diff --git a/internal/http/client.go b/internal/http/client.go
index e3daf0664..32705c64d 100644
--- a/internal/http/client.go
+++ b/internal/http/client.go
@@ -48,6 +48,9 @@ type Client struct {
 	errorValue ErrorResponse
 
 	logger logging.Logger
+
+	// customHeaders stores headers to be applied to all requests
+	customHeaders map[string]string
 }
 
 // NewClient is used to create a new instance of Client.
@@ -104,11 +107,16 @@ func NewClient(cfg config.Config) Client {
 	}
 
 	client := Client{
-		authStrategy: &ClassicV2Authorizer{},
-		client:       r,
-		config:       cfg,
-		errorValue:   &DefaultErrorResponse{},
-		logger:       logger,
+		authStrategy:  &ClassicV2Authorizer{},
+		client:        r,
+		config:        cfg,
+		errorValue:    &DefaultErrorResponse{},
+		logger:        logger,
+		customHeaders: make(map[string]string),
+	}
+
+	if cfg.CustomHeaders != nil {
+		client.SetCustomHeaders(cfg.CustomHeaders)
 	}
 
 	switch cfg.Compression {
@@ -139,6 +147,18 @@ func (c *Client) SetErrorValue(v ErrorResponse) *Client {
 	return c
 }
 
+// SetCustomHeaders is used to set custom headers at the client level
+func (c *Client) SetCustomHeaders(headers map[string]string) {
+	if c.customHeaders == nil {
+		c.customHeaders = make(map[string]string)
+	}
+
+	// Merge the new headers with existing ones
+	for k, v := range headers {
+		c.customHeaders[k] = v
+	}
+}
+
 // Get represents an HTTP GET request to a New Relic API.
 // The queryParams argument can be used to add query string parameters to the requested URL.
 // The respBody argument will be unmarshaled from JSON in the response body to the type provided.
@@ -197,14 +217,15 @@ func (c *Client) PostWithContext(
 	reqBody interface{},
 	respBody interface{},
 ) (*http.Response, error) {
-	req, err := c.NewRequest(http.MethodPost, url, queryParams, reqBody, respBody)
-	if err != nil {
-		return nil, err
-	}
-
-	req.WithContext(ctx)
-
-	return c.Do(req)
+	//req, err := c.NewRequest(http.MethodPost, url, queryParams, reqBody, respBody)
+	//if err != nil {
+	//	return nil, err
+	//}
+	//
+	//req.WithContext(ctx)
+	//
+	//return c.Do(req)
+	return c.PostWithContextAndHeaders(ctx, url, queryParams, reqBody, respBody, nil)
 }
 
 // Put represents an HTTP PUT request to a New Relic API.
@@ -544,3 +565,61 @@ func (c *Client) NewNerdGraphRequest(query string, vars map[string]interface{},
 
 	return req, nil
 }
+
+func (c *Client) PostWithHeaders(
+	url string,
+	queryParams interface{},
+	reqBody interface{},
+	respBody interface{},
+	customHeaders map[string]string,
+) (*http.Response, error) {
+	return c.PostWithContextAndHeaders(context.Background(), url, queryParams, reqBody, respBody, customHeaders)
+}
+
+// new methods for custom headers
+
+func (c *Client) NerdGraphQueryWithHeaders(query string, vars map[string]interface{}, respBody interface{}, customHeaders map[string]string) error {
+	return c.NerdGraphQueryWithContextAndHeaders(context.Background(), query, vars, respBody, customHeaders)
+}
+
+func (c *Client) NerdGraphQueryWithContextAndHeaders(ctx context.Context, query string, vars map[string]interface{}, respBody interface{}, customHeaders map[string]string) error {
+	req, err := c.NewNerdGraphRequest(query, vars, respBody)
+	if err != nil {
+		return err
+	}
+
+	if customHeaders != nil {
+		req.SetCustomHeaders(customHeaders)
+	}
+
+	req.WithContext(ctx)
+
+	_, err = c.Do(req)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (c *Client) PostWithContextAndHeaders(
+	ctx context.Context,
+	url string,
+	queryParams interface{},
+	reqBody interface{},
+	respBody interface{},
+	customHeaders map[string]string,
+) (*http.Response, error) {
+	req, err := c.NewRequest(http.MethodPost, url, queryParams, reqBody, respBody)
+	if err != nil {
+		return nil, err
+	}
+
+	if customHeaders != nil {
+		req.SetCustomHeaders(customHeaders)
+	}
+
+	req.WithContext(ctx)
+
+	return c.Do(req)
+}
diff --git a/internal/http/request.go b/internal/http/request.go
index 6e40a9795..7d0b4a662 100644
--- a/internal/http/request.go
+++ b/internal/http/request.go
@@ -15,15 +15,16 @@ import (
 
 // Request represents a configurable HTTP request.
 type Request struct {
-	method       string
-	url          string
-	params       interface{}
-	reqBody      interface{}
-	value        interface{}
-	config       config.Config
-	authStrategy RequestAuthorizer
-	errorValue   ErrorResponse
-	request      *retryablehttp.Request
+	method        string
+	url           string
+	params        interface{}
+	reqBody       interface{}
+	value         interface{}
+	config        config.Config
+	authStrategy  RequestAuthorizer
+	errorValue    ErrorResponse
+	request       *retryablehttp.Request
+	customHeaders map[string]string
 }
 
 // NewRequest creates a new Request struct.
@@ -35,13 +36,14 @@ func (c *Client) NewRequest(method string, url string, params interface{}, reqBo
 	)
 
 	req := &Request{
-		method:       method,
-		url:          url,
-		params:       params,
-		reqBody:      reqBody,
-		value:        value,
-		authStrategy: c.authStrategy,
-		errorValue:   c.errorValue,
+		method:        method,
+		url:           url,
+		params:        params,
+		reqBody:       reqBody,
+		value:         value,
+		authStrategy:  c.authStrategy,
+		errorValue:    c.errorValue,
+		customHeaders: make(map[string]string),
 	}
 
 	// FIXME: We should remove this requirement on the request
@@ -119,6 +121,14 @@ func (r *Request) SetErrorValue(e ErrorResponse) {
 	r.errorValue = e
 }
 
+// SetCustomHeaders is used to the Request struct to set custom headers for a specific request
+func (r *Request) SetCustomHeaders(headers map[string]string) *Request {
+	for k, v := range headers {
+		r.SetHeader(k, v)
+	}
+	return r
+}
+
 // SetServiceName sets the service name for the request.
 func (r *Request) SetServiceName(serviceName string) {
 	serviceName = fmt.Sprintf("%s|%s", serviceName, defaultServiceName)
@@ -139,6 +149,13 @@ func (r *Request) makeRequest() (*retryablehttp.Request, error) {
 		return nil, err
 	}
 
+	// Apply client-level custom headers if available
+	if r.config.CustomHeaders != nil {
+		for key, value := range r.config.CustomHeaders {
+			r.request.Header.Set(key, value)
+		}
+	}
+
 	return r.request, nil
 }
 
diff --git a/newrelic/newrelic.go b/newrelic/newrelic.go
index e165f7515..70580ce73 100644
--- a/newrelic/newrelic.go
+++ b/newrelic/newrelic.go
@@ -241,3 +241,8 @@ func ConfigLogJSON(logJSON bool) ConfigOption {
 func ConfigLogger(logger logging.Logger) ConfigOption {
 	return config.ConfigLogger(logger)
 }
+
+// ConfigCustomHeaders sets custom headers that will be sent with every request.
+func ConfigCustomHeaders(headers map[string]string) ConfigOption {
+	return config.ConfigCustomHeaders(headers)
+}
diff --git a/pkg/config/config.go b/pkg/config/config.go
index c741ece6e..b20429f38 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -58,6 +58,9 @@ type Config struct {
 
 	// Logger allows customization of the client's underlying logger.
 	Logger logging.Logger
+
+	// CustomHeaders stores headers to be applied to all requests
+	CustomHeaders map[string]string
 }
 
 // New creates a default configuration and returns it
@@ -65,9 +68,10 @@ func New() Config {
 	reg, _ := region.Get(region.Default)
 
 	return Config{
-		region:      reg,
-		LogLevel:    "info",
-		Compression: Compression.None,
+		region:        reg,
+		LogLevel:      "info",
+		Compression:   Compression.None,
+		CustomHeaders: make(map[string]string),
 	}
 }
 
@@ -142,3 +146,19 @@ func (c *Config) GetLogger() logging.Logger {
 
 	return l
 }
+
+// ConfigCustomHeaders sets the custom headers to be sent with each request
+func ConfigCustomHeaders(headers map[string]string) ConfigOption {
+	return func(cfg *Config) error {
+		if cfg.CustomHeaders == nil {
+			cfg.CustomHeaders = make(map[string]string)
+		}
+
+		// Merge the provided headers with existing ones
+		for k, v := range headers {
+			cfg.CustomHeaders[k] = v
+		}
+
+		return nil
+	}
+}
diff --git a/pkg/dashboards/types.go b/pkg/dashboards/types.go
index 7da90f527..692c8a02e 100644
--- a/pkg/dashboards/types.go
+++ b/pkg/dashboards/types.go
@@ -572,7 +572,9 @@ type DashboardWidgetLayoutInput struct {
 // DashboardWidgetNRQLQueryInput - NRQL query used by a widget.
 type DashboardWidgetNRQLQueryInput struct {
 	// New Relic account ID to issue the query against.
-	AccountID int `json:"accountId"`
+	AccountID int `json:"accountId,omitempty"`
+	// New Relic account IDs to issue the query against.
+	AccountIDS []int `json:"accountIds,omitempty"`
 	// NRQL formatted query.
 	Query nrdb.NRQL `json:"query"`
 }