1654,7 +1654,7 @@ func TestPublishBlock(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BlindedBellatrixBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Bellatrix))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -1667,7 +1667,7 @@ func TestPublishBlock(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BellatrixBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Capella))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -1888,8 +1888,8 @@ func TestPublishBlockSSZ(t *testing.T) {
 		ssz, err := genericBlock.GetPhase0().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Phase0))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -1918,8 +1918,8 @@ func TestPublishBlockSSZ(t *testing.T) {
 		ssz, err := genericBlock.GetAltair().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Altair))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Altair))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -1943,8 +1943,8 @@ func TestPublishBlockSSZ(t *testing.T) {
 		ssz, err := genericBlock.GetBellatrix().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Bellatrix))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -1969,8 +1969,8 @@ func TestPublishBlockSSZ(t *testing.T) {
 		ssz, err := genericBlock.GetCapella().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Capella))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -1995,8 +1995,8 @@ func TestPublishBlockSSZ(t *testing.T) {
 		ssz, err := genericBlock.GetDeneb().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Deneb))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Deneb))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -2021,8 +2021,8 @@ func TestPublishBlockSSZ(t *testing.T) {
 		ssz, err := genericBlock.GetElectra().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Electra))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -2047,8 +2047,8 @@ func TestPublishBlockSSZ(t *testing.T) {
 		ssz, err := genericBlock.GetFulu().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Fulu))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Fulu))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -2067,8 +2067,8 @@ func TestPublishBlockSSZ(t *testing.T) {
 		ssz, err := genericBlock.GetBlindedBellatrix().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Bellatrix))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -2088,8 +2088,8 @@ func TestPublishBlockSSZ(t *testing.T) {
 		ssz, err := genericBlock.GetBellatrix().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Capella))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -2106,7 +2106,7 @@ func TestPublishBlockSSZ(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte("foo")))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlock(writer, request)
@@ -2133,7 +2133,7 @@ func TestPublishBlindedBlock(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.Phase0Block)))
-		request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Phase0))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2155,7 +2155,7 @@ func TestPublishBlindedBlock(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.AltairBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Altair))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Altair))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2179,7 +2179,7 @@ func TestPublishBlindedBlock(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BlindedBellatrixBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Bellatrix))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2203,7 +2203,7 @@ func TestPublishBlindedBlock(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BlindedCapellaBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Capella))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2227,7 +2227,7 @@ func TestPublishBlindedBlock(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BlindedDenebBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Deneb))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Deneb))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2251,7 +2251,7 @@ func TestPublishBlindedBlock(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BlindedElectraBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Electra))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2321,7 +2321,7 @@ func TestPublishBlindedBlock(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BlindedFuluBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Fulu))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Fulu))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2333,7 +2333,7 @@ func TestPublishBlindedBlock(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BellatrixBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Bellatrix))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2346,7 +2346,7 @@ func TestPublishBlindedBlock(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BlindedBellatrixBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Capella))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2396,8 +2396,8 @@ func TestPublishBlindedBlockSSZ(t *testing.T) {
 		ssz, err := genericBlock.GetPhase0().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Phase0))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2426,8 +2426,8 @@ func TestPublishBlindedBlockSSZ(t *testing.T) {
 		ssz, err := genericBlock.GetAltair().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Altair))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Altair))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2452,8 +2452,8 @@ func TestPublishBlindedBlockSSZ(t *testing.T) {
 		ssz, err := genericBlock.GetBlindedBellatrix().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Bellatrix))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2478,8 +2478,8 @@ func TestPublishBlindedBlockSSZ(t *testing.T) {
 		ssz, err := genericBlock.GetBlindedCapella().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Capella))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2504,8 +2504,8 @@ func TestPublishBlindedBlockSSZ(t *testing.T) {
 		ssz, err := genericBlock.GetBlindedDeneb().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Deneb))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Deneb))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2530,8 +2530,8 @@ func TestPublishBlindedBlockSSZ(t *testing.T) {
 		ssz, err := genericBlock.GetBlindedElectra().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Electra))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2556,8 +2556,8 @@ func TestPublishBlindedBlockSSZ(t *testing.T) {
 		ssz, err := genericBlock.GetBlindedFulu().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Fulu))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Fulu))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2569,7 +2569,7 @@ func TestPublishBlindedBlockSSZ(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BellatrixBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Bellatrix))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2589,8 +2589,8 @@ func TestPublishBlindedBlockSSZ(t *testing.T) {
 		ssz, err := genericBlock.GetBlindedBellatrix().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Capella))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2607,7 +2607,7 @@ func TestPublishBlindedBlockSSZ(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte("foo")))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -2634,7 +2634,7 @@ func TestPublishBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.Phase0Block)))
-		request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Phase0))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -2656,7 +2656,7 @@ func TestPublishBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.AltairBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Altair))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Altair))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -2680,7 +2680,7 @@ func TestPublishBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BellatrixBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Bellatrix))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -2704,7 +2704,7 @@ func TestPublishBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.CapellaBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Capella))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -2728,7 +2728,7 @@ func TestPublishBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.DenebBlockContents)))
-		request.Header.Set(api.VersionHeader, version.String(version.Deneb))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Deneb))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -2752,7 +2752,7 @@ func TestPublishBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.ElectraBlockContents)))
-		request.Header.Set(api.VersionHeader, version.String(version.Electra))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -2776,7 +2776,7 @@ func TestPublishBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.FuluBlockContents)))
-		request.Header.Set(api.VersionHeader, version.String(version.Fulu))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Fulu))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -2788,7 +2788,7 @@ func TestPublishBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BlindedBellatrixBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Bellatrix))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -2801,7 +2801,7 @@ func TestPublishBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BellatrixBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Capella))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -2818,7 +2818,7 @@ func TestPublishBlockV2(t *testing.T) {
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
 		assert.Equal(t, http.StatusBadRequest, writer.Code)
-		assert.StringContains(t, api.VersionHeader+" header is required", writer.Body.String())
+		assert.StringContains(t, api.EthConsensusVersionHeader+" header is required", writer.Body.String())
 	})
 	t.Run("syncing", func(t *testing.T) {
 		chainService := &chainMock.ChainService{}
@@ -2830,7 +2830,7 @@ func TestPublishBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte("foo")))
-		request.Header.Set(api.VersionHeader, version.String(version.Capella))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -2864,8 +2864,8 @@ func TestPublishBlockV2SSZ(t *testing.T) {
 		ssz, err := genericBlock.GetPhase0().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Phase0))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -2894,8 +2894,8 @@ func TestPublishBlockV2SSZ(t *testing.T) {
 		ssz, err := genericBlock.GetAltair().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Altair))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Altair))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -2919,8 +2919,8 @@ func TestPublishBlockV2SSZ(t *testing.T) {
 		ssz, err := genericBlock.GetBellatrix().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Bellatrix))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -2945,8 +2945,8 @@ func TestPublishBlockV2SSZ(t *testing.T) {
 		ssz, err := genericBlock.GetCapella().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Capella))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -2971,8 +2971,8 @@ func TestPublishBlockV2SSZ(t *testing.T) {
 		ssz, err := genericBlock.GetDeneb().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Deneb))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Deneb))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -2997,8 +2997,8 @@ func TestPublishBlockV2SSZ(t *testing.T) {
 		ssz, err := genericBlock.GetElectra().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Electra))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -3023,8 +3023,8 @@ func TestPublishBlockV2SSZ(t *testing.T) {
 		ssz, err := genericBlock.GetFulu().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Fulu))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Fulu))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -3043,8 +3043,8 @@ func TestPublishBlockV2SSZ(t *testing.T) {
 		ssz, err := genericBlock.GetBlindedBellatrix().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Bellatrix))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -3064,8 +3064,8 @@ func TestPublishBlockV2SSZ(t *testing.T) {
 		ssz, err := genericBlock.GetBellatrix().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Capella))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -3078,12 +3078,12 @@ func TestPublishBlockV2SSZ(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.CapellaBlock)))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
 		assert.Equal(t, http.StatusBadRequest, writer.Code)
-		assert.StringContains(t, api.VersionHeader+" header is required", writer.Body.String())
+		assert.StringContains(t, api.EthConsensusVersionHeader+" header is required", writer.Body.String())
 	})
 	t.Run("syncing", func(t *testing.T) {
 		chainService := &chainMock.ChainService{}
@@ -3095,7 +3095,7 @@ func TestPublishBlockV2SSZ(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte("foo")))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
@@ -3122,7 +3122,7 @@ func TestPublishBlindedBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.Phase0Block)))
-		request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Phase0))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlockV2(writer, request)
@@ -3144,7 +3144,7 @@ func TestPublishBlindedBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.AltairBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Altair))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Altair))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlockV2(writer, request)
@@ -3168,7 +3168,7 @@ func TestPublishBlindedBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BlindedBellatrixBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Bellatrix))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlockV2(writer, request)
@@ -3192,7 +3192,7 @@ func TestPublishBlindedBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BlindedCapellaBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Capella))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlockV2(writer, request)
@@ -3216,7 +3216,7 @@ func TestPublishBlindedBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BlindedDenebBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Deneb))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Deneb))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlockV2(writer, request)
@@ -3240,7 +3240,7 @@ func TestPublishBlindedBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BlindedElectraBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Electra))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlockV2(writer, request)
@@ -3264,7 +3264,7 @@ func TestPublishBlindedBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BlindedFuluBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Fulu))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Fulu))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlockV2(writer, request)
@@ -3276,7 +3276,7 @@ func TestPublishBlindedBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BellatrixBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Bellatrix))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlockV2(writer, request)
@@ -3289,7 +3289,7 @@ func TestPublishBlindedBlockV2(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BlindedBellatrixBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Capella))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlockV2(writer, request)
@@ -3306,7 +3306,7 @@ func TestPublishBlindedBlockV2(t *testing.T) {
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
 		assert.Equal(t, http.StatusBadRequest, writer.Code)
-		assert.StringContains(t, api.VersionHeader+" header is required", writer.Body.String())
+		assert.StringContains(t, api.EthConsensusVersionHeader+" header is required", writer.Body.String())
 	})
 	t.Run("syncing", func(t *testing.T) {
 		chainService := &chainMock.ChainService{}
@@ -3351,8 +3351,8 @@ func TestPublishBlindedBlockV2SSZ(t *testing.T) {
 		ssz, err := genericBlock.GetPhase0().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Phase0))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlockV2(writer, request)
@@ -3381,8 +3381,8 @@ func TestPublishBlindedBlockV2SSZ(t *testing.T) {
 		ssz, err := genericBlock.GetAltair().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Altair))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Altair))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlockV2(writer, request)
@@ -3407,8 +3407,8 @@ func TestPublishBlindedBlockV2SSZ(t *testing.T) {
 		ssz, err := genericBlock.GetBlindedBellatrix().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Bellatrix))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlockV2(writer, request)
@@ -3433,8 +3433,8 @@ func TestPublishBlindedBlockV2SSZ(t *testing.T) {
 		ssz, err := genericBlock.GetBlindedCapella().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Capella))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlockV2(writer, request)
@@ -3459,8 +3459,8 @@ func TestPublishBlindedBlockV2SSZ(t *testing.T) {
 		ssz, err := genericBlock.GetBlindedDeneb().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Deneb))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Deneb))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -3485,8 +3485,8 @@ func TestPublishBlindedBlockV2SSZ(t *testing.T) {
 		ssz, err := genericBlock.GetBlindedElectra().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Electra))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -3511,8 +3511,8 @@ func TestPublishBlindedBlockV2SSZ(t *testing.T) {
 		ssz, err := genericBlock.GetBlindedFulu().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Fulu))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Fulu))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlock(writer, request)
@@ -3524,7 +3524,7 @@ func TestPublishBlindedBlockV2SSZ(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BellatrixBlock)))
-		request.Header.Set(api.VersionHeader, version.String(version.Bellatrix))
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlockV2(writer, request)
@@ -3544,8 +3544,8 @@ func TestPublishBlindedBlockV2SSZ(t *testing.T) {
 		ssz, err := genericBlock.GetBlindedBellatrix().MarshalSSZ()
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader(ssz))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
-		request.Header.Set(api.VersionHeader, version.String(version.Capella))
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+		request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlockV2(writer, request)
@@ -3558,12 +3558,12 @@ func TestPublishBlindedBlockV2SSZ(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte(rpctesting.BlindedCapellaBlock)))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlockV2(writer, request)
 		assert.Equal(t, http.StatusBadRequest, writer.Code)
-		assert.StringContains(t, api.VersionHeader+" header is required", writer.Body.String())
+		assert.StringContains(t, api.EthConsensusVersionHeader+" header is required", writer.Body.String())
 	})
 	t.Run("syncing", func(t *testing.T) {
 		chainService := &chainMock.ChainService{}
@@ -3575,7 +3575,7 @@ func TestPublishBlindedBlockV2SSZ(t *testing.T) {
 		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", bytes.NewReader([]byte("foo")))
-		request.Header.Set("Content-Type", api.OctetStreamMediaType)
+		request.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.PublishBlindedBlockV2(writer, request)
@@ -3870,7 +3870,7 @@ func TestGetStateFork(t *testing.T) {
 	ctx := t.Context()
 	request := httptest.NewRequest(http.MethodGet, "http://foo.example/eth/v1/beacon/states/{state_id}/fork", nil)
 	request.SetPathValue("state_id", "head")
-	request.Header.Set("Accept", "application/octet-stream")
+	request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 	writer := httptest.NewRecorder()
 	writer.Body = &bytes.Buffer{}
 
@@ -3909,7 +3909,7 @@ func TestGetStateFork(t *testing.T) {
 	t.Run("execution optimistic", func(t *testing.T) {
 		request = httptest.NewRequest(http.MethodGet, "http://foo.example/eth/v1/beacon/states/{state_id}/fork", nil)
 		request.SetPathValue("state_id", "head")
-		request.Header.Set("Accept", "application/octet-stream")
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer = httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		parentRoot := [32]byte{'a'}
@@ -3940,7 +3940,7 @@ func TestGetStateFork(t *testing.T) {
 	t.Run("finalized", func(t *testing.T) {
 		request = httptest.NewRequest(http.MethodGet, "http://foo.example/eth/v1/beacon/states/{state_id}/fork", nil)
 		request.SetPathValue("state_id", "head")
-		request.Header.Set("Accept", "application/octet-stream")
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer = httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		parentRoot := [32]byte{'a'}
@@ -4838,7 +4838,7 @@ func TestGetDepositSnapshot(t *testing.T) {
 	})
 	t.Run("SSZ response", func(t *testing.T) {
 		writer.Body = &bytes.Buffer{}
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		s.GetDepositSnapshot(writer, request)
 		assert.Equal(t, http.StatusOK, writer.Code)
 		resp := &eth.DepositSnapshot{}
@@ -5177,7 +5177,7 @@ func TestGetPendingConsolidations(t *testing.T) {
 
 		server.GetPendingConsolidations(rec, req)
 		require.Equal(t, http.StatusOK, rec.Code)
-		require.Equal(t, "electra", rec.Header().Get(api.VersionHeader))
+		require.Equal(t, "electra", rec.Header().Get(api.EthConsensusVersionHeader))
 
 		var resp structs.GetPendingConsolidationsResponse
 		require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
@@ -5193,14 +5193,14 @@ func TestGetPendingConsolidations(t *testing.T) {
 	})
 	t.Run("ssz response", func(t *testing.T) {
 		req := httptest.NewRequest(http.MethodGet, "http://example.com/eth/v1/beacon/states/{state_id}/pending_consolidations", nil)
-		req.Header.Set("Accept", "application/octet-stream")
+		req.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		req.SetPathValue("state_id", "head")
 		rec := httptest.NewRecorder()
 		rec.Body = new(bytes.Buffer)
 
 		server.GetPendingConsolidations(rec, req)
 		require.Equal(t, http.StatusOK, rec.Code)
-		require.Equal(t, "electra", rec.Header().Get(api.VersionHeader))
+		require.Equal(t, "electra", rec.Header().Get(api.EthConsensusVersionHeader))
 
 		responseBytes := rec.Body.Bytes()
 		var recoveredConsolidations []*eth.PendingConsolidation
@@ -5247,7 +5247,7 @@ func TestGetPendingConsolidations(t *testing.T) {
 
 		// Test SSZ request
 		sszReq := httptest.NewRequest(http.MethodGet, "http://example.com/eth/v1/beacon/states/{state_id}/pending_consolidations", nil)
-		sszReq.Header.Set("Accept", "application/octet-stream")
+		sszReq.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		sszReq.SetPathValue("state_id", "head")
 		sszRec := httptest.NewRecorder()
 		sszRec.Body = new(bytes.Buffer)
@@ -5370,7 +5370,7 @@ func TestGetPendingDeposits(t *testing.T) {
 
 		server.GetPendingDeposits(rec, req)
 		require.Equal(t, http.StatusOK, rec.Code)
-		require.Equal(t, "electra", rec.Header().Get(api.VersionHeader))
+		require.Equal(t, "electra", rec.Header().Get(api.EthConsensusVersionHeader))
 
 		var resp structs.GetPendingDepositsResponse
 		require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
@@ -5386,14 +5386,14 @@ func TestGetPendingDeposits(t *testing.T) {
 	})
 	t.Run("ssz response", func(t *testing.T) {
 		req := httptest.NewRequest(http.MethodGet, "http://example.com/eth/v1/beacon/states/{state_id}/pending_deposits", nil)
-		req.Header.Set("Accept", "application/octet-stream")
+		req.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		req.SetPathValue("state_id", "head")
 		rec := httptest.NewRecorder()
 		rec.Body = new(bytes.Buffer)
 
 		server.GetPendingDeposits(rec, req)
 		require.Equal(t, http.StatusOK, rec.Code)
-		require.Equal(t, "electra", rec.Header().Get(api.VersionHeader))
+		require.Equal(t, "electra", rec.Header().Get(api.EthConsensusVersionHeader))
 
 		responseBytes := rec.Body.Bytes()
 		var recoveredDeposits []*eth.PendingDeposit
@@ -5440,7 +5440,7 @@ func TestGetPendingDeposits(t *testing.T) {
 
 		// Test SSZ request
 		sszReq := httptest.NewRequest(http.MethodGet, "http://example.com/eth/v1/beacon/states/{state_id}/pending_deposits", nil)
-		sszReq.Header.Set("Accept", "application/octet-stream")
+		sszReq.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		sszReq.SetPathValue("state_id", "head")
 		sszRec := httptest.NewRecorder()
 		sszRec.Body = new(bytes.Buffer)
@@ -5557,7 +5557,7 @@ func TestGetPendingPartialWithdrawals(t *testing.T) {
 
 		server.GetPendingPartialWithdrawals(rec, req)
 		require.Equal(t, http.StatusOK, rec.Code)
-		require.Equal(t, "electra", rec.Header().Get(api.VersionHeader))
+		require.Equal(t, "electra", rec.Header().Get(api.EthConsensusVersionHeader))
 
 		var resp structs.GetPendingPartialWithdrawalsResponse
 		require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
@@ -5574,14 +5574,14 @@ func TestGetPendingPartialWithdrawals(t *testing.T) {
 
 	t.Run("ssz response", func(t *testing.T) {
 		req := httptest.NewRequest(http.MethodGet, "http://example.com/eth/v1/beacon/states/{state_id}/pending_partial_withdrawals", nil)
-		req.Header.Set("Accept", "application/octet-stream")
+		req.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		req.SetPathValue("state_id", "head")
 		rec := httptest.NewRecorder()
 		rec.Body = new(bytes.Buffer)
 
 		server.GetPendingPartialWithdrawals(rec, req)
 		require.Equal(t, http.StatusOK, rec.Code)
-		require.Equal(t, "electra", rec.Header().Get(api.VersionHeader))
+		require.Equal(t, "electra", rec.Header().Get(api.EthConsensusVersionHeader))
 
 		responseBytes := rec.Body.Bytes()
 		var recoveredWithdrawals []*eth.PendingPartialWithdrawal
@@ -5628,7 +5628,7 @@ func TestGetPendingPartialWithdrawals(t *testing.T) {
 
 		// Test SSZ request
 		sszReq := httptest.NewRequest(http.MethodGet, "http://example.com/eth/v1/beacon/states/{state_id}/pending_partial_withdrawals", nil)
-		sszReq.Header.Set("Accept", "application/octet-stream")
+		sszReq.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		sszReq.SetPathValue("state_id", "head")
 		sszRec := httptest.NewRecorder()
 		sszRec.Body = new(bytes.Buffer)
@@ -5745,7 +5745,7 @@ func TestGetProposerLookahead(t *testing.T) {
 
 		server.GetProposerLookahead(rec, req)
 		require.Equal(t, http.StatusOK, rec.Code)
-		require.Equal(t, "fulu", rec.Header().Get(api.VersionHeader))
+		require.Equal(t, "fulu", rec.Header().Get(api.EthConsensusVersionHeader))
 
 		var resp structs.GetProposerLookaheadResponse
 		require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
@@ -5765,14 +5765,14 @@ func TestGetProposerLookahead(t *testing.T) {
 
 	t.Run("ssz response", func(t *testing.T) {
 		req := httptest.NewRequest(http.MethodGet, "http://example.com/eth/v1/beacon/states/{state_id}/proposer_lookahead", nil)
-		req.Header.Set("Accept", "application/octet-stream")
+		req.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		req.SetPathValue("state_id", "head")
 		rec := httptest.NewRecorder()
 		rec.Body = new(bytes.Buffer)
 
 		server.GetProposerLookahead(rec, req)
 		require.Equal(t, http.StatusOK, rec.Code)
-		require.Equal(t, "fulu", rec.Header().Get(api.VersionHeader))
+		require.Equal(t, "fulu", rec.Header().Get(api.EthConsensusVersionHeader))
 		responseBytes := rec.Body.Bytes()
 		validatorIndexSize := (*primitives.ValidatorIndex)(nil).SizeSSZ()
 		require.Equal(t, len(responseBytes), validatorIndexSize*lookaheadSize)
@@ -5816,7 +5816,7 @@ func TestGetProposerLookahead(t *testing.T) {
 
 		// Test SSZ request
 		sszReq := httptest.NewRequest(http.MethodGet, "http://example.com/eth/v1/beacon/states/{state_id}/proposer_lookahead", nil)
-		sszReq.Header.Set("Accept", "application/octet-stream")
+		sszReq.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		sszReq.SetPathValue("state_id", "head")
 		sszRec := httptest.NewRecorder()
 		sszRec.Body = new(bytes.Buffer)
diff --git a/beacon-chain/rpc/eth/beacon/handlers_validators_test.go b/beacon-chain/rpc/eth/beacon/handlers_validators_test.go
index 1896c4696bb2..ecb6273bb287 100644
--- a/beacon-chain/rpc/eth/beacon/handlers_validators_test.go
+++ b/beacon-chain/rpc/eth/beacon/handlers_validators_test.go
@@ -1442,7 +1442,7 @@ func TestGetValidatorIdentities(t *testing.T) {
 			_, err := body.WriteString("[]")
 			require.NoError(t, err)
 			request := httptest.NewRequest(http.MethodPost, "http://example.com/eth/v1/beacon/states/{state_id}/validator_identities", &body)
-			request.Header.Set("Accept", api.OctetStreamMediaType)
+			request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 			request.SetPathValue("state_id", "head")
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
@@ -1466,7 +1466,7 @@ func TestGetValidatorIdentities(t *testing.T) {
 			_, err := body.WriteString("[\"0\",\"1\"]")
 			require.NoError(t, err)
 			request := httptest.NewRequest(http.MethodPost, "http://example.com/eth/v1/beacon/states/{state_id}/validator_identities", &body)
-			request.Header.Set("Accept", api.OctetStreamMediaType)
+			request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 			request.SetPathValue("state_id", "head")
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
@@ -1494,7 +1494,7 @@ func TestGetValidatorIdentities(t *testing.T) {
 			_, err := body.WriteString(fmt.Sprintf("[\"%s\",\"%s\"]", hexPubkey1, hexPubkey2))
 			require.NoError(t, err)
 			request := httptest.NewRequest(http.MethodPost, "http://example.com/eth/v1/beacon/states/{state_id}/validator_identities", &body)
-			request.Header.Set("Accept", api.OctetStreamMediaType)
+			request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 			request.SetPathValue("state_id", "head")
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
@@ -1521,7 +1521,7 @@ func TestGetValidatorIdentities(t *testing.T) {
 			_, err := body.WriteString(fmt.Sprintf("[\"%s\",\"1\"]", hexPubkey))
 			require.NoError(t, err)
 			request := httptest.NewRequest(http.MethodPost, "http://example.com/eth/v1/beacon/states/{state_id}/validator_identities", &body)
-			request.Header.Set("Accept", api.OctetStreamMediaType)
+			request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 			request.SetPathValue("state_id", "head")
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
@@ -1548,7 +1548,7 @@ func TestGetValidatorIdentities(t *testing.T) {
 			_, err := body.WriteString(fmt.Sprintf("[\"%s\",\"%s\"]", hexPubkey, hexutil.Encode([]byte(strings.Repeat("x", fieldparams.BLSPubkeyLength)))))
 			require.NoError(t, err)
 			request := httptest.NewRequest(http.MethodPost, "http://example.com/eth/v1/beacon/states/{state_id}/validator_identities", &body)
-			request.Header.Set("Accept", api.OctetStreamMediaType)
+			request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 			request.SetPathValue("state_id", "head")
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
@@ -1572,7 +1572,7 @@ func TestGetValidatorIdentities(t *testing.T) {
 			_, err := body.WriteString("[\"1\",\"99999\"]")
 			require.NoError(t, err)
 			request := httptest.NewRequest(http.MethodPost, "http://example.com/eth/v1/beacon/states/{state_id}/validator_identities", &body)
-			request.Header.Set("Accept", api.OctetStreamMediaType)
+			request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 			request.SetPathValue("state_id", "head")
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
diff --git a/beacon-chain/rpc/eth/blob/handlers.go b/beacon-chain/rpc/eth/blob/handlers.go
index b11fca3b8dd8..a061398b885b 100644
--- a/beacon-chain/rpc/eth/blob/handlers.go
+++ b/beacon-chain/rpc/eth/blob/handlers.go
@@ -68,7 +68,7 @@ func (s *Server) Blobs(w http.ResponseWriter, r *http.Request) {
 			httputil.HandleError(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
-		w.Header().Set(api.VersionHeader, version.String(blk.Version()))
+		w.Header().Set(api.EthConsensusVersionHeader, version.String(blk.Version()))
 		httputil.WriteSsz(w, sszResp)
 		return
 	}
@@ -91,7 +91,7 @@ func (s *Server) Blobs(w http.ResponseWriter, r *http.Request) {
 		ExecutionOptimistic: isOptimistic,
 		Finalized:           s.FinalizationFetcher.IsFinalized(ctx, blkRoot),
 	}
-	w.Header().Set(api.VersionHeader, version.String(blk.Version()))
+	w.Header().Set(api.EthConsensusVersionHeader, version.String(blk.Version()))
 	httputil.WriteJson(w, resp)
 }
 
@@ -180,7 +180,7 @@ func (s *Server) GetBlobs(w http.ResponseWriter, r *http.Request) {
 			copy(sszData[i*sszLen:(i+1)*sszLen], verifiedBlobs[i].Blob)
 		}
 
-		w.Header().Set(api.VersionHeader, version.String(blk.Version()))
+		w.Header().Set(api.EthConsensusVersionHeader, version.String(blk.Version()))
 		httputil.WriteSsz(w, sszData)
 		return
 	}
@@ -205,7 +205,7 @@ func (s *Server) GetBlobs(w http.ResponseWriter, r *http.Request) {
 		ExecutionOptimistic: isOptimistic,
 		Finalized:           s.FinalizationFetcher.IsFinalized(ctx, blkRoot),
 	}
-	w.Header().Set(api.VersionHeader, version.String(blk.Version()))
+	w.Header().Set(api.EthConsensusVersionHeader, version.String(blk.Version()))
 	httputil.WriteJson(w, resp)
 }
 
diff --git a/beacon-chain/rpc/eth/blob/handlers_test.go b/beacon-chain/rpc/eth/blob/handlers_test.go
index eca9a16b03be..ed4540f04037 100644
--- a/beacon-chain/rpc/eth/blob/handlers_test.go
+++ b/beacon-chain/rpc/eth/blob/handlers_test.go
@@ -227,7 +227,7 @@ func TestBlobs(t *testing.T) {
 		}
 		s.Blobs(writer, request)
 
-		assert.Equal(t, version.String(version.Deneb), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Deneb), writer.Header().Get(api.EthConsensusVersionHeader))
 		assert.Equal(t, http.StatusOK, writer.Code)
 		resp := &structs.SidecarsResponse{}
 		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), resp))
@@ -381,7 +381,7 @@ func TestBlobs(t *testing.T) {
 	t.Run("ssz", func(t *testing.T) {
 		u := "http://foo.example/finalized?indices=0"
 		request := httptest.NewRequest("GET", u, nil)
-		request.Header.Add("Accept", "application/octet-stream")
+		request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		s.Blocker = &lookup.BeaconDbBlocker{
@@ -393,7 +393,7 @@ func TestBlobs(t *testing.T) {
 			BlobStorage: bs,
 		}
 		s.Blobs(writer, request)
-		assert.Equal(t, version.String(version.Deneb), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Deneb), writer.Header().Get(api.EthConsensusVersionHeader))
 		assert.Equal(t, http.StatusOK, writer.Code)
 		require.Equal(t, len(writer.Body.Bytes()), fieldparams.BlobSidecarSize) // size of each sidecar
 		// can directly unmarshal to sidecar since there's only 1
@@ -404,7 +404,7 @@ func TestBlobs(t *testing.T) {
 	t.Run("ssz multiple blobs", func(t *testing.T) {
 		u := "http://foo.example/finalized"
 		request := httptest.NewRequest("GET", u, nil)
-		request.Header.Add("Accept", "application/octet-stream")
+		request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		s.Blocker = &lookup.BeaconDbBlocker{
@@ -467,7 +467,7 @@ func TestBlobs_Electra(t *testing.T) {
 		}
 		s.Blobs(writer, request)
 
-		assert.Equal(t, version.String(version.Electra), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Electra), writer.Header().Get(api.EthConsensusVersionHeader))
 		assert.Equal(t, http.StatusOK, writer.Code)
 		resp := &structs.SidecarsResponse{}
 		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), resp))
@@ -499,7 +499,7 @@ func TestBlobs_Electra(t *testing.T) {
 		}
 		s.Blobs(writer, request)
 
-		assert.Equal(t, version.String(version.Electra), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Electra), writer.Header().Get(api.EthConsensusVersionHeader))
 		assert.Equal(t, http.StatusOK, writer.Code)
 		resp := &structs.SidecarsResponse{}
 		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), resp))
@@ -867,7 +867,7 @@ func TestGetBlobs(t *testing.T) {
 	t.Run("ssz", func(t *testing.T) {
 		u := "http://foo.example/finalized"
 		request := httptest.NewRequest("GET", u, nil)
-		request.Header.Add("Accept", "application/octet-stream")
+		request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		s.Blocker = &lookup.BeaconDbBlocker{
@@ -879,7 +879,7 @@ func TestGetBlobs(t *testing.T) {
 			BlobStorage: bs,
 		}
 		s.GetBlobs(writer, request)
-		assert.Equal(t, version.String(version.Deneb), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Deneb), writer.Header().Get(api.EthConsensusVersionHeader))
 		assert.Equal(t, http.StatusOK, writer.Code)
 		require.Equal(t, fieldparams.BlobSize*4, len(writer.Body.Bytes())) // size of 4 sidecars
 		// unmarshal all 4 blobs
@@ -889,7 +889,7 @@ func TestGetBlobs(t *testing.T) {
 	t.Run("ssz multiple blobs", func(t *testing.T) {
 		u := "http://foo.example/finalized"
 		request := httptest.NewRequest("GET", u, nil)
-		request.Header.Add("Accept", "application/octet-stream")
+		request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		s.Blocker = &lookup.BeaconDbBlocker{
@@ -1038,7 +1038,7 @@ func TestGetBlobs(t *testing.T) {
 		}
 		s.GetBlobs(writer, request)
 
-		assert.Equal(t, version.String(version.Electra), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Electra), writer.Header().Get(api.EthConsensusVersionHeader))
 		assert.Equal(t, http.StatusOK, writer.Code)
 		resp := &structs.GetBlobsResponse{}
 		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), resp))
@@ -1078,7 +1078,7 @@ func TestGetBlobs(t *testing.T) {
 		}
 		s.GetBlobs(writer, request)
 
-		assert.Equal(t, version.String(version.Fulu), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Fulu), writer.Header().Get(api.EthConsensusVersionHeader))
 		assert.Equal(t, http.StatusOK, writer.Code)
 		resp := &structs.GetBlobsResponse{}
 		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), resp))
@@ -1132,7 +1132,7 @@ func TestGetBlobs(t *testing.T) {
 		}
 		s.GetBlobs(writer, request)
 
-		assert.Equal(t, version.String(version.Fulu), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Fulu), writer.Header().Get(api.EthConsensusVersionHeader))
 		assert.Equal(t, http.StatusOK, writer.Code)
 		resp := &structs.GetBlobsResponse{}
 		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), resp))
diff --git a/beacon-chain/rpc/eth/debug/handlers.go b/beacon-chain/rpc/eth/debug/handlers.go
index 4ba228f78603..77e1f818d387 100644
--- a/beacon-chain/rpc/eth/debug/handlers.go
+++ b/beacon-chain/rpc/eth/debug/handlers.go
@@ -129,7 +129,7 @@ func (s *Server) getBeaconStateV2(ctx context.Context, w http.ResponseWriter, id
 		Finalized:           isFinalized,
 		Data:                jsonBytes,
 	}
-	w.Header().Set(api.VersionHeader, ver)
+	w.Header().Set(api.EthConsensusVersionHeader, ver)
 	httputil.WriteJson(w, resp)
 }
 
@@ -145,7 +145,7 @@ func (s *Server) getBeaconStateSSZV2(ctx context.Context, w http.ResponseWriter,
 		httputil.HandleError(w, "Could not marshal state into SSZ: "+err.Error(), http.StatusInternalServerError)
 		return
 	}
-	w.Header().Set(api.VersionHeader, version.String(st.Version()))
+	w.Header().Set(api.EthConsensusVersionHeader, version.String(st.Version()))
 	httputil.WriteSsz(w, sszState)
 }
 
@@ -279,7 +279,7 @@ func (s *Server) DataColumnSidecars(w http.ResponseWriter, r *http.Request) {
 			httputil.HandleError(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
-		w.Header().Set(api.VersionHeader, version.String(blk.Version()))
+		w.Header().Set(api.EthConsensusVersionHeader, version.String(blk.Version()))
 		httputil.WriteSsz(w, sszResp)
 		return
 	}
@@ -302,7 +302,7 @@ func (s *Server) DataColumnSidecars(w http.ResponseWriter, r *http.Request) {
 		ExecutionOptimistic: isOptimistic,
 		Finalized:           s.FinalizationFetcher.IsFinalized(ctx, blkRoot),
 	}
-	w.Header().Set(api.VersionHeader, version.String(blk.Version()))
+	w.Header().Set(api.EthConsensusVersionHeader, version.String(blk.Version()))
 	httputil.WriteJson(w, resp)
 }
 
diff --git a/beacon-chain/rpc/eth/debug/handlers_test.go b/beacon-chain/rpc/eth/debug/handlers_test.go
index 082f7740047a..4c6d03c2b328 100644
--- a/beacon-chain/rpc/eth/debug/handlers_test.go
+++ b/beacon-chain/rpc/eth/debug/handlers_test.go
@@ -320,13 +320,13 @@ func TestGetBeaconStateSSZV2(t *testing.T) {
 
 		request := httptest.NewRequest(http.MethodGet, "http://example.com/eth/v2/debug/beacon/states/{state_id}", nil)
 		request.SetPathValue("state_id", "head")
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
 		s.GetBeaconStateV2(writer, request)
 		require.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, version.String(version.Phase0), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Phase0), writer.Header().Get(api.EthConsensusVersionHeader))
 		sszExpected, err := fakeState.MarshalSSZ()
 		require.NoError(t, err)
 		assert.DeepEqual(t, sszExpected, writer.Body.Bytes())
@@ -344,13 +344,13 @@ func TestGetBeaconStateSSZV2(t *testing.T) {
 
 		request := httptest.NewRequest(http.MethodGet, "http://example.com/eth/v2/debug/beacon/states/{state_id}", nil)
 		request.SetPathValue("state_id", "head")
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
 		s.GetBeaconStateV2(writer, request)
 		require.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, version.String(version.Altair), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Altair), writer.Header().Get(api.EthConsensusVersionHeader))
 		sszExpected, err := fakeState.MarshalSSZ()
 		require.NoError(t, err)
 		assert.DeepEqual(t, sszExpected, writer.Body.Bytes())
@@ -368,13 +368,13 @@ func TestGetBeaconStateSSZV2(t *testing.T) {
 
 		request := httptest.NewRequest(http.MethodGet, "http://example.com/eth/v2/debug/beacon/states/{state_id}", nil)
 		request.SetPathValue("state_id", "head")
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
 		s.GetBeaconStateV2(writer, request)
 		require.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, version.String(version.Bellatrix), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Bellatrix), writer.Header().Get(api.EthConsensusVersionHeader))
 		sszExpected, err := fakeState.MarshalSSZ()
 		require.NoError(t, err)
 		assert.DeepEqual(t, sszExpected, writer.Body.Bytes())
@@ -392,13 +392,13 @@ func TestGetBeaconStateSSZV2(t *testing.T) {
 
 		request := httptest.NewRequest(http.MethodGet, "http://example.com/eth/v2/debug/beacon/states/{state_id}", nil)
 		request.SetPathValue("state_id", "head")
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
 		s.GetBeaconStateV2(writer, request)
 		require.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, version.String(version.Capella), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Capella), writer.Header().Get(api.EthConsensusVersionHeader))
 		sszExpected, err := fakeState.MarshalSSZ()
 		require.NoError(t, err)
 		assert.DeepEqual(t, sszExpected, writer.Body.Bytes())
@@ -416,13 +416,13 @@ func TestGetBeaconStateSSZV2(t *testing.T) {
 
 		request := httptest.NewRequest(http.MethodGet, "http://example.com/eth/v2/debug/beacon/states/{state_id}", nil)
 		request.SetPathValue("state_id", "head")
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
 		s.GetBeaconStateV2(writer, request)
 		require.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, version.String(version.Deneb), writer.Header().Get(api.VersionHeader))
+		assert.Equal(t, version.String(version.Deneb), writer.Header().Get(api.EthConsensusVersionHeader))
 		sszExpected, err := fakeState.MarshalSSZ()
 		require.NoError(t, err)
 		assert.DeepEqual(t, sszExpected, writer.Body.Bytes())
diff --git a/beacon-chain/rpc/eth/events/http_test.go b/beacon-chain/rpc/eth/events/http_test.go
index d99c5092a49d..2a2716c72339 100644
--- a/beacon-chain/rpc/eth/events/http_test.go
+++ b/beacon-chain/rpc/eth/events/http_test.go
@@ -101,7 +101,7 @@ func (w *StreamingResponseWriterRecorder) RequireStatus(t *testing.T, status int
 }
 
 func (w *StreamingResponseWriterRecorder) Flush() {
-	w.WriteHeader(200)
+	w.WriteHeader(http.StatusOK)
 	fw, ok := w.ResponseWriter.(http.Flusher)
 	if ok {
 		fw.Flush()
diff --git a/beacon-chain/rpc/eth/light-client/BUILD.bazel b/beacon-chain/rpc/eth/light-client/BUILD.bazel
index 366eab820b9d..449868f7e57c 100644
--- a/beacon-chain/rpc/eth/light-client/BUILD.bazel
+++ b/beacon-chain/rpc/eth/light-client/BUILD.bazel
@@ -31,6 +31,7 @@ go_test(
     srcs = ["handlers_test.go"],
     embed = [":go_default_library"],
     deps = [
+        "//api:go_default_library",
         "//api/server/structs:go_default_library",
         "//async/event:go_default_library",
         "//beacon-chain/blockchain/testing:go_default_library",
diff --git a/beacon-chain/rpc/eth/light-client/handlers.go b/beacon-chain/rpc/eth/light-client/handlers.go
index 3f7655b5921d..dfb234d1422c 100644
--- a/beacon-chain/rpc/eth/light-client/handlers.go
+++ b/beacon-chain/rpc/eth/light-client/handlers.go
@@ -43,7 +43,7 @@ func (s *Server) GetLightClientBootstrap(w http.ResponseWriter, req *http.Reques
 		return
 	}
 
-	w.Header().Set(api.VersionHeader, version.String(bootstrap.Version()))
+	w.Header().Set(api.EthConsensusVersionHeader, version.String(bootstrap.Version()))
 
 	if httputil.RespondWithSsz(req) {
 		ssz, err := bootstrap.MarshalSSZ()
@@ -111,7 +111,7 @@ func (s *Server) GetLightClientUpdatesByRange(w http.ResponseWriter, req *http.R
 	}
 
 	if httputil.RespondWithSsz(req) {
-		w.Header().Set("Content-Type", "application/octet-stream")
+		w.Header().Set(api.ContentTypeHeader, api.OctetStreamMediaType)
 
 		for _, update := range updates {
 			if ctx.Err() != nil {
@@ -174,7 +174,7 @@ func (s *Server) GetLightClientFinalityUpdate(w http.ResponseWriter, req *http.R
 		return
 	}
 
-	w.Header().Set(api.VersionHeader, version.String(update.Version()))
+	w.Header().Set(api.EthConsensusVersionHeader, version.String(update.Version()))
 	if httputil.RespondWithSsz(req) {
 		data, err := update.MarshalSSZ()
 		if err != nil {
@@ -207,7 +207,7 @@ func (s *Server) GetLightClientOptimisticUpdate(w http.ResponseWriter, req *http
 		return
 	}
 
-	w.Header().Set(api.VersionHeader, version.String(update.Version()))
+	w.Header().Set(api.EthConsensusVersionHeader, version.String(update.Version()))
 	if httputil.RespondWithSsz(req) {
 		data, err := update.MarshalSSZ()
 		if err != nil {
diff --git a/beacon-chain/rpc/eth/light-client/handlers_test.go b/beacon-chain/rpc/eth/light-client/handlers_test.go
index 6c073bac6203..028bee32bb5e 100644
--- a/beacon-chain/rpc/eth/light-client/handlers_test.go
+++ b/beacon-chain/rpc/eth/light-client/handlers_test.go
@@ -11,6 +11,7 @@ import (
 	"strconv"
 	"testing"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	"github.com/OffchainLabs/prysm/v6/async/event"
 	blockchainTest "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
@@ -114,7 +115,7 @@ func TestLightClientHandler_GetLightClientBootstrap(t *testing.T) {
 			}
 			request := httptest.NewRequest("GET", "http://foo.com/", nil)
 			request.SetPathValue("block_root", hexutil.Encode(blockRoot[:]))
-			request.Header.Add("Accept", "application/octet-stream")
+			request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
 
@@ -235,7 +236,7 @@ func TestLightClientHandler_GetLightClientByRange(t *testing.T) {
 				t.Run("single update ssz", func(t *testing.T) {
 					url := fmt.Sprintf("http://foo.com/?count=1&start_period=%d", startPeriod)
 					request := httptest.NewRequest("GET", url, nil)
-					request.Header.Add("Accept", "application/octet-stream")
+					request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 					writer := httptest.NewRecorder()
 					writer.Body = &bytes.Buffer{}
 
@@ -290,7 +291,7 @@ func TestLightClientHandler_GetLightClientByRange(t *testing.T) {
 				t.Run("multiple updates ssz", func(t *testing.T) {
 					url := fmt.Sprintf("http://foo.com/?count=100&start_period=%d", startPeriod)
 					request := httptest.NewRequest("GET", url, nil)
-					request.Header.Add("Accept", "application/octet-stream")
+					request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 					writer := httptest.NewRecorder()
 					writer.Body = &bytes.Buffer{}
 
@@ -405,7 +406,7 @@ func TestLightClientHandler_GetLightClientByRange(t *testing.T) {
 				t.Run("ssz", func(t *testing.T) {
 					url := fmt.Sprintf("http://foo.com/?count=100&start_period=%d", startPeriod)
 					request := httptest.NewRequest("GET", url, nil)
-					request.Header.Add("Accept", "application/octet-stream")
+					request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 					writer := httptest.NewRecorder()
 					writer.Body = &bytes.Buffer{}
 
@@ -777,7 +778,7 @@ func TestLightClientHandler_GetLightClientFinalityUpdate(t *testing.T) {
 			s.LCStore.SetLastFinalityUpdate(update, false)
 
 			request := httptest.NewRequest("GET", "http://foo.com", nil)
-			request.Header.Add("Accept", "application/octet-stream")
+			request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
 			s.GetLightClientFinalityUpdate(writer, request)
@@ -870,7 +871,7 @@ func TestLightClientHandler_GetLightClientOptimisticUpdate(t *testing.T) {
 			s.LCStore.SetLastOptimisticUpdate(update, false)
 
 			request := httptest.NewRequest("GET", "http://foo.com", nil)
-			request.Header.Add("Accept", "application/octet-stream")
+			request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
 			s.GetLightClientOptimisticUpdate(writer, request)
diff --git a/beacon-chain/rpc/eth/validator/handlers.go b/beacon-chain/rpc/eth/validator/handlers.go
index 7be36698d730..1918d824d8cb 100644
--- a/beacon-chain/rpc/eth/validator/handlers.go
+++ b/beacon-chain/rpc/eth/validator/handlers.go
@@ -126,7 +126,7 @@ func (s *Server) GetAggregateAttestationV2(w http.ResponseWriter, r *http.Reques
 			}
 		}
 
-		w.Header().Set(api.VersionHeader, version.String(v))
+		w.Header().Set(api.EthConsensusVersionHeader, version.String(v))
 		httputil.WriteSsz(w, data)
 		return
 	}
@@ -159,7 +159,7 @@ func (s *Server) GetAggregateAttestationV2(w http.ResponseWriter, r *http.Reques
 		}
 		resp.Data = data
 	}
-	w.Header().Set(api.VersionHeader, version.String(v))
+	w.Header().Set(api.EthConsensusVersionHeader, version.String(v))
 	httputil.WriteJson(w, resp)
 }
 
@@ -357,9 +357,9 @@ func (s *Server) SubmitAggregateAndProofsV2(w http.ResponseWriter, r *http.Reque
 		return
 	}
 
-	versionHeader := r.Header.Get(api.VersionHeader)
+	versionHeader := r.Header.Get(api.EthConsensusVersionHeader)
 	if versionHeader == "" {
-		httputil.HandleError(w, api.VersionHeader+" header is required", http.StatusBadRequest)
+		httputil.HandleError(w, api.EthConsensusVersionHeader+" header is required", http.StatusBadRequest)
 		return
 	}
 	v, err := version.FromString(versionHeader)
diff --git a/beacon-chain/rpc/eth/validator/handlers_block.go b/beacon-chain/rpc/eth/validator/handlers_block.go
index df3543ae7ab9..737ceda0d34b 100644
--- a/beacon-chain/rpc/eth/validator/handlers_block.go
+++ b/beacon-chain/rpc/eth/validator/handlers_block.go
@@ -123,20 +123,20 @@ func (s *Server) produceBlockV3(ctx context.Context, w http.ResponseWriter, r *h
 		consensusBlockValue = "0"
 	}
 
-	w.Header().Set(api.ExecutionPayloadBlindedHeader, fmt.Sprintf("%v", v1alpha1resp.IsBlinded))
-	w.Header().Set(api.ExecutionPayloadValueHeader, v1alpha1resp.PayloadValue)
-	w.Header().Set(api.ConsensusBlockValueHeader, consensusBlockValue)
+	w.Header().Set(api.EthExecutionPayloadBlindedHeader, fmt.Sprintf("%v", v1alpha1resp.IsBlinded))
+	w.Header().Set(api.EthExecutionPayloadValueHeader, v1alpha1resp.PayloadValue)
+	w.Header().Set(api.EthConsensusBlockValueHeader, consensusBlockValue)
 
 	phase0Block, ok := v1alpha1resp.Block.(*eth.GenericBeaconBlock_Phase0)
 	if ok {
-		w.Header().Set(api.VersionHeader, version.String(version.Phase0))
+		w.Header().Set(api.EthConsensusVersionHeader, version.String(version.Phase0))
 		// rewards aren't used in phase 0
 		handleProducePhase0V3(w, isSSZ, phase0Block, v1alpha1resp.PayloadValue)
 		return
 	}
 	altairBlock, ok := v1alpha1resp.Block.(*eth.GenericBeaconBlock_Altair)
 	if ok {
-		w.Header().Set(api.VersionHeader, version.String(version.Altair))
+		w.Header().Set(api.EthConsensusVersionHeader, version.String(version.Altair))
 		handleProduceAltairV3(w, isSSZ, altairBlock, v1alpha1resp.PayloadValue, consensusBlockValue)
 		return
 	}
@@ -151,61 +151,61 @@ func (s *Server) produceBlockV3(ctx context.Context, w http.ResponseWriter, r *h
 	}
 	blindedBellatrixBlock, ok := v1alpha1resp.Block.(*eth.GenericBeaconBlock_BlindedBellatrix)
 	if ok {
-		w.Header().Set(api.VersionHeader, version.String(version.Bellatrix))
+		w.Header().Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 		handleProduceBlindedBellatrixV3(w, isSSZ, blindedBellatrixBlock, v1alpha1resp.PayloadValue, consensusBlockValue)
 		return
 	}
 	bellatrixBlock, ok := v1alpha1resp.Block.(*eth.GenericBeaconBlock_Bellatrix)
 	if ok {
-		w.Header().Set(api.VersionHeader, version.String(version.Bellatrix))
+		w.Header().Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 		handleProduceBellatrixV3(w, isSSZ, bellatrixBlock, v1alpha1resp.PayloadValue, consensusBlockValue)
 		return
 	}
 	blindedCapellaBlock, ok := v1alpha1resp.Block.(*eth.GenericBeaconBlock_BlindedCapella)
 	if ok {
-		w.Header().Set(api.VersionHeader, version.String(version.Capella))
+		w.Header().Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		handleProduceBlindedCapellaV3(w, isSSZ, blindedCapellaBlock, v1alpha1resp.PayloadValue, consensusBlockValue)
 		return
 	}
 	capellaBlock, ok := v1alpha1resp.Block.(*eth.GenericBeaconBlock_Capella)
 	if ok {
-		w.Header().Set(api.VersionHeader, version.String(version.Capella))
+		w.Header().Set(api.EthConsensusVersionHeader, version.String(version.Capella))
 		handleProduceCapellaV3(w, isSSZ, capellaBlock, v1alpha1resp.PayloadValue, consensusBlockValue)
 		return
 	}
 	blindedDenebBlockContents, ok := v1alpha1resp.Block.(*eth.GenericBeaconBlock_BlindedDeneb)
 	if ok {
-		w.Header().Set(api.VersionHeader, version.String(version.Deneb))
+		w.Header().Set(api.EthConsensusVersionHeader, version.String(version.Deneb))
 		handleProduceBlindedDenebV3(w, isSSZ, blindedDenebBlockContents, v1alpha1resp.PayloadValue, consensusBlockValue)
 		return
 	}
 	denebBlockContents, ok := v1alpha1resp.Block.(*eth.GenericBeaconBlock_Deneb)
 	if ok {
-		w.Header().Set(api.VersionHeader, version.String(version.Deneb))
+		w.Header().Set(api.EthConsensusVersionHeader, version.String(version.Deneb))
 		handleProduceDenebV3(w, isSSZ, denebBlockContents, v1alpha1resp.PayloadValue, consensusBlockValue)
 		return
 	}
 	blindedElectraBlockContents, ok := v1alpha1resp.Block.(*eth.GenericBeaconBlock_BlindedElectra)
 	if ok {
-		w.Header().Set(api.VersionHeader, version.String(version.Electra))
+		w.Header().Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 		handleProduceBlindedElectraV3(w, isSSZ, blindedElectraBlockContents, v1alpha1resp.PayloadValue, consensusBlockValue)
 		return
 	}
 	electraBlockContents, ok := v1alpha1resp.Block.(*eth.GenericBeaconBlock_Electra)
 	if ok {
-		w.Header().Set(api.VersionHeader, version.String(version.Electra))
+		w.Header().Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 		handleProduceElectraV3(w, isSSZ, electraBlockContents, v1alpha1resp.PayloadValue, consensusBlockValue)
 		return
 	}
 	blindedFuluBlockContents, ok := v1alpha1resp.Block.(*eth.GenericBeaconBlock_BlindedFulu)
 	if ok {
-		w.Header().Set(api.VersionHeader, version.String(version.Fulu))
+		w.Header().Set(api.EthConsensusVersionHeader, version.String(version.Fulu))
 		handleProduceBlindedFuluV3(w, isSSZ, blindedFuluBlockContents, v1alpha1resp.PayloadValue, consensusBlockValue)
 		return
 	}
 	fuluBlockContents, ok := v1alpha1resp.Block.(*eth.GenericBeaconBlock_Fulu)
 	if ok {
-		w.Header().Set(api.VersionHeader, version.String(version.Fulu))
+		w.Header().Set(api.EthConsensusVersionHeader, version.String(version.Fulu))
 		handleProduceFuluV3(w, isSSZ, fuluBlockContents, v1alpha1resp.PayloadValue, consensusBlockValue)
 		return
 	}
diff --git a/beacon-chain/rpc/eth/validator/handlers_block_test.go b/beacon-chain/rpc/eth/validator/handlers_block_test.go
index fabc1e1d05f2..01b2b86cb3eb 100644
--- a/beacon-chain/rpc/eth/validator/handlers_block_test.go
+++ b/beacon-chain/rpc/eth/validator/handlers_block_test.go
@@ -64,10 +64,10 @@ func TestProduceBlockV3(t *testing.T) {
 		want := fmt.Sprintf(`{"version":"phase0","execution_payload_blinded":false,"execution_payload_value":"","consensus_block_value":"","data":%s}`, string(jsonBytes))
 		body := strings.ReplaceAll(writer.Body.String(), "\n", "")
 		require.Equal(t, want, body)
-		require.Equal(t, "false", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "phase0", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "false", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "phase0", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Altair", func(t *testing.T) {
 		var block *structs.SignedBeaconBlockAltair
@@ -100,10 +100,10 @@ func TestProduceBlockV3(t *testing.T) {
 		want := fmt.Sprintf(`{"version":"altair","execution_payload_blinded":false,"execution_payload_value":"","consensus_block_value":"10000000000","data":%s}`, string(jsonBytes))
 		body := strings.ReplaceAll(writer.Body.String(), "\n", "")
 		require.Equal(t, want, body)
-		require.Equal(t, "false", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "altair", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "false", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "altair", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Bellatrix", func(t *testing.T) {
 		var block *structs.SignedBeaconBlockBellatrix
@@ -138,10 +138,10 @@ func TestProduceBlockV3(t *testing.T) {
 		want := fmt.Sprintf(`{"version":"bellatrix","execution_payload_blinded":false,"execution_payload_value":"2000","consensus_block_value":"10000000000","data":%s}`, string(jsonBytes))
 		body := strings.ReplaceAll(writer.Body.String(), "\n", "")
 		require.Equal(t, want, body)
-		require.Equal(t, "false", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "bellatrix", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "false", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "bellatrix", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("BlindedBellatrix", func(t *testing.T) {
 		var block *structs.SignedBlindedBeaconBlockBellatrix
@@ -176,10 +176,10 @@ func TestProduceBlockV3(t *testing.T) {
 		want := fmt.Sprintf(`{"version":"bellatrix","execution_payload_blinded":true,"execution_payload_value":"2000","consensus_block_value":"10000000000","data":%s}`, string(jsonBytes))
 		body := strings.ReplaceAll(writer.Body.String(), "\n", "")
 		require.Equal(t, want, body)
-		require.Equal(t, "true", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "bellatrix", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "true", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "bellatrix", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Capella", func(t *testing.T) {
 		var block *structs.SignedBeaconBlockCapella
@@ -214,10 +214,10 @@ func TestProduceBlockV3(t *testing.T) {
 		want := fmt.Sprintf(`{"version":"capella","execution_payload_blinded":false,"execution_payload_value":"2000","consensus_block_value":"10000000000","data":%s}`, string(jsonBytes))
 		body := strings.ReplaceAll(writer.Body.String(), "\n", "")
 		require.Equal(t, want, body)
-		require.Equal(t, "false", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "capella", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "false", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "capella", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Blinded Capella", func(t *testing.T) {
 		var block *structs.SignedBlindedBeaconBlockCapella
@@ -252,10 +252,10 @@ func TestProduceBlockV3(t *testing.T) {
 		want := fmt.Sprintf(`{"version":"capella","execution_payload_blinded":true,"execution_payload_value":"2000","consensus_block_value":"10000000000","data":%s}`, string(jsonBytes))
 		body := strings.ReplaceAll(writer.Body.String(), "\n", "")
 		require.Equal(t, want, body)
-		require.Equal(t, "true", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "capella", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "true", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "capella", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Deneb", func(t *testing.T) {
 		var block *structs.SignedBeaconBlockContentsDeneb
@@ -290,10 +290,10 @@ func TestProduceBlockV3(t *testing.T) {
 		want := fmt.Sprintf(`{"version":"deneb","execution_payload_blinded":false,"execution_payload_value":"2000","consensus_block_value":"10000000000","data":%s}`, string(jsonBytes))
 		body := strings.ReplaceAll(writer.Body.String(), "\n", "")
 		require.Equal(t, want, body)
-		require.Equal(t, "false", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "deneb", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "false", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "deneb", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Blinded Deneb", func(t *testing.T) {
 		var block *structs.SignedBlindedBeaconBlockDeneb
@@ -328,10 +328,10 @@ func TestProduceBlockV3(t *testing.T) {
 		want := fmt.Sprintf(`{"version":"deneb","execution_payload_blinded":true,"execution_payload_value":"2000","consensus_block_value":"10000000000","data":%s}`, string(jsonBytes))
 		body := strings.ReplaceAll(writer.Body.String(), "\n", "")
 		require.Equal(t, want, body)
-		require.Equal(t, "true", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "deneb", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "true", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "deneb", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Electra", func(t *testing.T) {
 		var block *structs.SignedBeaconBlockContentsElectra
@@ -366,10 +366,10 @@ func TestProduceBlockV3(t *testing.T) {
 		want := fmt.Sprintf(`{"version":"electra","execution_payload_blinded":false,"execution_payload_value":"2000","consensus_block_value":"10000000000","data":%s}`, string(jsonBytes))
 		body := strings.ReplaceAll(writer.Body.String(), "\n", "")
 		require.Equal(t, want, body)
-		require.Equal(t, "false", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "electra", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "false", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "electra", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Blinded Electra", func(t *testing.T) {
 		var block *structs.SignedBlindedBeaconBlockElectra
@@ -404,10 +404,10 @@ func TestProduceBlockV3(t *testing.T) {
 		want := fmt.Sprintf(`{"version":"electra","execution_payload_blinded":true,"execution_payload_value":"2000","consensus_block_value":"10000000000","data":%s}`, string(jsonBytes))
 		body := strings.ReplaceAll(writer.Body.String(), "\n", "")
 		require.Equal(t, want, body)
-		require.Equal(t, "true", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "electra", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "true", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "electra", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Fulu", func(t *testing.T) {
 		var block *structs.SignedBeaconBlockContentsFulu
@@ -442,10 +442,10 @@ func TestProduceBlockV3(t *testing.T) {
 		want := fmt.Sprintf(`{"version":"fulu","execution_payload_blinded":false,"execution_payload_value":"2000","consensus_block_value":"10000000000","data":%s}`, string(jsonBytes))
 		body := strings.ReplaceAll(writer.Body.String(), "\n", "")
 		require.Equal(t, want, body)
-		require.Equal(t, "false", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "fulu", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "false", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "fulu", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Blinded Fulu", func(t *testing.T) {
 		var block *structs.SignedBlindedBeaconBlockFulu
@@ -480,10 +480,10 @@ func TestProduceBlockV3(t *testing.T) {
 		want := fmt.Sprintf(`{"version":"fulu","execution_payload_blinded":true,"execution_payload_value":"2000","consensus_block_value":"10000000000","data":%s}`, string(jsonBytes))
 		body := strings.ReplaceAll(writer.Body.String(), "\n", "")
 		require.Equal(t, want, body)
-		require.Equal(t, "true", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "fulu", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "true", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "fulu", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("invalid query parameter slot empty", func(t *testing.T) {
 		v1alpha1Server := mock2.NewMockBeaconNodeValidatorServer(ctrl)
@@ -573,10 +573,10 @@ func TestProduceBlockV3(t *testing.T) {
 		want := fmt.Sprintf(`{"version":"fulu","execution_payload_blinded":false,"execution_payload_value":"2000","consensus_block_value":"0","data":%s}`, string(jsonBytes))
 		body := strings.ReplaceAll(writer.Body.String(), "\n", "")
 		require.Equal(t, want, body)
-		require.Equal(t, "false", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "fulu", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "0", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "false", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "fulu", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "0", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 }
 
@@ -611,7 +611,7 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 			SyncChecker:    syncChecker,
 		}
 		request := httptest.NewRequest(http.MethodGet, fmt.Sprintf("http://foo.example/eth/v3/validator/blocks/1?randao_reveal=%s&graffiti=%s", randao, graffiti), nil)
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.ProduceBlockV3(writer, request)
@@ -623,10 +623,10 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 		ssz, err := bl.Phase0.Block.MarshalSSZ()
 		require.NoError(t, err)
 		require.Equal(t, string(ssz), writer.Body.String())
-		require.Equal(t, "false", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "phase0", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "false", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "phase0", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Altair", func(t *testing.T) {
 		var block *structs.SignedBeaconBlockAltair
@@ -649,7 +649,7 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 			BlockRewardFetcher: rewardFetcher,
 		}
 		request := httptest.NewRequest(http.MethodGet, fmt.Sprintf("http://foo.example/eth/v3/validator/blocks/1?randao_reveal=%s&graffiti=%s", randao, graffiti), nil)
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.ProduceBlockV3(writer, request)
@@ -661,10 +661,10 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 		ssz, err := bl.Altair.Block.MarshalSSZ()
 		require.NoError(t, err)
 		require.Equal(t, string(ssz), writer.Body.String())
-		require.Equal(t, "false", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "altair", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "false", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "altair", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Bellatrix", func(t *testing.T) {
 		var block *structs.SignedBeaconBlockBellatrix
@@ -691,7 +691,7 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 			BlockRewardFetcher:    rewardFetcher,
 		}
 		request := httptest.NewRequest(http.MethodGet, fmt.Sprintf("http://foo.example/eth/v3/validator/blocks/1?randao_reveal=%s&graffiti=%s", randao, graffiti), nil)
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.ProduceBlockV3(writer, request)
@@ -703,10 +703,10 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 		ssz, err := bl.Bellatrix.Block.MarshalSSZ()
 		require.NoError(t, err)
 		require.Equal(t, string(ssz), writer.Body.String())
-		require.Equal(t, "false", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "bellatrix", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "false", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "bellatrix", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("BlindedBellatrix", func(t *testing.T) {
 		var block *structs.SignedBlindedBeaconBlockBellatrix
@@ -732,7 +732,7 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 			BlockRewardFetcher:    rewardFetcher,
 		}
 		request := httptest.NewRequest(http.MethodGet, fmt.Sprintf("http://foo.example/eth/v3/validator/blocks/1?randao_reveal=%s&graffiti=%s", randao, graffiti), nil)
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.ProduceBlockV3(writer, request)
@@ -744,10 +744,10 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 		ssz, err := bl.BlindedBellatrix.Block.MarshalSSZ()
 		require.NoError(t, err)
 		require.Equal(t, string(ssz), writer.Body.String())
-		require.Equal(t, "true", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "bellatrix", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "true", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "bellatrix", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Capella", func(t *testing.T) {
 		var block *structs.SignedBeaconBlockCapella
@@ -773,7 +773,7 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 			BlockRewardFetcher:    rewardFetcher,
 		}
 		request := httptest.NewRequest(http.MethodGet, fmt.Sprintf("http://foo.example/eth/v3/validator/blocks/1?randao_reveal=%s&graffiti=%s", randao, graffiti), nil)
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.ProduceBlockV3(writer, request)
@@ -785,10 +785,10 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 		ssz, err := bl.Capella.Block.MarshalSSZ()
 		require.NoError(t, err)
 		require.Equal(t, string(ssz), writer.Body.String())
-		require.Equal(t, "false", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "capella", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "false", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "capella", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Blinded Capella", func(t *testing.T) {
 		var block *structs.SignedBlindedBeaconBlockCapella
@@ -814,7 +814,7 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 			BlockRewardFetcher:    rewardFetcher,
 		}
 		request := httptest.NewRequest(http.MethodGet, fmt.Sprintf("http://foo.example/eth/v3/validator/blocks/1?randao_reveal=%s&graffiti=%s", randao, graffiti), nil)
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.ProduceBlockV3(writer, request)
@@ -826,10 +826,10 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 		ssz, err := bl.BlindedCapella.Block.MarshalSSZ()
 		require.NoError(t, err)
 		require.Equal(t, string(ssz), writer.Body.String())
-		require.Equal(t, "true", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "capella", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "true", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "capella", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Deneb", func(t *testing.T) {
 		var block *structs.SignedBeaconBlockContentsDeneb
@@ -855,7 +855,7 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 			BlockRewardFetcher:    rewardFetcher,
 		}
 		request := httptest.NewRequest(http.MethodGet, fmt.Sprintf("http://foo.example/eth/v3/validator/blocks/1?randao_reveal=%s&graffiti=%s", randao, graffiti), nil)
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.ProduceBlockV3(writer, request)
@@ -867,10 +867,10 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 		ssz, err := bl.Deneb.MarshalSSZ()
 		require.NoError(t, err)
 		require.Equal(t, string(ssz), writer.Body.String())
-		require.Equal(t, "false", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "deneb", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "false", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "deneb", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Blinded Deneb", func(t *testing.T) {
 		var block *structs.SignedBlindedBeaconBlockDeneb
@@ -896,7 +896,7 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 			BlockRewardFetcher:    rewardFetcher,
 		}
 		request := httptest.NewRequest(http.MethodGet, fmt.Sprintf("http://foo.example/eth/v3/validator/blocks/1?randao_reveal=%s&graffiti=%s", randao, graffiti), nil)
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.ProduceBlockV3(writer, request)
@@ -908,10 +908,10 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 		ssz, err := bl.BlindedDeneb.MarshalSSZ()
 		require.NoError(t, err)
 		require.Equal(t, string(ssz), writer.Body.String())
-		require.Equal(t, "true", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "deneb", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "true", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "deneb", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Electra", func(t *testing.T) {
 		var block *structs.SignedBeaconBlockContentsElectra
@@ -937,7 +937,7 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 			BlockRewardFetcher:    rewardFetcher,
 		}
 		request := httptest.NewRequest(http.MethodGet, fmt.Sprintf("http://foo.example/eth/v3/validator/blocks/1?randao_reveal=%s&graffiti=%s", randao, graffiti), nil)
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.ProduceBlockV3(writer, request)
@@ -949,10 +949,10 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 		ssz, err := bl.Electra.MarshalSSZ()
 		require.NoError(t, err)
 		require.Equal(t, string(ssz), writer.Body.String())
-		require.Equal(t, "false", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "electra", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "false", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "electra", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Blinded Electra", func(t *testing.T) {
 		var block *structs.SignedBlindedBeaconBlockElectra
@@ -978,7 +978,7 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 			BlockRewardFetcher:    rewardFetcher,
 		}
 		request := httptest.NewRequest(http.MethodGet, fmt.Sprintf("http://foo.example/eth/v3/validator/blocks/1?randao_reveal=%s&graffiti=%s", randao, graffiti), nil)
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.ProduceBlockV3(writer, request)
@@ -990,10 +990,10 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 		ssz, err := bl.BlindedElectra.MarshalSSZ()
 		require.NoError(t, err)
 		require.Equal(t, string(ssz), writer.Body.String())
-		require.Equal(t, "true", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "electra", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "true", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "electra", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Fulu", func(t *testing.T) {
 		var block *structs.SignedBeaconBlockContentsFulu
@@ -1019,7 +1019,7 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 			BlockRewardFetcher:    rewardFetcher,
 		}
 		request := httptest.NewRequest(http.MethodGet, fmt.Sprintf("http://foo.example/eth/v3/validator/blocks/1?randao_reveal=%s&graffiti=%s", randao, graffiti), nil)
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.ProduceBlockV3(writer, request)
@@ -1031,10 +1031,10 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 		ssz, err := bl.Fulu.MarshalSSZ()
 		require.NoError(t, err)
 		require.Equal(t, string(ssz), writer.Body.String())
-		require.Equal(t, "false", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "fulu", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "false", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "fulu", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("Blinded Fulu", func(t *testing.T) {
 		var block *structs.SignedBlindedBeaconBlockFulu
@@ -1060,7 +1060,7 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 			BlockRewardFetcher:    rewardFetcher,
 		}
 		request := httptest.NewRequest(http.MethodGet, fmt.Sprintf("http://foo.example/eth/v3/validator/blocks/1?randao_reveal=%s&graffiti=%s", randao, graffiti), nil)
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.ProduceBlockV3(writer, request)
@@ -1072,10 +1072,10 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 		ssz, err := bl.BlindedFulu.MarshalSSZ()
 		require.NoError(t, err)
 		require.Equal(t, string(ssz), writer.Body.String())
-		require.Equal(t, "true", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "fulu", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "10000000000", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "true", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "fulu", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "10000000000", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 	t.Run("0 block value is returned on error", func(t *testing.T) {
 		rewardFetcher := &rewardtesting.MockBlockRewardFetcher{Error: &httputil.DefaultJsonError{}}
@@ -1103,7 +1103,7 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 			BlockRewardFetcher:    rewardFetcher,
 		}
 		request := httptest.NewRequest(http.MethodGet, fmt.Sprintf("http://foo.example/eth/v3/validator/blocks/1?randao_reveal=%s&graffiti=%s", randao, graffiti), nil)
-		request.Header.Set("Accept", api.OctetStreamMediaType)
+		request.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 		server.ProduceBlockV3(writer, request)
@@ -1115,9 +1115,9 @@ func TestProduceBlockV3SSZ(t *testing.T) {
 		ssz, err := bl.Fulu.MarshalSSZ()
 		require.NoError(t, err)
 		require.Equal(t, string(ssz), writer.Body.String())
-		require.Equal(t, "false", writer.Header().Get(api.ExecutionPayloadBlindedHeader))
-		require.Equal(t, "2000", writer.Header().Get(api.ExecutionPayloadValueHeader))
-		require.Equal(t, "fulu", writer.Header().Get(api.VersionHeader))
-		require.Equal(t, "0", writer.Header().Get(api.ConsensusBlockValueHeader))
+		require.Equal(t, "false", writer.Header().Get(api.EthExecutionPayloadBlindedHeader))
+		require.Equal(t, "2000", writer.Header().Get(api.EthExecutionPayloadValueHeader))
+		require.Equal(t, "fulu", writer.Header().Get(api.EthConsensusVersionHeader))
+		require.Equal(t, "0", writer.Header().Get(api.EthConsensusBlockValueHeader))
 	})
 }
diff --git a/beacon-chain/rpc/eth/validator/handlers_test.go b/beacon-chain/rpc/eth/validator/handlers_test.go
index 3baba284b840..b2242a0f94f4 100644
--- a/beacon-chain/rpc/eth/validator/handlers_test.go
+++ b/beacon-chain/rpc/eth/validator/handlers_test.go
@@ -312,7 +312,7 @@ func TestGetAggregateAttestation(t *testing.T) {
 				attDataRoot := hexutil.Encode(reqRoot[:])
 				url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=2" + "&committee_index=0"
 				request := httptest.NewRequest(http.MethodGet, url, nil)
-				request.Header.Add("Accept", "application/octet-stream")
+				request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 				writer := httptest.NewRecorder()
 
 				s.GetAggregateAttestationV2(writer, request)
@@ -349,7 +349,7 @@ func TestGetAggregateAttestation(t *testing.T) {
 				attDataRoot := hexutil.Encode(reqRoot[:])
 				url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=1" + "&committee_index=0"
 				request := httptest.NewRequest(http.MethodGet, url, nil)
-				request.Header.Add("Accept", "application/octet-stream")
+				request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 				writer := httptest.NewRecorder()
 
 				s.GetAggregateAttestationV2(writer, request)
@@ -460,7 +460,7 @@ func TestGetAggregateAttestation(t *testing.T) {
 				attDataRoot := hexutil.Encode(reqRoot[:])
 				url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=2" + "&committee_index=0"
 				request := httptest.NewRequest(http.MethodGet, url, nil)
-				request.Header.Add("Accept", "application/octet-stream")
+				request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 				writer := httptest.NewRecorder()
 
 				s.GetAggregateAttestationV2(writer, request)
@@ -497,7 +497,7 @@ func TestGetAggregateAttestation(t *testing.T) {
 				attDataRoot := hexutil.Encode(reqRoot[:])
 				url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=1" + "&committee_index=0"
 				request := httptest.NewRequest(http.MethodGet, url, nil)
-				request.Header.Add("Accept", "application/octet-stream")
+				request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 				writer := httptest.NewRecorder()
 
 				s.GetAggregateAttestationV2(writer, request)
@@ -533,7 +533,7 @@ func TestGetAggregateAttestation(t *testing.T) {
 				attDataRoot := hexutil.Encode(reqRoot[:])
 				url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=4" + "&committee_index=0"
 				request := httptest.NewRequest(http.MethodGet, url, nil)
-				request.Header.Add("Accept", "application/octet-stream")
+				request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 				writer := httptest.NewRecorder()
 
 				s.GetAggregateAttestationV2(writer, request)
@@ -574,7 +574,7 @@ func TestGetAggregateAttestation(t *testing.T) {
 				attDataRoot := hexutil.Encode(reqRoot[:])
 				url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=3" + "&committee_index=0"
 				request := httptest.NewRequest(http.MethodGet, url, nil)
-				request.Header.Add("Accept", "application/octet-stream")
+				request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 				writer := httptest.NewRecorder()
 
 				s.GetAggregateAttestationV2(writer, request)
@@ -819,7 +819,7 @@ func TestSubmitAggregateAndProofs(t *testing.T) {
 			_, err := body.WriteString(singleAggregateElectra)
 			require.NoError(t, err)
 			request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-			request.Header.Set(api.VersionHeader, version.String(version.Electra))
+			request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
 
@@ -835,7 +835,7 @@ func TestSubmitAggregateAndProofs(t *testing.T) {
 			_, err := body.WriteString(singleAggregate)
 			require.NoError(t, err)
 			request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-			request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+			request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Phase0))
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
 
@@ -857,7 +857,7 @@ func TestSubmitAggregateAndProofs(t *testing.T) {
 			_, err := body.WriteString(multipleAggregatesElectra)
 			require.NoError(t, err)
 			request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-			request.Header.Set(api.VersionHeader, version.String(version.Electra))
+			request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
 
@@ -874,7 +874,7 @@ func TestSubmitAggregateAndProofs(t *testing.T) {
 			_, err := body.WriteString(multipleAggregates)
 			require.NoError(t, err)
 			request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-			request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+			request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Phase0))
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
 
@@ -892,7 +892,7 @@ func TestSubmitAggregateAndProofs(t *testing.T) {
 			_, err := body.WriteString(singleAggregate)
 			require.NoError(t, err)
 			request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-			request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+			request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Phase0))
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
 
@@ -907,7 +907,7 @@ func TestSubmitAggregateAndProofs(t *testing.T) {
 			_, err := body.WriteString(singleAggregateElectra)
 			require.NoError(t, err)
 			request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-			request.Header.Set(api.VersionHeader, version.String(version.Electra))
+			request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
 
@@ -919,7 +919,7 @@ func TestSubmitAggregateAndProofs(t *testing.T) {
 		})
 		t.Run("no body", func(t *testing.T) {
 			request := httptest.NewRequest(http.MethodPost, "http://example.com", nil)
-			request.Header.Set(api.VersionHeader, version.String(version.Electra))
+			request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
 
@@ -932,7 +932,7 @@ func TestSubmitAggregateAndProofs(t *testing.T) {
 		})
 		t.Run("no body-pre-electra", func(t *testing.T) {
 			request := httptest.NewRequest(http.MethodPost, "http://example.com", nil)
-			request.Header.Set(api.VersionHeader, version.String(version.Bellatrix))
+			request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Bellatrix))
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
 
@@ -948,7 +948,7 @@ func TestSubmitAggregateAndProofs(t *testing.T) {
 			_, err := body.WriteString("[]")
 			require.NoError(t, err)
 			request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-			request.Header.Set(api.VersionHeader, version.String(version.Electra))
+			request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
 
@@ -964,7 +964,7 @@ func TestSubmitAggregateAndProofs(t *testing.T) {
 			_, err := body.WriteString("[]")
 			require.NoError(t, err)
 			request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-			request.Header.Set(api.VersionHeader, version.String(version.Altair))
+			request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Altair))
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
 
@@ -980,7 +980,7 @@ func TestSubmitAggregateAndProofs(t *testing.T) {
 			_, err := body.WriteString(invalidAggregateElectra)
 			require.NoError(t, err)
 			request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-			request.Header.Set(api.VersionHeader, version.String(version.Electra))
+			request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Electra))
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
 
@@ -995,7 +995,7 @@ func TestSubmitAggregateAndProofs(t *testing.T) {
 			_, err := body.WriteString(invalidAggregate)
 			require.NoError(t, err)
 			request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-			request.Header.Set(api.VersionHeader, version.String(version.Deneb))
+			request.Header.Set(api.EthConsensusVersionHeader, version.String(version.Deneb))
 			writer := httptest.NewRecorder()
 			writer.Body = &bytes.Buffer{}
 
@@ -1461,7 +1461,7 @@ func TestGetAttestationData(t *testing.T) {
 
 		url := fmt.Sprintf("http://example.com?slot=%d&committee_index=%d", slot, 0)
 		request := httptest.NewRequest(http.MethodGet, url, nil)
-		request.Header.Add("Accept", "application/octet-stream")
+		request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
@@ -1780,7 +1780,7 @@ func TestGetAttestationData(t *testing.T) {
 
 		url := fmt.Sprintf("http://example.com?slot=%d&committee_index=%d", slot, 0)
 		request := httptest.NewRequest(http.MethodGet, url, nil)
-		request.Header.Add("Accept", "application/octet-stream")
+		request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
@@ -1969,7 +1969,7 @@ func TestGetAttestationData(t *testing.T) {
 
 		url := fmt.Sprintf("http://example.com?slot=%d&committee_index=%d", slot, 0)
 		request := httptest.NewRequest(http.MethodGet, url, nil)
-		request.Header.Add("Accept", "application/octet-stream")
+		request.Header.Add(api.AcceptHeader, api.OctetStreamMediaType)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
diff --git a/beacon-chain/rpc/prysm/beacon/BUILD.bazel b/beacon-chain/rpc/prysm/beacon/BUILD.bazel
index e4a36ab4ce25..a71e1e48ca35 100644
--- a/beacon-chain/rpc/prysm/beacon/BUILD.bazel
+++ b/beacon-chain/rpc/prysm/beacon/BUILD.bazel
@@ -45,6 +45,7 @@ go_test(
     ],
     embed = [":go_default_library"],
     deps = [
+        "//api:go_default_library",
         "//api/server/structs:go_default_library",
         "//beacon-chain/blockchain/testing:go_default_library",
         "//beacon-chain/core/helpers:go_default_library",
diff --git a/beacon-chain/rpc/prysm/beacon/handlers_test.go b/beacon-chain/rpc/prysm/beacon/handlers_test.go
index 6c10f0225849..2e832b3dc26b 100644
--- a/beacon-chain/rpc/prysm/beacon/handlers_test.go
+++ b/beacon-chain/rpc/prysm/beacon/handlers_test.go
@@ -10,6 +10,7 @@ import (
 	"net/http/httptest"
 	"testing"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	chainMock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
@@ -49,7 +50,7 @@ func individualVotesHelper(t *testing.T, request *structs.GetIndividualVotesRequ
 		&buf,
 	)
 	client := &http.Client{}
-	rawResp, err := client.Post(srv.URL, "application/json", req.Body)
+	rawResp, err := client.Post(srv.URL, api.JsonMediaType, req.Body)
 	require.NoError(t, err)
 	defer func() {
 		if err := rawResp.Body.Close(); err != nil {
diff --git a/beacon-chain/rpc/prysm/validator/BUILD.bazel b/beacon-chain/rpc/prysm/validator/BUILD.bazel
index b7bfa46a4f23..8b467e453440 100644
--- a/beacon-chain/rpc/prysm/validator/BUILD.bazel
+++ b/beacon-chain/rpc/prysm/validator/BUILD.bazel
@@ -34,6 +34,7 @@ go_test(
     ],
     embed = [":go_default_library"],
     deps = [
+        "//api:go_default_library",
         "//api/server/structs:go_default_library",
         "//beacon-chain/blockchain/testing:go_default_library",
         "//beacon-chain/core/altair:go_default_library",
diff --git a/beacon-chain/rpc/prysm/validator/validator_performance_test.go b/beacon-chain/rpc/prysm/validator/validator_performance_test.go
index 0420132692e3..17e48aae8bbb 100644
--- a/beacon-chain/rpc/prysm/validator/validator_performance_test.go
+++ b/beacon-chain/rpc/prysm/validator/validator_performance_test.go
@@ -9,6 +9,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	mock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/epoch/precompute"
@@ -38,7 +39,7 @@ func TestServer_GetValidatorPerformance(t *testing.T) {
 		req := httptest.NewRequest("POST", "/foo", nil)
 
 		client := &http.Client{}
-		rawResp, err := client.Post(srv.URL, "application/json", req.Body)
+		rawResp, err := client.Post(srv.URL, api.JsonMediaType, req.Body)
 		require.NoError(t, err)
 		require.Equal(t, http.StatusBadRequest, rawResp.StatusCode)
 	})
@@ -88,7 +89,7 @@ func TestServer_GetValidatorPerformance(t *testing.T) {
 		srv := httptest.NewServer(http.HandlerFunc(vs.GetPerformance))
 		req := httptest.NewRequest("POST", "/foo", &buf)
 		client := &http.Client{}
-		rawResp, err := client.Post(srv.URL, "application/json", req.Body)
+		rawResp, err := client.Post(srv.URL, api.JsonMediaType, req.Body)
 		require.NoError(t, err)
 		defer func() {
 			if err := rawResp.Body.Close(); err != nil {
@@ -153,7 +154,7 @@ func TestServer_GetValidatorPerformance(t *testing.T) {
 		srv := httptest.NewServer(http.HandlerFunc(vs.GetPerformance))
 		req := httptest.NewRequest("POST", "/foo", &buf)
 		client := &http.Client{}
-		rawResp, err := client.Post(srv.URL, "application/json", req.Body)
+		rawResp, err := client.Post(srv.URL, api.JsonMediaType, req.Body)
 		require.NoError(t, err)
 		defer func() {
 			if err := rawResp.Body.Close(); err != nil {
@@ -218,7 +219,7 @@ func TestServer_GetValidatorPerformance(t *testing.T) {
 		srv := httptest.NewServer(http.HandlerFunc(vs.GetPerformance))
 		req := httptest.NewRequest("POST", "/foo", &buf)
 		client := &http.Client{}
-		rawResp, err := client.Post(srv.URL, "application/json", req.Body)
+		rawResp, err := client.Post(srv.URL, api.JsonMediaType, req.Body)
 		require.NoError(t, err)
 		defer func() {
 			if err := rawResp.Body.Close(); err != nil {
@@ -280,7 +281,7 @@ func TestServer_GetValidatorPerformance(t *testing.T) {
 		srv := httptest.NewServer(http.HandlerFunc(vs.GetPerformance))
 		req := httptest.NewRequest("POST", "/foo", &buf)
 		client := &http.Client{}
-		rawResp, err := client.Post(srv.URL, "application/json", req.Body)
+		rawResp, err := client.Post(srv.URL, api.JsonMediaType, req.Body)
 		require.NoError(t, err)
 		defer func() {
 			if err := rawResp.Body.Close(); err != nil {
@@ -342,7 +343,7 @@ func TestServer_GetValidatorPerformance(t *testing.T) {
 		srv := httptest.NewServer(http.HandlerFunc(vs.GetPerformance))
 		req := httptest.NewRequest("POST", "/foo", &buf)
 		client := &http.Client{}
-		rawResp, err := client.Post(srv.URL, "application/json", req.Body)
+		rawResp, err := client.Post(srv.URL, api.JsonMediaType, req.Body)
 		require.NoError(t, err)
 		defer func() {
 			if err := rawResp.Body.Close(); err != nil {
@@ -404,7 +405,7 @@ func TestServer_GetValidatorPerformance(t *testing.T) {
 		srv := httptest.NewServer(http.HandlerFunc(vs.GetPerformance))
 		req := httptest.NewRequest("POST", "/foo", &buf)
 		client := &http.Client{}
-		rawResp, err := client.Post(srv.URL, "application/json", req.Body)
+		rawResp, err := client.Post(srv.URL, api.JsonMediaType, req.Body)
 		require.NoError(t, err)
 		defer func() {
 			if err := rawResp.Body.Close(); err != nil {
diff --git a/changelog/radek_header-consts.md b/changelog/radek_header-consts.md
new file mode 100644
index 000000000000..c9c7c8f4544b
--- /dev/null
+++ b/changelog/radek_header-consts.md
@@ -0,0 +1,3 @@
+### Ignored
+
+- Always use constants for API headers.
\ No newline at end of file
diff --git a/cmd/prysmctl/validator/BUILD.bazel b/cmd/prysmctl/validator/BUILD.bazel
index 8920247be1d2..72d960ec02a2 100644
--- a/cmd/prysmctl/validator/BUILD.bazel
+++ b/cmd/prysmctl/validator/BUILD.bazel
@@ -46,6 +46,7 @@ go_test(
     data = glob(["testdata/**"]),
     embed = [":go_default_library"],
     deps = [
+        "//api:go_default_library",
         "//api/server:go_default_library",
         "//api/server/structs:go_default_library",
         "//config/params:go_default_library",
diff --git a/cmd/prysmctl/validator/proposer_settings_test.go b/cmd/prysmctl/validator/proposer_settings_test.go
index d63d5b62f937..f16fcd13e410 100644
--- a/cmd/prysmctl/validator/proposer_settings_test.go
+++ b/cmd/prysmctl/validator/proposer_settings_test.go
@@ -11,6 +11,7 @@ import (
 	"strings"
 	"testing"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/validator/rpc"
@@ -23,8 +24,8 @@ func getValidatorHappyPathTestServer(t *testing.T) *httptest.Server {
 	key2 := "0x844ae9c6184d6edd46351b375f16f541b2d33b0ed0da9be4571b13938588aee840ba606a946f0e8023ae3a4b2a43b4d4"
 	address1 := "0xb698D697092822185bF0311052215d5B5e1F3944"
 	return httptest.NewUnstartedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.WriteHeader(200)
-		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		if r.Method == http.MethodGet {
 			if r.RequestURI == "/eth/v1/keystores" {
 				err := json.NewEncoder(w).Encode(&rpc.ListKeystoresResponse{
diff --git a/cmd/prysmctl/validator/withdraw_test.go b/cmd/prysmctl/validator/withdraw_test.go
index 1b8d040c493f..2027522ef3bb 100644
--- a/cmd/prysmctl/validator/withdraw_test.go
+++ b/cmd/prysmctl/validator/withdraw_test.go
@@ -11,6 +11,7 @@ import (
 	"path/filepath"
 	"testing"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/api/server"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	"github.com/OffchainLabs/prysm/v6/config/params"
@@ -23,8 +24,8 @@ import (
 
 func getHappyPathTestServer(file string, t *testing.T) *httptest.Server {
 	return httptest.NewUnstartedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.WriteHeader(200)
-		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		if r.Method == http.MethodGet {
 			fmt.Println(r.RequestURI)
 			if r.RequestURI == "/eth/v1/beacon/pool/bls_to_execution_changes" {
@@ -217,8 +218,8 @@ func TestCallWithdrawalEndpoint_Errors(t *testing.T) {
 	require.NoError(t, err)
 	srv := httptest.NewUnstartedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		if r.Method == http.MethodPost && r.RequestURI == "/eth/v1/beacon/pool/bls_to_execution_changes" {
-			w.WriteHeader(400)
-			w.Header().Set("Content-Type", "application/json")
+			w.WriteHeader(http.StatusBadRequest)
+			w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 			err = json.NewEncoder(w).Encode(&server.IndexedVerificationFailureError{
 				Failures: []*server.IndexedVerificationFailure{
 					{Index: 0, Message: "Could not validate SignedBLSToExecutionChange"},
@@ -227,8 +228,8 @@ func TestCallWithdrawalEndpoint_Errors(t *testing.T) {
 			require.NoError(t, err)
 		} else if r.Method == http.MethodGet {
 			if r.RequestURI == "/eth/v1/beacon/states/head/fork" {
-				w.WriteHeader(200)
-				w.Header().Set("Content-Type", "application/json")
+				w.WriteHeader(http.StatusOK)
+				w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 				err := json.NewEncoder(w).Encode(&structs.GetStateForkResponse{
 					Data: &structs.Fork{
 						PreviousVersion: hexutil.Encode(params.BeaconConfig().CapellaForkVersion),
@@ -240,8 +241,8 @@ func TestCallWithdrawalEndpoint_Errors(t *testing.T) {
 				})
 				require.NoError(t, err)
 			} else if r.RequestURI == "/eth/v1/config/spec" {
-				w.WriteHeader(200)
-				w.Header().Set("Content-Type", "application/json")
+				w.WriteHeader(http.StatusOK)
+				w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 				m := make(map[string]string)
 				m["CAPELLA_FORK_EPOCH"] = "1350"
 				err := json.NewEncoder(w).Encode(&structs.GetSpecResponse{
@@ -249,8 +250,8 @@ func TestCallWithdrawalEndpoint_Errors(t *testing.T) {
 				})
 				require.NoError(t, err)
 			} else {
-				w.WriteHeader(400)
-				w.Header().Set("Content-Type", "application/json")
+				w.WriteHeader(http.StatusBadRequest)
+				w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 			}
 		}
 	}))
@@ -283,8 +284,8 @@ func TestCallWithdrawalEndpoint_ForkBeforeCapella(t *testing.T) {
 	l, err := net.Listen("tcp", baseurl)
 	require.NoError(t, err)
 	srv := httptest.NewUnstartedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.WriteHeader(200)
-		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		if r.RequestURI == "/eth/v1/beacon/states/head/fork" {
 
 			err := json.NewEncoder(w).Encode(&structs.GetStateForkResponse{
@@ -332,8 +333,8 @@ func TestVerifyWithdrawal_Multiple(t *testing.T) {
 	l, err := net.Listen("tcp", baseurl)
 	require.NoError(t, err)
 	srv := httptest.NewUnstartedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.WriteHeader(200)
-		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		if r.Method == http.MethodGet {
 			b, err := os.ReadFile(filepath.Clean(file))
 			require.NoError(t, err)
diff --git a/config/BUILD.bazel b/config/BUILD.bazel
index a9057b4ecf3a..67457431b8d3 100644
--- a/config/BUILD.bazel
+++ b/config/BUILD.bazel
@@ -20,6 +20,7 @@ go_library(
     importpath = "github.com/OffchainLabs/prysm/v6/config",
     visibility = ["//visibility:public"],
     deps = [
+        "//api:go_default_library",
         "@com_github_ethereum_go_ethereum//common:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
         "@com_github_sirupsen_logrus//:go_default_library",
diff --git a/config/proposer/loader/BUILD.bazel b/config/proposer/loader/BUILD.bazel
index b0cc09e51ed6..a5dcc53e3641 100644
--- a/config/proposer/loader/BUILD.bazel
+++ b/config/proposer/loader/BUILD.bazel
@@ -7,6 +7,7 @@ go_test(
     data = glob(["testdata/**"]),
     embed = [":go_default_library"],
     deps = [
+        "//api:go_default_library",
         "//cmd/validator/flags:go_default_library",
         "//config/fieldparams:go_default_library",
         "//config/params:go_default_library",
diff --git a/config/proposer/loader/loader_test.go b/config/proposer/loader/loader_test.go
index 2043b4bc25b4..753148d5fc90 100644
--- a/config/proposer/loader/loader_test.go
+++ b/config/proposer/loader/loader_test.go
@@ -8,6 +8,7 @@ import (
 	"os"
 	"testing"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/cmd/validator/flags"
 	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
 	"github.com/OffchainLabs/prysm/v6/config/params"
@@ -907,8 +908,8 @@ func TestProposerSettingsLoader(t *testing.T) {
 					content, err := os.ReadFile(tt.args.proposerSettingsFlagValues.url)
 					require.NoError(t, err)
 					srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-						w.WriteHeader(200)
-						w.Header().Set("Content-Type", "application/json")
+						w.WriteHeader(http.StatusOK)
+						w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 						_, err := fmt.Fprintf(w, "%s", content)
 						require.NoError(t, err)
 					}))
diff --git a/config/util.go b/config/util.go
index 6c69aecfe86e..4564cff18105 100644
--- a/config/util.go
+++ b/config/util.go
@@ -10,6 +10,7 @@ import (
 	"os"
 	"path/filepath"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
@@ -28,7 +29,7 @@ func UnmarshalFromURL(ctx context.Context, from string, to interface{}) error {
 	if err != nil {
 		return errors.Wrap(err, "failed to create http request")
 	}
-	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set(api.ContentTypeHeader, api.JsonMediaType)
 	resp, err := http.DefaultClient.Do(req)
 	if err != nil {
 		return errors.Wrap(err, "failed to send http request")
diff --git a/monitoring/clientstats/BUILD.bazel b/monitoring/clientstats/BUILD.bazel
index cd165bce5d7a..66ba67d9914a 100644
--- a/monitoring/clientstats/BUILD.bazel
+++ b/monitoring/clientstats/BUILD.bazel
@@ -11,6 +11,7 @@ go_library(
     importpath = "github.com/OffchainLabs/prysm/v6/monitoring/clientstats",
     visibility = ["//visibility:public"],
     deps = [
+        "//api:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "@com_github_prometheus_client_model//go:go_default_library",
         "@com_github_prometheus_prom2json//:go_default_library",
diff --git a/monitoring/clientstats/updaters.go b/monitoring/clientstats/updaters.go
index 19bedd6eaf4d..4468999a94e4 100644
--- a/monitoring/clientstats/updaters.go
+++ b/monitoring/clientstats/updaters.go
@@ -5,6 +5,8 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+
+	"github.com/OffchainLabs/prysm/v6/api"
 )
 
 type genericWriter struct {
@@ -30,7 +32,7 @@ type httpPoster struct {
 }
 
 func (gw *httpPoster) Update(r io.Reader) error {
-	resp, err := gw.client.Post(gw.url, "application/json", r)
+	resp, err := gw.client.Post(gw.url, api.JsonMediaType, r)
 	if err != nil {
 		return err
 	}
diff --git a/monitoring/prometheus/BUILD.bazel b/monitoring/prometheus/BUILD.bazel
index 7809130de145..0250c4f348a3 100644
--- a/monitoring/prometheus/BUILD.bazel
+++ b/monitoring/prometheus/BUILD.bazel
@@ -11,6 +11,7 @@ go_library(
     importpath = "github.com/OffchainLabs/prysm/v6/monitoring/prometheus",
     visibility = ["//visibility:public"],
     deps = [
+        "//api:go_default_library",
         "//runtime:go_default_library",
         "@com_github_golang_gddo//httputil:go_default_library",
         "@com_github_prometheus_client_golang//prometheus:go_default_library",
@@ -29,6 +30,7 @@ go_test(
     ],
     embed = [":go_default_library"],
     deps = [
+        "//api:go_default_library",
         "//runtime:go_default_library",
         "//testing/assert:go_default_library",
         "//testing/require:go_default_library",
diff --git a/monitoring/prometheus/content_negotiation.go b/monitoring/prometheus/content_negotiation.go
index 0b49e6ab3d20..5f7e4b7918f1 100644
--- a/monitoring/prometheus/content_negotiation.go
+++ b/monitoring/prometheus/content_negotiation.go
@@ -6,14 +6,10 @@ import (
 	"fmt"
 	"net/http"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/golang/gddo/httputil"
 )
 
-const (
-	contentTypePlainText = "text/plain"
-	contentTypeJSON      = "application/json"
-)
-
 // generatedResponse is a container for response output.
 type generatedResponse struct {
 	// Err is protocol error, if any.
@@ -26,16 +22,16 @@ type generatedResponse struct {
 // negotiateContentType parses "Accept:" header and returns preferred content type string.
 func negotiateContentType(r *http.Request) string {
 	contentTypes := []string{
-		contentTypePlainText,
-		contentTypeJSON,
+		api.PlainMediaType,
+		api.JsonMediaType,
 	}
-	return httputil.NegotiateContentType(r, contentTypes, contentTypePlainText)
+	return httputil.NegotiateContentType(r, contentTypes, api.PlainMediaType)
 }
 
 // writeResponse is content-type aware response writer.
 func writeResponse(w http.ResponseWriter, r *http.Request, response generatedResponse) error {
 	switch negotiateContentType(r) {
-	case contentTypePlainText:
+	case api.PlainMediaType:
 		buf, ok := response.Data.(bytes.Buffer)
 		if !ok {
 			return fmt.Errorf("unexpected data: %v", response.Data)
@@ -43,8 +39,8 @@ func writeResponse(w http.ResponseWriter, r *http.Request, response generatedRes
 		if _, err := w.Write(buf.Bytes()); err != nil {
 			return fmt.Errorf("could not write response body: %w", err)
 		}
-	case contentTypeJSON:
-		w.Header().Set("Content-Type", contentTypeJSON)
+	case api.JsonMediaType:
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		if err := json.NewEncoder(w).Encode(response); err != nil {
 			return err
 		}
diff --git a/monitoring/prometheus/service.go b/monitoring/prometheus/service.go
index 2c683559c9d5..e4c56838d9a5 100644
--- a/monitoring/prometheus/service.go
+++ b/monitoring/prometheus/service.go
@@ -12,6 +12,7 @@ import (
 	"runtime/pprof"
 	"time"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/runtime"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
@@ -91,7 +92,7 @@ func (s *Service) healthzHandler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	// Handle plain text content.
-	if contentType := negotiateContentType(r); contentType == contentTypePlainText {
+	if contentType := negotiateContentType(r); contentType == api.PlainMediaType {
 		var buf bytes.Buffer
 		for _, s := range statuses {
 			var status string
diff --git a/monitoring/prometheus/service_test.go b/monitoring/prometheus/service_test.go
index 3087ab3baa3a..117cec08e80c 100644
--- a/monitoring/prometheus/service_test.go
+++ b/monitoring/prometheus/service_test.go
@@ -11,6 +11,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/runtime"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
@@ -130,7 +131,7 @@ func TestContentNegotiation(t *testing.T) {
 		}
 
 		// Request response as JSON.
-		req.Header.Add("Accept", "application/json, */*;q=0.5")
+		req.Header.Add(api.AcceptHeader, "application/json, */*;q=0.5")
 		rr = httptest.NewRecorder()
 		handler.ServeHTTP(rr, req)
 
@@ -161,7 +162,7 @@ func TestContentNegotiation(t *testing.T) {
 		}
 
 		// Request response as JSON.
-		req.Header.Add("Accept", "application/json, */*;q=0.5")
+		req.Header.Add(api.AcceptHeader, "application/json, */*;q=0.5")
 		rr = httptest.NewRecorder()
 		handler.ServeHTTP(rr, req)
 
diff --git a/network/BUILD.bazel b/network/BUILD.bazel
index f6cfeeeed9c2..a3003c55db58 100644
--- a/network/BUILD.bazel
+++ b/network/BUILD.bazel
@@ -10,6 +10,7 @@ go_library(
     importpath = "github.com/OffchainLabs/prysm/v6/network",
     visibility = ["//visibility:public"],
     deps = [
+        "//api:go_default_library",
         "//network/authorization:go_default_library",
         "@com_github_ethereum_go_ethereum//rpc:go_default_library",
         "@com_github_golang_jwt_jwt_v4//:go_default_library",
@@ -28,6 +29,7 @@ go_test(
     ],
     embed = [":go_default_library"],
     deps = [
+        "//api:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//network/authorization:go_default_library",
         "//testing/assert:go_default_library",
diff --git a/network/auth.go b/network/auth.go
index a17f81d7ab15..f0e47bcfa743 100644
--- a/network/auth.go
+++ b/network/auth.go
@@ -1,9 +1,11 @@
 package network
 
 import (
+	"fmt"
 	"net/http"
 	"time"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/golang-jwt/jwt/v4"
 	"github.com/pkg/errors"
 )
@@ -47,6 +49,6 @@ func (t *jwtTransport) RoundTrip(req *http.Request) (*http.Response, error) {
 	if err != nil {
 		return nil, errors.Wrap(err, "could not produce signed JWT token")
 	}
-	req.Header.Set("Authorization", "Bearer "+tokenString)
+	req.Header.Set(api.AuthorizationHeader, fmt.Sprintf("%s %s", api.BearerAuthorization, tokenString))
 	return t.underlyingTransport.RoundTrip(req)
 }
diff --git a/network/auth_test.go b/network/auth_test.go
index 8ec5ce862151..dd22892de81f 100644
--- a/network/auth_test.go
+++ b/network/auth_test.go
@@ -7,6 +7,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/golang-jwt/jwt/v4"
@@ -23,8 +24,8 @@ func TestJWTAuthTransport(t *testing.T) {
 		Transport: authTransport,
 	}
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		reqToken := r.Header.Get("Authorization")
-		splitToken := strings.Split(reqToken, "Bearer")
+		reqToken := r.Header.Get(api.AuthorizationHeader)
+		splitToken := strings.Split(reqToken, api.BearerAuthorization)
 		// The format should be `Bearer ${token}`.
 		require.Equal(t, 2, len(splitToken))
 		reqToken = strings.TrimSpace(splitToken[1])
@@ -65,8 +66,8 @@ func TestJWTWithId(t *testing.T) {
 		Transport: authTransport,
 	}
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		reqToken := r.Header.Get("Authorization")
-		splitToken := strings.Split(reqToken, "Bearer")
+		reqToken := r.Header.Get(api.AuthorizationHeader)
+		splitToken := strings.Split(reqToken, api.BearerAuthorization)
 		// The format should be `Bearer ${token}`.
 		require.Equal(t, 2, len(splitToken))
 		reqToken = strings.TrimSpace(splitToken[1])
@@ -109,8 +110,8 @@ func TestJWTWithoutId(t *testing.T) {
 		Transport: authTransport,
 	}
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		reqToken := r.Header.Get("Authorization")
-		splitToken := strings.Split(reqToken, "Bearer")
+		reqToken := r.Header.Get(api.AuthorizationHeader)
+		splitToken := strings.Split(reqToken, api.BearerAuthorization)
 		// The format should be `Bearer ${token}`.
 		require.Equal(t, 2, len(splitToken))
 		reqToken = strings.TrimSpace(splitToken[1])
diff --git a/network/endpoint.go b/network/endpoint.go
index 16e04a56ad7b..10aa8d90099f 100644
--- a/network/endpoint.go
+++ b/network/endpoint.go
@@ -9,6 +9,7 @@ import (
 	"net/url"
 	"strings"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/network/authorization"
 	gethRPC "github.com/ethereum/go-ethereum/rpc"
 	log "github.com/sirupsen/logrus"
@@ -51,9 +52,9 @@ func (d *AuthorizationData) Equals(other AuthorizationData) bool {
 func (d *AuthorizationData) ToHeaderValue() (string, error) {
 	switch d.Method {
 	case authorization.Basic:
-		return "Basic " + d.Value, nil
+		return fmt.Sprintf("%s %s", api.BasicAuthorization, d.Value), nil
 	case authorization.Bearer:
-		return "Bearer " + d.Value, nil
+		return fmt.Sprintf("%s %s", api.BearerAuthorization, d.Value), nil
 	case authorization.None:
 		return "", nil
 	}
@@ -103,10 +104,10 @@ func HttpEndpoint(eth1Provider string) Endpoint {
 
 // Method returns the authorizationmethod.AuthorizationMethod corresponding with the parameter value.
 func Method(auth string) authorization.Method {
-	if strings.HasPrefix(strings.ToLower(auth), "basic") {
+	if strings.HasPrefix(strings.ToLower(auth), strings.ToLower(api.BasicAuthorization)) {
 		return authorization.Basic
 	}
-	if strings.HasPrefix(strings.ToLower(auth), "bearer") {
+	if strings.HasPrefix(strings.ToLower(auth), strings.ToLower(api.BearerAuthorization)) {
 		return authorization.Bearer
 	}
 	return authorization.None
diff --git a/network/httputil/reader.go b/network/httputil/reader.go
index e13ef2b62694..df6768cdbe82 100644
--- a/network/httputil/reader.go
+++ b/network/httputil/reader.go
@@ -14,7 +14,7 @@ var priorityRegex = regexp.MustCompile(`q=(\d+(?:\.\d+)?)`)
 
 // RespondWithSsz takes a http request and checks to see if it should be requesting a ssz response.
 func RespondWithSsz(req *http.Request) bool {
-	accept := req.Header.Values("Accept")
+	accept := req.Header.Values(api.AcceptHeader)
 	if len(accept) == 0 {
 		return false
 	}
@@ -54,5 +54,5 @@ func RespondWithSsz(req *http.Request) bool {
 
 // IsRequestSsz checks if the request object should be interpreted as ssz
 func IsRequestSsz(req *http.Request) bool {
-	return req.Header.Get("Content-Type") == api.OctetStreamMediaType
+	return req.Header.Get(api.ContentTypeHeader) == api.OctetStreamMediaType
 }
diff --git a/network/httputil/reader_test.go b/network/httputil/reader_test.go
index 828a9bbbb9ca..79c9ac6bb188 100644
--- a/network/httputil/reader_test.go
+++ b/network/httputil/reader_test.go
@@ -15,42 +15,42 @@ import (
 func TestRespondWithSsz(t *testing.T) {
 	t.Run("ssz_requested", func(t *testing.T) {
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example", nil)
-		request.Header["Accept"] = []string{api.OctetStreamMediaType}
+		request.Header[api.AcceptHeader] = []string{api.OctetStreamMediaType}
 		result := RespondWithSsz(request)
 		assert.Equal(t, true, result)
 	})
 
 	t.Run("ssz_content_type_first", func(t *testing.T) {
 		request := httptest.NewRequest("GET", "http://foo.example", nil)
-		request.Header["Accept"] = []string{fmt.Sprintf("%s,%s", api.OctetStreamMediaType, api.JsonMediaType)}
+		request.Header[api.AcceptHeader] = []string{fmt.Sprintf("%s,%s", api.OctetStreamMediaType, api.JsonMediaType)}
 		result := RespondWithSsz(request)
 		assert.Equal(t, true, result)
 	})
 
 	t.Run("ssz_content_type_preferred_1", func(t *testing.T) {
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example", nil)
-		request.Header["Accept"] = []string{fmt.Sprintf("%s;q=0.9,%s", api.JsonMediaType, api.OctetStreamMediaType)}
+		request.Header[api.AcceptHeader] = []string{fmt.Sprintf("%s;q=0.9,%s", api.JsonMediaType, api.OctetStreamMediaType)}
 		result := RespondWithSsz(request)
 		assert.Equal(t, true, result)
 	})
 
 	t.Run("ssz_content_type_preferred_2", func(t *testing.T) {
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example", nil)
-		request.Header["Accept"] = []string{fmt.Sprintf("%s;q=0.95,%s;q=0.9", api.OctetStreamMediaType, api.JsonMediaType)}
+		request.Header[api.AcceptHeader] = []string{fmt.Sprintf("%s;q=0.95,%s;q=0.9", api.OctetStreamMediaType, api.JsonMediaType)}
 		result := RespondWithSsz(request)
 		assert.Equal(t, true, result)
 	})
 
 	t.Run("other_content_type_preferred", func(t *testing.T) {
 		request := httptest.NewRequest("GET", "http://foo.example", nil)
-		request.Header["Accept"] = []string{fmt.Sprintf("%s,%s;q=0.9", api.JsonMediaType, api.OctetStreamMediaType)}
+		request.Header[api.AcceptHeader] = []string{fmt.Sprintf("%s,%s;q=0.9", api.JsonMediaType, api.OctetStreamMediaType)}
 		result := RespondWithSsz(request)
 		assert.Equal(t, false, result)
 	})
 
 	t.Run("other_params", func(t *testing.T) {
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example", nil)
-		request.Header["Accept"] = []string{fmt.Sprintf("%s,%s;q=0.9,otherparam=xyz", api.JsonMediaType, api.OctetStreamMediaType)}
+		request.Header[api.AcceptHeader] = []string{fmt.Sprintf("%s,%s;q=0.9,otherparam=xyz", api.JsonMediaType, api.OctetStreamMediaType)}
 		result := RespondWithSsz(request)
 		assert.Equal(t, false, result)
 	})
@@ -63,28 +63,28 @@ func TestRespondWithSsz(t *testing.T) {
 
 	t.Run("empty_header", func(t *testing.T) {
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example", nil)
-		request.Header["Accept"] = []string{}
+		request.Header[api.AcceptHeader] = []string{}
 		result := RespondWithSsz(request)
 		assert.Equal(t, false, result)
 	})
 
 	t.Run("empty_header_value", func(t *testing.T) {
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example", nil)
-		request.Header["Accept"] = []string{""}
+		request.Header[api.AcceptHeader] = []string{""}
 		result := RespondWithSsz(request)
 		assert.Equal(t, false, result)
 	})
 
 	t.Run("other_content_type", func(t *testing.T) {
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example", nil)
-		request.Header["Accept"] = []string{"application/other"}
+		request.Header[api.AcceptHeader] = []string{"application/other"}
 		result := RespondWithSsz(request)
 		assert.Equal(t, false, result)
 	})
 
 	t.Run("garbage", func(t *testing.T) {
 		request := httptest.NewRequest(http.MethodGet, "http://foo.example", nil)
-		request.Header["Accept"] = []string{"This is Sparta!!!"}
+		request.Header[api.AcceptHeader] = []string{"This is Sparta!!!"}
 		result := RespondWithSsz(request)
 		assert.Equal(t, false, result)
 	})
@@ -96,7 +96,7 @@ func TestIsRequestSsz(t *testing.T) {
 		_, err := body.WriteString("something")
 		require.NoError(t, err)
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", &body)
-		request.Header["Content-Type"] = []string{api.OctetStreamMediaType}
+		request.Header[api.ContentTypeHeader] = []string{api.OctetStreamMediaType}
 		result := IsRequestSsz(request)
 		assert.Equal(t, true, result)
 	})
@@ -109,14 +109,14 @@ func TestIsRequestSsz(t *testing.T) {
 
 	t.Run("ssz Post wrong content type", func(t *testing.T) {
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", nil)
-		request.Header["Content-Type"] = []string{"application/other"}
+		request.Header[api.ContentTypeHeader] = []string{"application/other"}
 		result := IsRequestSsz(request)
 		assert.Equal(t, false, result)
 	})
 
 	t.Run("ssz Post json content type", func(t *testing.T) {
 		request := httptest.NewRequest(http.MethodPost, "http://foo.example", nil)
-		request.Header["Content-Type"] = []string{api.JsonMediaType}
+		request.Header[api.ContentTypeHeader] = []string{api.JsonMediaType}
 		result := IsRequestSsz(request)
 		assert.Equal(t, false, result)
 	})
diff --git a/network/httputil/writer.go b/network/httputil/writer.go
index a025728da244..95ab6c9eba1c 100644
--- a/network/httputil/writer.go
+++ b/network/httputil/writer.go
@@ -32,7 +32,7 @@ func (e *DefaultJsonError) Error() string {
 
 // WriteJson writes the response message in JSON format.
 func WriteJson(w http.ResponseWriter, v any) {
-	w.Header().Set("Content-Type", api.JsonMediaType)
+	w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 	w.WriteHeader(http.StatusOK)
 	if err := json.NewEncoder(w).Encode(v); err != nil {
 		log.WithError(err).Error("Could not write response message")
@@ -41,8 +41,8 @@ func WriteJson(w http.ResponseWriter, v any) {
 
 // WriteSsz writes the response message in ssz format
 func WriteSsz(w http.ResponseWriter, respSsz []byte) {
-	w.Header().Set("Content-Length", strconv.Itoa(len(respSsz)))
-	w.Header().Set("Content-Type", api.OctetStreamMediaType)
+	w.Header().Set(api.ContentLengthHeader, strconv.Itoa(len(respSsz)))
+	w.Header().Set(api.ContentTypeHeader, api.OctetStreamMediaType)
 	if _, err := io.Copy(w, io.NopCloser(bytes.NewReader(respSsz))); err != nil {
 		log.WithError(err).Error("Could not write response message")
 	}
@@ -55,8 +55,8 @@ func WriteError(w http.ResponseWriter, errJson HasStatusCode) {
 		log.WithError(err).Error("Could not marshal error message")
 		return
 	}
-	w.Header().Set("Content-Length", strconv.Itoa(len(j)))
-	w.Header().Set("Content-Type", api.JsonMediaType)
+	w.Header().Set(api.ContentLengthHeader, strconv.Itoa(len(j)))
+	w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 	w.WriteHeader(errJson.StatusCode())
 	if _, err := io.Copy(w, io.NopCloser(bytes.NewReader(j))); err != nil {
 		log.WithError(err).Error("Could not write error message")
diff --git a/testing/endtoend/evaluators/beaconapi/util.go b/testing/endtoend/evaluators/beaconapi/util.go
index 565bcb22e6db..8163822facc1 100644
--- a/testing/endtoend/evaluators/beaconapi/util.go
+++ b/testing/endtoend/evaluators/beaconapi/util.go
@@ -48,7 +48,7 @@ func doJSONGETRequest(template, requestPath string, beaconNodeIdx int, resp inte
 
 	var body interface{}
 	if httpResp.StatusCode != http.StatusOK {
-		if httpResp.Header.Get("Content-Type") == api.JsonMediaType {
+		if httpResp.Header.Get(api.ContentTypeHeader) == api.JsonMediaType {
 			if err = json.NewDecoder(httpResp.Body).Decode(&body); err != nil {
 				return errors.Wrap(err, "failed to decode response body")
 			}
@@ -89,7 +89,7 @@ func doSSZGETRequest(template, requestPath string, beaconNodeIdx int, bnType ...
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to build request")
 	}
-	req.Header.Set("Accept", "application/octet-stream")
+	req.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 	resp, err := http.DefaultClient.Do(req)
 	if err != nil {
 		return nil, errors.Wrap(err, "request failed")
@@ -132,7 +132,7 @@ func doJSONPOSTRequest(template, requestPath string, beaconNodeIdx int, postObj,
 	}
 	httpResp, err := http.Post(
 		basePath+requestPath,
-		"application/json",
+		api.JsonMediaType,
 		bytes.NewBuffer(b),
 	)
 	if err != nil {
@@ -141,7 +141,7 @@ func doJSONPOSTRequest(template, requestPath string, beaconNodeIdx int, postObj,
 
 	var body interface{}
 	if httpResp.StatusCode != http.StatusOK {
-		if httpResp.Header.Get("Content-Type") == api.JsonMediaType {
+		if httpResp.Header.Get(api.ContentTypeHeader) == api.JsonMediaType {
 			if err = json.NewDecoder(httpResp.Body).Decode(&body); err != nil {
 				return errors.Wrap(err, "failed to decode response body")
 			}
@@ -186,8 +186,8 @@ func doSSZPOSTRequest(template, requestPath string, beaconNodeIdx int, postObj i
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to build request")
 	}
-	req.Header.Set("Content-Type", "application/json")
-	req.Header.Set("Accept", "application/octet-stream")
+	req.Header.Set(api.ContentTypeHeader, api.JsonMediaType)
+	req.Header.Set(api.AcceptHeader, api.OctetStreamMediaType)
 	resp, err := http.DefaultClient.Do(req)
 	if err != nil {
 		return nil, errors.Wrap(err, "request failed")
diff --git a/testing/middleware/builder/BUILD.bazel b/testing/middleware/builder/BUILD.bazel
index 0c34a097b910..c4c6103e2cc7 100644
--- a/testing/middleware/builder/BUILD.bazel
+++ b/testing/middleware/builder/BUILD.bazel
@@ -9,6 +9,7 @@ go_library(
     importpath = "github.com/OffchainLabs/prysm/v6/testing/middleware/builder",
     visibility = ["//visibility:public"],
     deps = [
+        "//api:go_default_library",
         "//api/client/builder:go_default_library",
         "//api/server/structs:go_default_library",
         "//beacon-chain/core/signing:go_default_library",
diff --git a/testing/middleware/builder/builder.go b/testing/middleware/builder/builder.go
index 048baf54c1e2..cf1a41e0c5ee 100644
--- a/testing/middleware/builder/builder.go
+++ b/testing/middleware/builder/builder.go
@@ -14,6 +14,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	builderAPI "github.com/OffchainLabs/prysm/v6/api/client/builder"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing"
@@ -884,9 +885,9 @@ func (p *Builder) sendHttpRequest(req *http.Request, requestBytes []byte) (*http
 	proxyReq.Body = io.NopCloser(bytes.NewBuffer(requestBytes))
 
 	// Required proxy headers for forwarding JSON-RPC requests to the execution client.
-	proxyReq.Header.Set("Host", req.Host)
+	proxyReq.Header.Set(api.HostHeader, req.Host)
 	proxyReq.Header.Set("X-Forwarded-For", req.RemoteAddr)
-	proxyReq.Header.Set("Content-Type", "application/json")
+	proxyReq.Header.Set(api.ContentTypeHeader, api.JsonMediaType)
 
 	client := &http.Client{}
 	if p.cfg.secret != "" {
diff --git a/testing/middleware/engine-api-proxy/BUILD.bazel b/testing/middleware/engine-api-proxy/BUILD.bazel
index fdd48d6ba844..03cbb2e36601 100644
--- a/testing/middleware/engine-api-proxy/BUILD.bazel
+++ b/testing/middleware/engine-api-proxy/BUILD.bazel
@@ -9,6 +9,7 @@ go_library(
     importpath = "github.com/OffchainLabs/prysm/v6/testing/middleware/engine-api-proxy",
     visibility = ["//visibility:public"],
     deps = [
+        "//api:go_default_library",
         "//network:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
         "@com_github_sirupsen_logrus//:go_default_library",
@@ -20,6 +21,7 @@ go_test(
     srcs = ["proxy_test.go"],
     embed = [":go_default_library"],
     deps = [
+        "//api:go_default_library",
         "//crypto/rand:go_default_library",
         "//proto/engine/v1:go_default_library",
         "//testing/require:go_default_library",
diff --git a/testing/middleware/engine-api-proxy/proxy.go b/testing/middleware/engine-api-proxy/proxy.go
index 01b5fe2b3d4d..96d479b8c70d 100644
--- a/testing/middleware/engine-api-proxy/proxy.go
+++ b/testing/middleware/engine-api-proxy/proxy.go
@@ -15,6 +15,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/network"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
@@ -242,9 +243,9 @@ func (p *Proxy) sendHttpRequest(req *http.Request, requestBytes []byte) (*http.R
 	proxyReq.Body = io.NopCloser(bytes.NewBuffer(requestBytes))
 
 	// Required proxy headers for forwarding JSON-RPC requests to the execution client.
-	proxyReq.Header.Set("Host", req.Host)
+	proxyReq.Header.Set(api.HostHeader, req.Host)
 	proxyReq.Header.Set("X-Forwarded-For", req.RemoteAddr)
-	proxyReq.Header.Set("Content-Type", "application/json")
+	proxyReq.Header.Set(api.ContentTypeHeader, api.JsonMediaType)
 
 	client := &http.Client{}
 	if p.cfg.secret != "" {
diff --git a/testing/middleware/engine-api-proxy/proxy_test.go b/testing/middleware/engine-api-proxy/proxy_test.go
index f59bae092882..fdc658cf57bd 100644
--- a/testing/middleware/engine-api-proxy/proxy_test.go
+++ b/testing/middleware/engine-api-proxy/proxy_test.go
@@ -7,6 +7,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/crypto/rand"
 	pb "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
@@ -297,7 +298,7 @@ func Test_isEngineAPICall(t *testing.T) {
 
 func destinationServerSetup(t *testing.T, response interface{}) *httptest.Server {
 	return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		defer func() {
 			require.NoError(t, r.Body.Close())
 		}()
diff --git a/validator/client/beacon-api/get_beacon_block.go b/validator/client/beacon-api/get_beacon_block.go
index ef17b363d820..f4b5b85cb711 100644
--- a/validator/client/beacon-api/get_beacon_block.go
+++ b/validator/client/beacon-api/get_beacon_block.go
@@ -30,12 +30,12 @@ func (c *beaconApiValidatorClient) beaconBlock(ctx context.Context, slot primiti
 	if err != nil {
 		return nil, err
 	}
-	if strings.Contains(header.Get("Content-Type"), api.OctetStreamMediaType) {
-		ver, err := version.FromString(header.Get(api.VersionHeader))
+	if strings.Contains(header.Get(api.ContentTypeHeader), api.OctetStreamMediaType) {
+		ver, err := version.FromString(header.Get(api.EthConsensusVersionHeader))
 		if err != nil {
-			return nil, errors.Wrap(err, fmt.Sprintf("unsupported header version %s", header.Get(api.VersionHeader)))
+			return nil, errors.Wrap(err, fmt.Sprintf("unsupported header version %s", header.Get(api.EthConsensusVersionHeader)))
 		}
-		isBlindedRaw := header.Get(api.ExecutionPayloadBlindedHeader)
+		isBlindedRaw := header.Get(api.EthExecutionPayloadBlindedHeader)
 		isBlinded, err := strconv.ParseBool(isBlindedRaw)
 		if err != nil {
 			return nil, err
diff --git a/validator/client/beacon-api/get_beacon_block_test.go b/validator/client/beacon-api/get_beacon_block_test.go
index 9ce5fc2401c3..d2dc622a91d7 100644
--- a/validator/client/beacon-api/get_beacon_block_test.go
+++ b/validator/client/beacon-api/get_beacon_block_test.go
@@ -155,7 +155,7 @@ func TestGetBeaconBlock_Error(t *testing.T) {
 				gomock.Any(),
 			).Return(
 				b,
-				http.Header{"Content-Type": []string{"application/json"}},
+				http.Header{api.ContentTypeHeader: []string{api.JsonMediaType}},
 				nil,
 			).Times(1)
 
@@ -191,7 +191,7 @@ func TestGetBeaconBlock_Phase0Valid(t *testing.T) {
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
 		b,
-		http.Header{"Content-Type": []string{"application/json"}},
+		http.Header{api.ContentTypeHeader: []string{api.JsonMediaType}},
 		nil,
 	).Times(1)
 
@@ -231,9 +231,9 @@ func TestGetBeaconBlock_SSZ_BellatrixValid(t *testing.T) {
 	).Return(
 		bytes,
 		http.Header{
-			"Content-Type":                    []string{api.OctetStreamMediaType},
-			api.VersionHeader:                 []string{"bellatrix"},
-			api.ExecutionPayloadBlindedHeader: []string{"false"},
+			api.ContentTypeHeader:                []string{api.OctetStreamMediaType},
+			api.EthConsensusVersionHeader:        []string{"bellatrix"},
+			api.EthExecutionPayloadBlindedHeader: []string{"false"},
 		},
 		nil,
 	).Times(1)
@@ -273,9 +273,9 @@ func TestGetBeaconBlock_SSZ_BlindedBellatrixValid(t *testing.T) {
 	).Return(
 		bytes,
 		http.Header{
-			"Content-Type":                    []string{api.OctetStreamMediaType},
-			api.VersionHeader:                 []string{"bellatrix"},
-			api.ExecutionPayloadBlindedHeader: []string{"true"},
+			api.ContentTypeHeader:                []string{api.OctetStreamMediaType},
+			api.EthConsensusVersionHeader:        []string{"bellatrix"},
+			api.EthExecutionPayloadBlindedHeader: []string{"true"},
 		},
 		nil,
 	).Times(1)
@@ -315,9 +315,9 @@ func TestGetBeaconBlock_SSZ_CapellaValid(t *testing.T) {
 	).Return(
 		bytes,
 		http.Header{
-			"Content-Type":                    []string{api.OctetStreamMediaType},
-			api.VersionHeader:                 []string{"capella"},
-			api.ExecutionPayloadBlindedHeader: []string{"false"},
+			api.ContentTypeHeader:                []string{api.OctetStreamMediaType},
+			api.EthConsensusVersionHeader:        []string{"capella"},
+			api.EthExecutionPayloadBlindedHeader: []string{"false"},
 		},
 		nil,
 	).Times(1)
@@ -357,9 +357,9 @@ func TestGetBeaconBlock_SSZ_BlindedCapellaValid(t *testing.T) {
 	).Return(
 		bytes,
 		http.Header{
-			"Content-Type":                    []string{api.OctetStreamMediaType},
-			api.VersionHeader:                 []string{"capella"},
-			api.ExecutionPayloadBlindedHeader: []string{"true"},
+			api.ContentTypeHeader:                []string{api.OctetStreamMediaType},
+			api.EthConsensusVersionHeader:        []string{"capella"},
+			api.EthExecutionPayloadBlindedHeader: []string{"true"},
 		},
 		nil,
 	).Times(1)
@@ -399,9 +399,9 @@ func TestGetBeaconBlock_SSZ_DenebValid(t *testing.T) {
 	).Return(
 		bytes,
 		http.Header{
-			"Content-Type":                    []string{api.OctetStreamMediaType},
-			api.VersionHeader:                 []string{"deneb"},
-			api.ExecutionPayloadBlindedHeader: []string{"false"},
+			api.ContentTypeHeader:                []string{api.OctetStreamMediaType},
+			api.EthConsensusVersionHeader:        []string{"deneb"},
+			api.EthExecutionPayloadBlindedHeader: []string{"false"},
 		},
 		nil,
 	).Times(1)
@@ -441,9 +441,9 @@ func TestGetBeaconBlock_SSZ_BlindedDenebValid(t *testing.T) {
 	).Return(
 		bytes,
 		http.Header{
-			"Content-Type":                    []string{api.OctetStreamMediaType},
-			api.VersionHeader:                 []string{"deneb"},
-			api.ExecutionPayloadBlindedHeader: []string{"true"},
+			api.ContentTypeHeader:                []string{api.OctetStreamMediaType},
+			api.EthConsensusVersionHeader:        []string{"deneb"},
+			api.EthExecutionPayloadBlindedHeader: []string{"true"},
 		},
 		nil,
 	).Times(1)
@@ -483,9 +483,9 @@ func TestGetBeaconBlock_SSZ_ElectraValid(t *testing.T) {
 	).Return(
 		bytes,
 		http.Header{
-			"Content-Type":                    []string{api.OctetStreamMediaType},
-			api.VersionHeader:                 []string{"electra"},
-			api.ExecutionPayloadBlindedHeader: []string{"false"},
+			api.ContentTypeHeader:                []string{api.OctetStreamMediaType},
+			api.EthConsensusVersionHeader:        []string{"electra"},
+			api.EthExecutionPayloadBlindedHeader: []string{"false"},
 		},
 		nil,
 	).Times(1)
@@ -525,9 +525,9 @@ func TestGetBeaconBlock_SSZ_BlindedElectraValid(t *testing.T) {
 	).Return(
 		bytes,
 		http.Header{
-			"Content-Type":                    []string{api.OctetStreamMediaType},
-			api.VersionHeader:                 []string{"electra"},
-			api.ExecutionPayloadBlindedHeader: []string{"true"},
+			api.ContentTypeHeader:                []string{api.OctetStreamMediaType},
+			api.EthConsensusVersionHeader:        []string{"electra"},
+			api.EthExecutionPayloadBlindedHeader: []string{"true"},
 		},
 		nil,
 	).Times(1)
@@ -563,9 +563,9 @@ func TestGetBeaconBlock_SSZ_UnsupportedVersion(t *testing.T) {
 	).Return(
 		[]byte{},
 		http.Header{
-			"Content-Type":                    []string{api.OctetStreamMediaType},
-			api.VersionHeader:                 []string{"unsupported"},
-			api.ExecutionPayloadBlindedHeader: []string{"false"},
+			api.ContentTypeHeader:                []string{api.OctetStreamMediaType},
+			api.EthConsensusVersionHeader:        []string{"unsupported"},
+			api.EthExecutionPayloadBlindedHeader: []string{"false"},
 		},
 		nil,
 	).Times(1)
@@ -596,9 +596,9 @@ func TestGetBeaconBlock_SSZ_InvalidBlindedHeader(t *testing.T) {
 	).Return(
 		bytes,
 		http.Header{
-			"Content-Type":                    []string{api.OctetStreamMediaType},
-			api.VersionHeader:                 []string{"bellatrix"},
-			api.ExecutionPayloadBlindedHeader: []string{"invalid"},
+			api.ContentTypeHeader:                []string{api.OctetStreamMediaType},
+			api.EthConsensusVersionHeader:        []string{"bellatrix"},
+			api.EthExecutionPayloadBlindedHeader: []string{"invalid"},
 		},
 		nil,
 	).Times(1)
@@ -629,9 +629,9 @@ func TestGetBeaconBlock_SSZ_InvalidVersionHeader(t *testing.T) {
 	).Return(
 		bytes,
 		http.Header{
-			"Content-Type":                    []string{api.OctetStreamMediaType},
-			api.VersionHeader:                 []string{"invalid"},
-			api.ExecutionPayloadBlindedHeader: []string{"false"},
+			api.ContentTypeHeader:                []string{api.OctetStreamMediaType},
+			api.EthConsensusVersionHeader:        []string{"invalid"},
+			api.EthExecutionPayloadBlindedHeader: []string{"false"},
 		},
 		nil,
 	).Times(1)
@@ -687,9 +687,9 @@ func TestGetBeaconBlock_SSZ_Phase0Valid(t *testing.T) {
 	).Return(
 		bytes,
 		http.Header{
-			"Content-Type":                    []string{api.OctetStreamMediaType},
-			api.VersionHeader:                 []string{"phase0"},
-			api.ExecutionPayloadBlindedHeader: []string{"false"},
+			api.ContentTypeHeader:                []string{api.OctetStreamMediaType},
+			api.EthConsensusVersionHeader:        []string{"phase0"},
+			api.EthExecutionPayloadBlindedHeader: []string{"false"},
 		},
 		nil,
 	).Times(1)
@@ -729,9 +729,9 @@ func TestGetBeaconBlock_SSZ_AltairValid(t *testing.T) {
 	).Return(
 		bytes,
 		http.Header{
-			"Content-Type":                    []string{api.OctetStreamMediaType},
-			api.VersionHeader:                 []string{"altair"},
-			api.ExecutionPayloadBlindedHeader: []string{"false"},
+			api.ContentTypeHeader:                []string{api.OctetStreamMediaType},
+			api.EthConsensusVersionHeader:        []string{"altair"},
+			api.EthExecutionPayloadBlindedHeader: []string{"false"},
 		},
 		nil,
 	).Times(1)
@@ -776,7 +776,7 @@ func TestGetBeaconBlock_AltairValid(t *testing.T) {
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
 		b,
-		http.Header{"Content-Type": []string{"application/json"}},
+		http.Header{api.ContentTypeHeader: []string{api.JsonMediaType}},
 		nil,
 	).Times(1)
 
@@ -820,7 +820,7 @@ func TestGetBeaconBlock_BellatrixValid(t *testing.T) {
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
 		b,
-		http.Header{"Content-Type": []string{"application/json"}},
+		http.Header{api.ContentTypeHeader: []string{api.JsonMediaType}},
 		nil,
 	).Times(1)
 
@@ -865,7 +865,7 @@ func TestGetBeaconBlock_BlindedBellatrixValid(t *testing.T) {
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
 		b,
-		http.Header{"Content-Type": []string{"application/json"}},
+		http.Header{api.ContentTypeHeader: []string{api.JsonMediaType}},
 		nil,
 	).Times(1)
 
@@ -910,7 +910,7 @@ func TestGetBeaconBlock_CapellaValid(t *testing.T) {
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
 		b,
-		http.Header{"Content-Type": []string{"application/json"}},
+		http.Header{api.ContentTypeHeader: []string{api.JsonMediaType}},
 		nil,
 	).Times(1)
 
@@ -955,7 +955,7 @@ func TestGetBeaconBlock_BlindedCapellaValid(t *testing.T) {
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
 		b,
-		http.Header{"Content-Type": []string{"application/json"}},
+		http.Header{api.ContentTypeHeader: []string{api.JsonMediaType}},
 		nil,
 	).Times(1)
 
@@ -1000,7 +1000,7 @@ func TestGetBeaconBlock_DenebValid(t *testing.T) {
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
 		b,
-		http.Header{"Content-Type": []string{"application/json"}},
+		http.Header{api.ContentTypeHeader: []string{api.JsonMediaType}},
 		nil,
 	).Times(1)
 
@@ -1045,7 +1045,7 @@ func TestGetBeaconBlock_BlindedDenebValid(t *testing.T) {
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
 		b,
-		http.Header{"Content-Type": []string{"application/json"}},
+		http.Header{api.ContentTypeHeader: []string{api.JsonMediaType}},
 		nil,
 	).Times(1)
 
@@ -1090,7 +1090,7 @@ func TestGetBeaconBlock_ElectraValid(t *testing.T) {
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
 		b,
-		http.Header{"Content-Type": []string{"application/json"}},
+		http.Header{api.ContentTypeHeader: []string{api.JsonMediaType}},
 		nil,
 	).Times(1)
 
@@ -1135,7 +1135,7 @@ func TestGetBeaconBlock_BlindedElectraValid(t *testing.T) {
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
 		b,
-		http.Header{"Content-Type": []string{"application/json"}},
+		http.Header{api.ContentTypeHeader: []string{api.JsonMediaType}},
 		nil,
 	).Times(1)
 
diff --git a/validator/client/beacon-api/propose_attestation.go b/validator/client/beacon-api/propose_attestation.go
index 6127603db8b5..296564c6ff9d 100644
--- a/validator/client/beacon-api/propose_attestation.go
+++ b/validator/client/beacon-api/propose_attestation.go
@@ -6,6 +6,7 @@ import (
 	"encoding/json"
 	"net/http"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/network/httputil"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
@@ -22,7 +23,7 @@ func (c *beaconApiValidatorClient) proposeAttestation(ctx context.Context, attes
 		return nil, err
 	}
 
-	headers := map[string]string{"Eth-Consensus-Version": version.String(attestation.Version())}
+	headers := map[string]string{api.EthConsensusVersionHeader: version.String(attestation.Version())}
 	err = c.jsonRestHandler.Post(
 		ctx,
 		"/eth/v2/beacon/pool/attestations",
@@ -67,7 +68,7 @@ func (c *beaconApiValidatorClient) proposeAttestationElectra(ctx context.Context
 	if err != nil {
 		return nil, err
 	}
-	headers := map[string]string{"Eth-Consensus-Version": version.String(attestation.Version())}
+	headers := map[string]string{api.EthConsensusVersionHeader: version.String(attestation.Version())}
 	if err = c.jsonRestHandler.Post(
 		ctx,
 		"/eth/v2/beacon/pool/attestations",
diff --git a/validator/client/beacon-api/propose_attestation_test.go b/validator/client/beacon-api/propose_attestation_test.go
index 4b2a5c86e5fc..253ab3e34f0d 100644
--- a/validator/client/beacon-api/propose_attestation_test.go
+++ b/validator/client/beacon-api/propose_attestation_test.go
@@ -7,6 +7,7 @@ import (
 	"net/http"
 	"testing"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/network/httputil"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
@@ -117,7 +118,7 @@ func TestProposeAttestation(t *testing.T) {
 
 			ctx := t.Context()
 
-			headers := map[string]string{"Eth-Consensus-Version": version.String(test.attestation.Version())}
+			headers := map[string]string{api.EthConsensusVersionHeader: version.String(test.attestation.Version())}
 			jsonRestHandler.EXPECT().Post(
 				gomock.Any(),
 				"/eth/v2/beacon/pool/attestations",
@@ -177,7 +178,7 @@ func TestProposeAttestationFallBack(t *testing.T) {
 	}
 
 	ctx := t.Context()
-	headers := map[string]string{"Eth-Consensus-Version": version.String(attestation.Version())}
+	headers := map[string]string{api.EthConsensusVersionHeader: version.String(attestation.Version())}
 	jsonRestHandler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v2/beacon/pool/attestations",
@@ -304,7 +305,7 @@ func TestProposeAttestationElectra(t *testing.T) {
 			}
 
 			ctx := t.Context()
-			headers := map[string]string{"Eth-Consensus-Version": version.String(test.attestation.Version())}
+			headers := map[string]string{api.EthConsensusVersionHeader: version.String(test.attestation.Version())}
 			jsonRestHandler.EXPECT().Post(
 				gomock.Any(),
 				"/eth/v2/beacon/pool/attestations",
diff --git a/validator/client/beacon-api/propose_beacon_block_test.go b/validator/client/beacon-api/propose_beacon_block_test.go
index 8383efe058dc..cb9dfc6dcefb 100644
--- a/validator/client/beacon-api/propose_beacon_block_test.go
+++ b/validator/client/beacon-api/propose_beacon_block_test.go
@@ -7,6 +7,7 @@ import (
 	"net/http"
 	"testing"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	rpctesting "github.com/OffchainLabs/prysm/v6/beacon-chain/rpc/eth/shared/testing"
 	"github.com/OffchainLabs/prysm/v6/network/httputil"
@@ -107,7 +108,7 @@ func TestProposeBeaconBlock_SSZ_Error(t *testing.T) {
 
 				// Expect PostSSZ to be called first with SSZ data
 				headers := map[string]string{
-					"Eth-Consensus-Version": testCase.consensusVersion,
+					api.EthConsensusVersionHeader: testCase.consensusVersion,
 				}
 				jsonRestHandler.EXPECT().PostSSZ(
 					gomock.Any(),
@@ -169,7 +170,7 @@ func TestProposeBeaconBlock_SSZSuccess_NoFallback(t *testing.T) {
 
 			// Expect PostSSZ to be called and succeed
 			headers := map[string]string{
-				"Eth-Consensus-Version": testCase.consensusVersion,
+				api.EthConsensusVersionHeader: testCase.consensusVersion,
 			}
 			jsonRestHandler.EXPECT().PostSSZ(
 				gomock.Any(),
@@ -647,7 +648,7 @@ func TestProposeBeaconBlock_SSZFails_Non406_NoFallback(t *testing.T) {
 
 			// Expect PostSSZ to be called first and fail with non-406 error
 			sszHeaders := map[string]string{
-				"Eth-Consensus-Version": testCase.consensusVersion,
+				api.EthConsensusVersionHeader: testCase.consensusVersion,
 			}
 			jsonRestHandler.EXPECT().PostSSZ(
 				gomock.Any(),
diff --git a/validator/client/beacon-api/rest_handler_client.go b/validator/client/beacon-api/rest_handler_client.go
index ab8378d875a3..5a8b99a39503 100644
--- a/validator/client/beacon-api/rest_handler_client.go
+++ b/validator/client/beacon-api/rest_handler_client.go
@@ -53,7 +53,7 @@ func NewBeaconApiRestHandler(client http.Client, host string) RestHandler {
 func (c *BeaconApiRestHandler) appendAcceptOverride() {
 	if accept := os.Getenv(params.EnvNameOverrideAccept); accept != "" {
 		c.reqOverrides = append(c.reqOverrides, func(req *http.Request) {
-			req.Header.Set("Accept", accept)
+			req.Header.Set(api.AcceptHeader, accept)
 		})
 	}
 }
@@ -76,7 +76,7 @@ func (c *BeaconApiRestHandler) Get(ctx context.Context, endpoint string, resp in
 	if err != nil {
 		return errors.Wrapf(err, "failed to create request for endpoint %s", url)
 	}
-	req.Header.Set("User-Agent", version.BuildData())
+	req.Header.Set(api.UserAgentHeader, version.BuildData())
 	httpResp, err := c.client.Do(req)
 	if err != nil {
 		return errors.Wrapf(err, "failed to perform request for endpoint %s", url)
@@ -100,13 +100,13 @@ func (c *BeaconApiRestHandler) GetSSZ(ctx context.Context, endpoint string) ([]b
 	primaryAcceptType := fmt.Sprintf("%s;q=%s", api.OctetStreamMediaType, "0.95")
 	secondaryAcceptType := fmt.Sprintf("%s;q=%s", api.JsonMediaType, "0.9")
 	acceptHeaderString := fmt.Sprintf("%s,%s", primaryAcceptType, secondaryAcceptType)
-	req.Header.Set("Accept", acceptHeaderString)
+	req.Header.Set(api.AcceptHeader, acceptHeaderString)
 
 	for _, o := range c.reqOverrides {
 		o(req)
 	}
 
-	req.Header.Set("User-Agent", version.BuildData())
+	req.Header.Set(api.UserAgentHeader, version.BuildData())
 	httpResp, err := c.client.Do(req)
 	if err != nil {
 		return nil, nil, errors.Wrapf(err, "failed to perform request for endpoint %s", url)
@@ -116,8 +116,8 @@ func (c *BeaconApiRestHandler) GetSSZ(ctx context.Context, endpoint string) ([]b
 			return
 		}
 	}()
-	accept := req.Header.Get("Accept")
-	contentType := httpResp.Header.Get("Content-Type")
+	accept := req.Header.Get(api.AcceptHeader)
+	contentType := httpResp.Header.Get(api.ContentTypeHeader)
 	body, err := io.ReadAll(httpResp.Body)
 	if err != nil {
 		return nil, nil, errors.Wrapf(err, "failed to read response body for %s", httpResp.Request.URL)
@@ -125,8 +125,8 @@ func (c *BeaconApiRestHandler) GetSSZ(ctx context.Context, endpoint string) ([]b
 
 	if !apiutil.PrimaryAcceptMatches(accept, contentType) {
 		log.WithFields(logrus.Fields{
-			"Accept":       accept,
-			"Content-Type": contentType,
+			api.AcceptHeader:      accept,
+			api.ContentTypeHeader: contentType,
 		}).Debug("Server responded with non primary accept type")
 	}
 
@@ -165,8 +165,8 @@ func (c *BeaconApiRestHandler) Post(
 	for headerKey, headerValue := range headers {
 		req.Header.Set(headerKey, headerValue)
 	}
-	req.Header.Set("Content-Type", api.JsonMediaType)
-	req.Header.Set("User-Agent", version.BuildData())
+	req.Header.Set(api.ContentTypeHeader, api.JsonMediaType)
+	req.Header.Set(api.UserAgentHeader, version.BuildData())
 	httpResp, err := c.client.Do(req)
 	if err != nil {
 		return errors.Wrapf(err, "failed to perform request for endpoint %s", url)
@@ -200,7 +200,7 @@ func (c *BeaconApiRestHandler) PostSSZ(
 	primaryAcceptType := fmt.Sprintf("%s;q=%s", api.OctetStreamMediaType, "0.95")
 	secondaryAcceptType := fmt.Sprintf("%s;q=%s", api.JsonMediaType, "0.9")
 	acceptHeaderString := fmt.Sprintf("%s,%s", primaryAcceptType, secondaryAcceptType)
-	req.Header.Set("Accept", acceptHeaderString)
+	req.Header.Set(api.AcceptHeader, acceptHeaderString)
 
 	// User-supplied headers
 	for headerKey, headerValue := range headers {
@@ -210,8 +210,8 @@ func (c *BeaconApiRestHandler) PostSSZ(
 	for _, o := range c.reqOverrides {
 		o(req)
 	}
-	req.Header.Set("Content-Type", api.OctetStreamMediaType)
-	req.Header.Set("User-Agent", version.BuildData())
+	req.Header.Set(api.ContentTypeHeader, api.OctetStreamMediaType)
+	req.Header.Set(api.UserAgentHeader, version.BuildData())
 	httpResp, err := c.client.Do(req)
 	if err != nil {
 		return nil, nil, errors.Wrapf(err, "failed to perform request for endpoint %s", url)
@@ -222,8 +222,8 @@ func (c *BeaconApiRestHandler) PostSSZ(
 		}
 	}()
 
-	accept := req.Header.Get("Accept")
-	contentType := httpResp.Header.Get("Content-Type")
+	accept := req.Header.Get(api.AcceptHeader)
+	contentType := httpResp.Header.Get(api.ContentTypeHeader)
 	body, err := io.ReadAll(httpResp.Body)
 	if err != nil {
 		return nil, nil, errors.Wrapf(err, "failed to read response body for %s", httpResp.Request.URL)
@@ -231,8 +231,8 @@ func (c *BeaconApiRestHandler) PostSSZ(
 
 	if !apiutil.PrimaryAcceptMatches(accept, contentType) {
 		log.WithFields(logrus.Fields{
-			"Accept":       accept,
-			"Content-Type": contentType,
+			api.AcceptHeader:      accept,
+			api.ContentTypeHeader: contentType,
 		}).Debug("Server responded with non primary accept type")
 	}
 
@@ -255,7 +255,7 @@ func decodeResp(httpResp *http.Response, resp interface{}) error {
 		return errors.Wrapf(err, "failed to read response body for %s", httpResp.Request.URL)
 	}
 
-	if !strings.Contains(httpResp.Header.Get("Content-Type"), api.JsonMediaType) {
+	if !strings.Contains(httpResp.Header.Get(api.ContentTypeHeader), api.JsonMediaType) {
 		// 2XX codes are a success
 		if strings.HasPrefix(httpResp.Status, "2") {
 			return nil
diff --git a/validator/client/beacon-api/rest_handler_client_test.go b/validator/client/beacon-api/rest_handler_client_test.go
index af3d928440ca..3399bbfdb3ab 100644
--- a/validator/client/beacon-api/rest_handler_client_test.go
+++ b/validator/client/beacon-api/rest_handler_client_test.go
@@ -37,8 +37,8 @@ func TestGet(t *testing.T) {
 	mux.HandleFunc(endpoint, func(w http.ResponseWriter, r *http.Request) {
 		marshalledJson, err := json.Marshal(genesisJson)
 		require.NoError(t, err)
-		assert.Equal(t, version.BuildData(), r.Header.Get("User-Agent"))
-		w.Header().Set("Content-Type", api.JsonMediaType)
+		assert.Equal(t, version.BuildData(), r.Header.Get(api.UserAgentHeader))
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		_, err = w.Write(marshalledJson)
 		require.NoError(t, err)
 	})
@@ -70,9 +70,9 @@ func TestGetSSZ(t *testing.T) {
 
 		mux := http.NewServeMux()
 		mux.HandleFunc(endpoint, func(w http.ResponseWriter, r *http.Request) {
-			assert.StringContains(t, api.OctetStreamMediaType, r.Header.Get("Accept"))
-			assert.Equal(t, version.BuildData(), r.Header.Get("User-Agent"))
-			w.Header().Set("Content-Type", api.OctetStreamMediaType)
+			assert.StringContains(t, api.OctetStreamMediaType, r.Header.Get(api.AcceptHeader))
+			assert.Equal(t, version.BuildData(), r.Header.Get(api.UserAgentHeader))
+			w.Header().Set(api.ContentTypeHeader, api.OctetStreamMediaType)
 			_, err := w.Write(expectedBody)
 			require.NoError(t, err)
 		})
@@ -87,7 +87,7 @@ func TestGetSSZ(t *testing.T) {
 		body, header, err := jsonRestHandler.GetSSZ(ctx, endpoint)
 		require.NoError(t, err)
 		assert.DeepEqual(t, expectedBody, body)
-		require.StringContains(t, api.OctetStreamMediaType, header.Get("Content-Type"))
+		require.StringContains(t, api.OctetStreamMediaType, header.Get(api.ContentTypeHeader))
 	})
 
 	t.Run("Json Content-Type response", func(t *testing.T) {
@@ -96,8 +96,8 @@ func TestGetSSZ(t *testing.T) {
 		logHook := test.NewGlobal()
 		mux := http.NewServeMux()
 		mux.HandleFunc(endpoint, func(w http.ResponseWriter, r *http.Request) {
-			assert.StringContains(t, api.OctetStreamMediaType, r.Header.Get("Accept"))
-			w.Header().Set("Content-Type", api.JsonMediaType)
+			assert.StringContains(t, api.OctetStreamMediaType, r.Header.Get(api.AcceptHeader))
+			w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 
 			marshalledJson, err := json.Marshal(genesisJson)
 			require.NoError(t, err)
@@ -116,7 +116,7 @@ func TestGetSSZ(t *testing.T) {
 		body, header, err := jsonRestHandler.GetSSZ(ctx, endpoint)
 		require.NoError(t, err)
 		assert.LogsContain(t, logHook, "Server responded with non primary accept type")
-		require.Equal(t, api.JsonMediaType, header.Get("Content-Type"))
+		require.Equal(t, api.JsonMediaType, header.Get(api.ContentTypeHeader))
 		resp := &structs.GetGenesisResponse{}
 		require.NoError(t, json.Unmarshal(body, resp))
 		require.Equal(t, "123", resp.Data.GenesisTime)
@@ -128,8 +128,8 @@ func TestGetSSZ(t *testing.T) {
 		logHook := test.NewGlobal()
 		mux := http.NewServeMux()
 		mux.HandleFunc(endpoint, func(w http.ResponseWriter, r *http.Request) {
-			assert.StringContains(t, api.OctetStreamMediaType, r.Header.Get("Accept"))
-			w.Header().Set("Content-Type", "text/plain") // Invalid content type
+			assert.StringContains(t, api.OctetStreamMediaType, r.Header.Get(api.AcceptHeader))
+			w.Header().Set(api.ContentTypeHeader, api.PlainMediaType) // Invalid content type
 			_, err := w.Write([]byte("some text"))
 			require.NoError(t, err)
 		})
@@ -155,8 +155,8 @@ func TestAcceptOverrideSSZ(t *testing.T) {
 	}()
 	require.NoError(t, os.Setenv(params.EnvNameOverrideAccept, name))
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		require.Equal(t, name, r.Header.Get("Accept"))
-		w.WriteHeader(200)
+		require.Equal(t, name, r.Header.Get(api.AcceptHeader))
+		w.WriteHeader(http.StatusOK)
 		_, err := w.Write([]byte("ok"))
 		require.NoError(t, err)
 	}))
@@ -184,8 +184,8 @@ func TestPost(t *testing.T) {
 	mux.HandleFunc(endpoint, func(w http.ResponseWriter, r *http.Request) {
 		// Make sure the request headers have been set
 		assert.Equal(t, "bar", r.Header.Get("foo"))
-		assert.Equal(t, version.BuildData(), r.Header.Get("User-Agent"))
-		assert.Equal(t, api.JsonMediaType, r.Header.Get("Content-Type"))
+		assert.Equal(t, version.BuildData(), r.Header.Get(api.UserAgentHeader))
+		assert.Equal(t, api.JsonMediaType, r.Header.Get(api.ContentTypeHeader))
 
 		// Make sure the data matches
 		receivedBytes := make([]byte, len(dataBytes))
@@ -197,7 +197,7 @@ func TestPost(t *testing.T) {
 		marshalledJson, err := json.Marshal(genesisJson)
 		require.NoError(t, err)
 
-		w.Header().Set("Content-Type", api.JsonMediaType)
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		_, err = w.Write(marshalledJson)
 		require.NoError(t, err)
 	})
@@ -223,7 +223,7 @@ func Test_decodeResp(t *testing.T) {
 			Status:     "200",
 			StatusCode: http.StatusOK,
 			Body:       io.NopCloser(&body),
-			Header:     map[string][]string{"Content-Type": {"application/json; charset=utf-8"}},
+			Header:     map[string][]string{api.ContentTypeHeader: {"application/json; charset=utf-8"}},
 		}
 		require.NoError(t, decodeResp(r, nil))
 	})
@@ -233,7 +233,7 @@ func Test_decodeResp(t *testing.T) {
 			Status:     "200",
 			StatusCode: http.StatusOK,
 			Body:       io.NopCloser(&body),
-			Header:     map[string][]string{"Content-Type": {api.OctetStreamMediaType}},
+			Header:     map[string][]string{api.ContentTypeHeader: {api.OctetStreamMediaType}},
 		}
 		require.NoError(t, decodeResp(r, nil))
 	})
@@ -243,7 +243,7 @@ func Test_decodeResp(t *testing.T) {
 			Status:     "204",
 			StatusCode: http.StatusNoContent,
 			Body:       io.NopCloser(&body),
-			Header:     map[string][]string{"Content-Type": {api.OctetStreamMediaType}},
+			Header:     map[string][]string{api.ContentTypeHeader: {api.OctetStreamMediaType}},
 		}
 		require.NoError(t, decodeResp(r, nil))
 	})
@@ -255,7 +255,7 @@ func Test_decodeResp(t *testing.T) {
 			Status:     "500",
 			StatusCode: http.StatusInternalServerError,
 			Body:       io.NopCloser(&body),
-			Header:     map[string][]string{"Content-Type": {api.OctetStreamMediaType}},
+			Header:     map[string][]string{api.ContentTypeHeader: {api.OctetStreamMediaType}},
 		}
 		err = decodeResp(r, nil)
 		errJson := &httputil.DefaultJsonError{}
@@ -272,7 +272,7 @@ func Test_decodeResp(t *testing.T) {
 			Status:     "200",
 			StatusCode: http.StatusOK,
 			Body:       io.NopCloser(&body),
-			Header:     map[string][]string{"Content-Type": {api.JsonMediaType}},
+			Header:     map[string][]string{api.ContentTypeHeader: {api.JsonMediaType}},
 		}
 		resp := &j{}
 		require.NoError(t, decodeResp(r, resp))
@@ -284,7 +284,7 @@ func Test_decodeResp(t *testing.T) {
 			Status:     "200",
 			StatusCode: http.StatusOK,
 			Body:       io.NopCloser(&body),
-			Header:     map[string][]string{"Content-Type": {api.JsonMediaType}},
+			Header:     map[string][]string{api.ContentTypeHeader: {api.JsonMediaType}},
 		}
 		require.NoError(t, decodeResp(r, nil))
 	})
@@ -294,7 +294,7 @@ func Test_decodeResp(t *testing.T) {
 			Status:     "204",
 			StatusCode: http.StatusNoContent,
 			Body:       io.NopCloser(&body),
-			Header:     map[string][]string{"Content-Type": {api.JsonMediaType}},
+			Header:     map[string][]string{api.ContentTypeHeader: {api.JsonMediaType}},
 		}
 		require.NoError(t, decodeResp(r, nil))
 	})
@@ -307,7 +307,7 @@ func Test_decodeResp(t *testing.T) {
 			Status:     "500",
 			StatusCode: http.StatusInternalServerError,
 			Body:       io.NopCloser(&body),
-			Header:     map[string][]string{"Content-Type": {api.JsonMediaType}},
+			Header:     map[string][]string{api.ContentTypeHeader: {api.JsonMediaType}},
 		}
 		err = decodeResp(r, nil)
 		errJson := &httputil.DefaultJsonError{}
@@ -323,7 +323,7 @@ func Test_decodeResp(t *testing.T) {
 			Status:     "200",
 			StatusCode: http.StatusOK,
 			Body:       io.NopCloser(&body),
-			Header:     map[string][]string{"Content-Type": {api.JsonMediaType}},
+			Header:     map[string][]string{api.ContentTypeHeader: {api.JsonMediaType}},
 			Request:    &http.Request{},
 		}
 		resp := &j{}
@@ -338,7 +338,7 @@ func Test_decodeResp(t *testing.T) {
 			Status:     "500",
 			StatusCode: http.StatusInternalServerError,
 			Body:       io.NopCloser(&body),
-			Header:     map[string][]string{"Content-Type": {api.JsonMediaType}},
+			Header:     map[string][]string{api.ContentTypeHeader: {api.JsonMediaType}},
 			Request:    &http.Request{},
 		}
 		err = decodeResp(r, nil)
diff --git a/validator/client/beacon-api/submit_signed_aggregate_proof.go b/validator/client/beacon-api/submit_signed_aggregate_proof.go
index a31086deed89..7638ed32717c 100644
--- a/validator/client/beacon-api/submit_signed_aggregate_proof.go
+++ b/validator/client/beacon-api/submit_signed_aggregate_proof.go
@@ -6,6 +6,7 @@ import (
 	"encoding/json"
 	"net/http"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	"github.com/OffchainLabs/prysm/v6/network/httputil"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
@@ -18,7 +19,7 @@ func (c *beaconApiValidatorClient) submitSignedAggregateSelectionProof(ctx conte
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to marshal SignedAggregateAttestationAndProof")
 	}
-	headers := map[string]string{"Eth-Consensus-Version": version.String(in.SignedAggregateAndProof.Version())}
+	headers := map[string]string{api.EthConsensusVersionHeader: version.String(in.SignedAggregateAndProof.Version())}
 	err = c.jsonRestHandler.Post(ctx, "/eth/v2/validator/aggregate_and_proofs", headers, bytes.NewBuffer(body), nil)
 	errJson := &httputil.DefaultJsonError{}
 	if err != nil {
@@ -54,7 +55,7 @@ func (c *beaconApiValidatorClient) submitSignedAggregateSelectionProofElectra(ct
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to marshal SignedAggregateAttestationAndProofElectra")
 	}
-	headers := map[string]string{"Eth-Consensus-Version": version.String(in.SignedAggregateAndProof.Version())}
+	headers := map[string]string{api.EthConsensusVersionHeader: version.String(in.SignedAggregateAndProof.Version())}
 	if err = c.jsonRestHandler.Post(ctx, "/eth/v2/validator/aggregate_and_proofs", headers, bytes.NewBuffer(body), nil); err != nil {
 		return nil, err
 	}
diff --git a/validator/client/beacon-api/submit_signed_aggregate_proof_test.go b/validator/client/beacon-api/submit_signed_aggregate_proof_test.go
index d41b9a89ab39..316f4c645de9 100644
--- a/validator/client/beacon-api/submit_signed_aggregate_proof_test.go
+++ b/validator/client/beacon-api/submit_signed_aggregate_proof_test.go
@@ -6,6 +6,7 @@ import (
 	"net/http"
 	"testing"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	"github.com/OffchainLabs/prysm/v6/network/httputil"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
@@ -27,7 +28,7 @@ func TestSubmitSignedAggregateSelectionProof_Valid(t *testing.T) {
 	require.NoError(t, err)
 
 	ctx := t.Context()
-	headers := map[string]string{"Eth-Consensus-Version": version.String(signedAggregateAndProof.Message.Version())}
+	headers := map[string]string{api.EthConsensusVersionHeader: version.String(signedAggregateAndProof.Message.Version())}
 	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
 	jsonRestHandler.EXPECT().Post(
 		gomock.Any(),
@@ -59,7 +60,7 @@ func TestSubmitSignedAggregateSelectionProof_BadRequest(t *testing.T) {
 	require.NoError(t, err)
 
 	ctx := t.Context()
-	headers := map[string]string{"Eth-Consensus-Version": version.String(signedAggregateAndProof.Message.Version())}
+	headers := map[string]string{api.EthConsensusVersionHeader: version.String(signedAggregateAndProof.Message.Version())}
 	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
 	jsonRestHandler.EXPECT().Post(
 		gomock.Any(),
@@ -89,7 +90,7 @@ func TestSubmitSignedAggregateSelectionProof_Fallback(t *testing.T) {
 	ctx := t.Context()
 
 	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	headers := map[string]string{"Eth-Consensus-Version": version.String(signedAggregateAndProof.Message.Version())}
+	headers := map[string]string{api.EthConsensusVersionHeader: version.String(signedAggregateAndProof.Message.Version())}
 	jsonRestHandler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v2/validator/aggregate_and_proofs",
@@ -131,7 +132,7 @@ func TestSubmitSignedAggregateSelectionProofElectra_Valid(t *testing.T) {
 	require.NoError(t, err)
 
 	ctx := t.Context()
-	headers := map[string]string{"Eth-Consensus-Version": version.String(signedAggregateAndProofElectra.Message.Version())}
+	headers := map[string]string{api.EthConsensusVersionHeader: version.String(signedAggregateAndProofElectra.Message.Version())}
 	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
 	jsonRestHandler.EXPECT().Post(
 		gomock.Any(),
@@ -163,7 +164,7 @@ func TestSubmitSignedAggregateSelectionProofElectra_BadRequest(t *testing.T) {
 	require.NoError(t, err)
 
 	ctx := t.Context()
-	headers := map[string]string{"Eth-Consensus-Version": version.String(signedAggregateAndProofElectra.Message.Version())}
+	headers := map[string]string{api.EthConsensusVersionHeader: version.String(signedAggregateAndProofElectra.Message.Version())}
 	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
 	jsonRestHandler.EXPECT().Post(
 		gomock.Any(),
diff --git a/validator/keymanager/remote-web3signer/BUILD.bazel b/validator/keymanager/remote-web3signer/BUILD.bazel
index 46119f746e5e..8785c2555562 100644
--- a/validator/keymanager/remote-web3signer/BUILD.bazel
+++ b/validator/keymanager/remote-web3signer/BUILD.bazel
@@ -41,6 +41,7 @@ go_test(
     srcs = ["keymanager_test.go"],
     embed = [":go_default_library"],
     deps = [
+        "//api:go_default_library",
         "//crypto/bls:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//io/file:go_default_library",
diff --git a/validator/keymanager/remote-web3signer/internal/BUILD.bazel b/validator/keymanager/remote-web3signer/internal/BUILD.bazel
index dddb6c925365..6262e9dd23c2 100644
--- a/validator/keymanager/remote-web3signer/internal/BUILD.bazel
+++ b/validator/keymanager/remote-web3signer/internal/BUILD.bazel
@@ -10,6 +10,7 @@ go_library(
     importpath = "github.com/OffchainLabs/prysm/v6/validator/keymanager/remote-web3signer/internal",
     visibility = ["//validator/keymanager/remote-web3signer:__subpackages__"],
     deps = [
+        "//api:go_default_library",
         "//config/fieldparams:go_default_library",
         "//crypto/bls:go_default_library",
         "//monitoring/tracing:go_default_library",
@@ -28,6 +29,7 @@ go_test(
     srcs = ["client_test.go"],
     deps = [
         ":go_default_library",
+        "//api:go_default_library",
         "//testing/require:go_default_library",
         "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
         "@com_github_stretchr_testify//assert:go_default_library",
diff --git a/validator/keymanager/remote-web3signer/internal/client.go b/validator/keymanager/remote-web3signer/internal/client.go
index f4e4151529a2..8478af35a62c 100644
--- a/validator/keymanager/remote-web3signer/internal/client.go
+++ b/validator/keymanager/remote-web3signer/internal/client.go
@@ -13,6 +13,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
 	"github.com/OffchainLabs/prysm/v6/crypto/bls"
 	"github.com/OffchainLabs/prysm/v6/monitoring/tracing"
@@ -74,8 +75,8 @@ func (client *ApiClient) Sign(ctx context.Context, pubKey string, request SignRe
 	if resp.StatusCode == http.StatusPreconditionFailed {
 		return nil, fmt.Errorf("signing operation failed due to slashing protection rules,  Signing Request URL: %v, Status: %v", client.BaseURL.String()+requestPath, resp.StatusCode)
 	}
-	contentType := resp.Header.Get("Content-Type")
-	if strings.HasPrefix(contentType, "application/json") {
+	contentType := resp.Header.Get(api.ContentTypeHeader)
+	if strings.HasPrefix(contentType, api.JsonMediaType) {
 		var sigResp SignatureResponse
 		if err := unmarshalResponse(resp.Body, &sigResp); err != nil {
 			return nil, err
@@ -148,7 +149,7 @@ func (client *ApiClient) doRequest(ctx context.Context, httpMethod, fullPath str
 	if err != nil {
 		return nil, errors.Wrap(err, "invalid format, failed to create new Post Request Object")
 	}
-	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set(api.ContentTypeHeader, api.JsonMediaType)
 
 	start := time.Now()
 	resp, err := client.RestClient.Do(req)
diff --git a/validator/keymanager/remote-web3signer/internal/client_test.go b/validator/keymanager/remote-web3signer/internal/client_test.go
index 475b382084e2..1fd5ecaafda8 100644
--- a/validator/keymanager/remote-web3signer/internal/client_test.go
+++ b/validator/keymanager/remote-web3signer/internal/client_test.go
@@ -9,6 +9,7 @@ import (
 	"net/url"
 	"testing"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/validator/keymanager/remote-web3signer/internal"
 	"github.com/ethereum/go-ethereum/common/hexutil"
@@ -61,7 +62,7 @@ func TestClient_Sign_HappyPath_Jsontype(t *testing.T) {
 	require.NoError(t, err)
 	// create a new reader with that JSON
 	header := http.Header{}
-	header.Set("Content-Type", "application/json;  charset=UTF-8")
+	header.Set(api.ContentTypeHeader, "application/json;  charset=UTF-8")
 	r := io.NopCloser(bytes.NewReader(jsonBytes))
 	mock := &mockTransport{mockResponse: &http.Response{
 		StatusCode: 200,
diff --git a/validator/keymanager/remote-web3signer/keymanager_test.go b/validator/keymanager/remote-web3signer/keymanager_test.go
index fc6fdfd04dcb..892c709ce97b 100644
--- a/validator/keymanager/remote-web3signer/keymanager_test.go
+++ b/validator/keymanager/remote-web3signer/keymanager_test.go
@@ -14,6 +14,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/crypto/bls"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
 	"github.com/OffchainLabs/prysm/v6/io/file"
@@ -47,7 +48,7 @@ func (mc *MockClient) GetPublicKeys(_ context.Context, _ string) ([]string, erro
 func TestNewKeymanager(t *testing.T) {
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusOK)
-		w.Header().Set("Content-Type", "application/json")
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		err := json.NewEncoder(w).Encode([]string{"0xa2b5aaad9c6efefe7bb9b1243a043404f3362937cfb6b31833929833173f476630ea2cfeb0d9ddf15f97ca8685948820"})
 		require.NoError(t, err)
 	}))
@@ -517,7 +518,7 @@ func TestKeymanager_FetchValidatingPublicKeys_HappyPath_WithExternalURL(t *testi
 	require.NoError(t, err)
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusOK)
-		w.Header().Set("Content-Type", "application/json")
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		err = json.NewEncoder(w).Encode([]string{"0xa2b5aaad9c6efefe7bb9b1243a043404f3362937cfb6b31833929833173f476630ea2cfeb0d9ddf15f97ca8685948820"})
 		require.NoError(t, err)
 	}))
@@ -539,7 +540,7 @@ func TestKeymanager_FetchValidatingPublicKeys_WithExternalURL_ThrowsError(t *tes
 	ctx := t.Context()
 
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
+		w.Header().Set(api.ContentTypeHeader, api.JsonMediaType)
 		http.Error(w, "mock error", http.StatusInternalServerError)
 	}))
 	defer srv.Close()
diff --git a/validator/rpc/handlers_health.go b/validator/rpc/handlers_health.go
index 32cf39e6fdf1..584aac31ef35 100644
--- a/validator/rpc/handlers_health.go
+++ b/validator/rpc/handlers_health.go
@@ -40,9 +40,9 @@ func (s *Server) StreamBeaconLogs(w http.ResponseWriter, r *http.Request) {
 	ctx, span := trace.StartSpan(r.Context(), "validator.web.health.StreamBeaconLogs")
 	defer span.End()
 	// Set up SSE response headers
-	w.Header().Set("Content-Type", api.EventStreamMediaType)
-	w.Header().Set("Cache-Control", "no-cache")
-	w.Header().Set("Connection", api.KeepAlive)
+	w.Header().Set(api.ContentTypeHeader, api.EventStreamMediaType)
+	w.Header().Set(api.CacheControlHeader, api.NoCache)
+	w.Header().Set(api.ConnectionHeader, api.KeepAlive)
 
 	// Flush helper function to ensure data is sent to client
 	flusher, ok := w.(http.Flusher)
@@ -109,9 +109,9 @@ func (s *Server) StreamValidatorLogs(w http.ResponseWriter, r *http.Request) {
 		close(ch)
 	}()
 	// Set up SSE response headers
-	w.Header().Set("Content-Type", api.EventStreamMediaType)
-	w.Header().Set("Cache-Control", "no-cache")
-	w.Header().Set("Connection", api.KeepAlive)
+	w.Header().Set(api.ContentTypeHeader, api.EventStreamMediaType)
+	w.Header().Set(api.CacheControlHeader, api.NoCache)
+	w.Header().Set(api.ConnectionHeader, api.KeepAlive)
 
 	recentLogs := s.logStreamer.GetLastFewLogs()
 	logStrings := make([]string, len(recentLogs))
diff --git a/validator/rpc/handlers_health_test.go b/validator/rpc/handlers_health_test.go
index 47e499b337ab..03f7d7939ab3 100644
--- a/validator/rpc/handlers_health_test.go
+++ b/validator/rpc/handlers_health_test.go
@@ -90,10 +90,10 @@ func TestStreamBeaconLogs(t *testing.T) {
 	if resp.StatusCode != http.StatusOK {
 		t.Fatalf("Expected status OK but got %v", resp.StatusCode)
 	}
-	ct, ok := resp.Header["Content-Type"]
+	ct, ok := resp.Header[api.ContentTypeHeader]
 	require.Equal(t, ok, true)
 	require.Equal(t, ct[0], api.EventStreamMediaType)
-	cn, ok := resp.Header["Connection"]
+	cn, ok := resp.Header[api.ConnectionHeader]
 	require.Equal(t, ok, true)
 	require.Equal(t, cn[0], api.KeepAlive)
 	body, err := io.ReadAll(resp.Body)
@@ -141,10 +141,10 @@ func TestStreamValidatorLogs(t *testing.T) {
 	if resp.StatusCode != http.StatusOK {
 		t.Fatalf("Expected status OK but got %v", resp.StatusCode)
 	}
-	ct, ok := resp.Header["Content-Type"]
+	ct, ok := resp.Header[api.ContentTypeHeader]
 	require.Equal(t, ok, true)
 	require.Equal(t, ct[0], api.EventStreamMediaType)
-	cn, ok := resp.Header["Connection"]
+	cn, ok := resp.Header[api.ConnectionHeader]
 	require.Equal(t, ok, true)
 	require.Equal(t, cn[0], api.KeepAlive)
 	// Check if data was written
diff --git a/validator/rpc/intercepter.go b/validator/rpc/intercepter.go
index 12761eff0aeb..a672c2551551 100644
--- a/validator/rpc/intercepter.go
+++ b/validator/rpc/intercepter.go
@@ -2,6 +2,7 @@ package rpc
 
 import (
 	"context"
+	"fmt"
 	"net/http"
 	"strings"
 
@@ -40,12 +41,12 @@ func (s *Server) AuthTokenHandler(next http.Handler) http.Handler {
 		// if it's not initialize or has a web prefix
 		if (strings.Contains(r.URL.Path, api.WebApiUrlPrefix) || strings.Contains(r.URL.Path, api.KeymanagerApiPrefix)) && !strings.Contains(r.URL.Path, api.SystemLogsPrefix) {
 			// ignore some routes
-			reqToken := r.Header.Get("Authorization")
+			reqToken := r.Header.Get(api.AuthorizationHeader)
 			if reqToken == "" {
 				httputil.HandleError(w, "Unauthorized: no Authorization header passed. Please use an Authorization header with the jwt created in the prysm wallet", http.StatusUnauthorized)
 				return
 			}
-			tokenParts := strings.Split(reqToken, "Bearer ")
+			tokenParts := strings.Split(reqToken, fmt.Sprintf("%s ", api.BearerAuthorization))
 			if len(tokenParts) != 2 {
 				httputil.HandleError(w, "Invalid token format", http.StatusBadRequest)
 				return
@@ -72,10 +73,10 @@ func (s *Server) authorize(ctx context.Context) error {
 	if !ok {
 		return status.Errorf(codes.Unauthenticated, "Authorization token could not be found")
 	}
-	if len(authHeader) < 1 || !strings.Contains(authHeader[0], "Bearer ") {
+	if len(authHeader) < 1 || !strings.Contains(authHeader[0], fmt.Sprintf("%s ", api.BearerAuthorization)) {
 		return status.Error(codes.Unauthenticated, "Invalid auth header, needs Bearer {token}")
 	}
-	token := strings.Split(authHeader[0], "Bearer ")[1]
+	token := strings.Split(authHeader[0], fmt.Sprintf("%s ", api.BearerAuthorization))[1]
 	if strings.TrimSpace(token) != s.authToken || strings.TrimSpace(s.authToken) == "" {
 		return status.Errorf(codes.Unauthenticated, "Forbidden: token value is invalid")
 	}
diff --git a/validator/rpc/intercepter_test.go b/validator/rpc/intercepter_test.go
index 5fca66058c5c..53274670749c 100644
--- a/validator/rpc/intercepter_test.go
+++ b/validator/rpc/intercepter_test.go
@@ -82,7 +82,7 @@ func TestServer_AuthTokenHandler(t *testing.T) {
 		rr := httptest.NewRecorder()
 		req, err := http.NewRequest(http.MethodGet, "/eth/v1/keystores", http.NoBody)
 		require.NoError(t, err)
-		req.Header.Set("Authorization", "Bearer YOUR_JWT_TOKEN") // Replace with a valid JWT token
+		req.Header.Set(api.AuthorizationHeader, "Bearer YOUR_JWT_TOKEN") // Replace with a valid JWT token
 		testHandler.ServeHTTP(rr, req)
 		require.Equal(t, http.StatusForbidden, rr.Code)
 		errJson := &httputil.DefaultJsonError{}
@@ -93,7 +93,7 @@ func TestServer_AuthTokenHandler(t *testing.T) {
 		rr := httptest.NewRecorder()
 		req, err := http.NewRequest(http.MethodGet, "/eth/v1/keystores", http.NoBody)
 		require.NoError(t, err)
-		req.Header.Set("Authorization", "Bearer "+token) // Replace with a valid JWT token
+		req.Header.Set(api.AuthorizationHeader, "Bearer "+token) // Replace with a valid JWT token
 		testHandler.ServeHTTP(rr, req)
 		require.Equal(t, http.StatusOK, rr.Code)
 	})
diff --git a/validator/web/BUILD.bazel b/validator/web/BUILD.bazel
index d9c867063629..f123b8263b32 100644
--- a/validator/web/BUILD.bazel
+++ b/validator/web/BUILD.bazel
@@ -13,12 +13,18 @@ go_library(
     visibility = [
         "//validator:__subpackages__",
     ],
-    deps = ["@com_github_sirupsen_logrus//:go_default_library"],
+    deps = [
+        "//api:go_default_library",
+        "@com_github_sirupsen_logrus//:go_default_library",
+    ],
 )
 
 go_test(
     name = "go_default_test",
     srcs = ["handler_test.go"],
     embed = [":go_default_library"],
-    deps = ["//testing/assert:go_default_library"],
+    deps = [
+        "//api:go_default_library",
+        "//testing/assert:go_default_library",
+    ],
 )
diff --git a/validator/web/handler.go b/validator/web/handler.go
index c5f5f46199c1..54fc822e009f 100644
--- a/validator/web/handler.go
+++ b/validator/web/handler.go
@@ -5,6 +5,8 @@ import (
 	"net/http"
 	"net/url"
 	"path"
+
+	"github.com/OffchainLabs/prysm/v6/api"
 )
 
 const prefix = "prysm-web-ui"
@@ -25,7 +27,7 @@ var Handler = func(res http.ResponseWriter, req *http.Request) {
 
 	if d, ok := _bindata[p]; ok {
 		m := mime.TypeByExtension(path.Ext(p))
-		res.Header().Add("Content-Type", m)
+		res.Header().Add(api.ContentTypeHeader, m)
 		res.WriteHeader(http.StatusOK)
 		asset, err := d()
 		if err != nil {
@@ -38,7 +40,7 @@ var Handler = func(res http.ResponseWriter, req *http.Request) {
 		// Angular routing expects that routes are rewritten to serve index.html. For example, if
 		// requesting /login, this should serve the single page app index.html.
 		m := mime.TypeByExtension(".html")
-		res.Header().Add("Content-Type", m)
+		res.Header().Add(api.ContentTypeHeader, m)
 		res.WriteHeader(http.StatusOK)
 		asset, err := d()
 		if err != nil {
diff --git a/validator/web/handler_test.go b/validator/web/handler_test.go
index cfa044655de0..5af117c9abd8 100644
--- a/validator/web/handler_test.go
+++ b/validator/web/handler_test.go
@@ -5,6 +5,7 @@ import (
 	"net/http/httptest"
 	"testing"
 
+	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 )
 
@@ -48,7 +49,7 @@ func TestHandler(t *testing.T) {
 			Handler(res, req)
 			assert.Equal(t, tt.wantStatus, res.Result().StatusCode)
 			if tt.wantContentType != "" {
-				assert.Equal(t, tt.wantContentType, res.Result().Header.Get("Content-Type"))
+				assert.Equal(t, tt.wantContentType, res.Result().Header.Get(api.ContentTypeHeader))
 			}
 		})
 	}