diff --git a/.gitignore b/.gitignore
index 6f2d130..e754dd5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -58,3 +58,4 @@ target/
 
 # build artifacts
 version.txt
+.claude/settings.local.json
diff --git a/Makefile b/Makefile
index 9a7009f..154a492 100644
--- a/Makefile
+++ b/Makefile
@@ -7,8 +7,8 @@ IMAGE="$(REPO)/$(REPO_PATH):$(VERSION)"
 docker: version
 	docker build --build-arg VERSION=$(VERSION) -t $(IMAGE) .
 
-.PHONY: devshell  # Open a developer shell in the docker env
-devshell: docker
+.PHONY: dev  # Open a developer shell in the docker env
+dev: docker
 	docker run --rm -it -v $$PWD:/opt --entrypoint /bin/bash $(IMAGE)
 
 test-client: docker
diff --git a/api/datalake_api/v0.py b/api/datalake_api/v0.py
index c1aad72..84ec951 100644
--- a/api/datalake_api/v0.py
+++ b/api/datalake_api/v0.py
@@ -18,6 +18,8 @@
 from flask import current_app as app
 import os
 import simplejson as json
+from datetime import datetime, timezone
+import decimal
 from .querier import ArchiveQuerier, Cursor, InvalidCursor, \
     DEFAULT_LOOKBACK_DAYS
 from .fetcher import ArchiveFileFetcher
@@ -29,6 +31,38 @@
 
 _archive_querier = None
 
+
+def unix_ms_to_utc_iso(unix_ms):
+    if unix_ms is None:
+        return unix_ms
+    unix_ms_to_iso = unix_ms
+    if isinstance(unix_ms_to_iso, decimal.Decimal):
+        unix_ms_to_iso = float(unix_ms_to_iso)
+    iso = datetime.fromtimestamp(
+        unix_ms_to_iso / 1000.0, tz=timezone.utc
+    ).isoformat(timespec='milliseconds').replace('+00:00', 'Z')
+    return iso
+
+
+def add_utc_metadata(metadata):
+    """Add ISO-8601 UTC timestamp fields to metadata dict
+
+    This function takes a metadata dict and adds start_iso and end_iso fields
+    based on existing start and end epoch timestamps
+    iso precision is set to milliseconds
+    Can be expanded to add any api-level metadata
+    """
+    if not metadata:
+        return metadata
+
+    start_iso = unix_ms_to_utc_iso(metadata['start'])
+    end_iso = unix_ms_to_utc_iso(metadata['end'])
+
+    metadata['start_iso'] = start_iso
+    metadata['end_iso'] = end_iso
+    return metadata
+
+
 def _get_aws_kwargs():
     kwargs = dict(
         region_name=app.config.get('AWS_REGION'),
@@ -305,6 +339,14 @@ def files_get():
                                   type: string
                                   description: 16-byte blake2 hash of the file
                                                content
+                                start_iso:
+                                  type: string
+                                  description: the start time of the file in ISO
+                                               format UTC iso timezone
+                                end_iso:
+                                  type: string
+                                  description: the end time of the file in ISO
+                                               format UTC iso timezone
 
               next:
                   type: string
@@ -349,7 +391,10 @@ def files_get():
                                    where=params.get('where'),
                                    cursor=params.get('cursor'))
 
-    [r.update(http_url=_get_canonical_http_url(r)) for r in results]
+    for r in results:
+        r.update(http_url=_get_canonical_http_url(r))
+        r['metadata'] = add_utc_metadata(r['metadata'])
+
     response = {
         'records': results,
         'next': _get_next_url(flask.request, results),
@@ -476,6 +521,7 @@ def file_get_metadata(file_id):
           id: DatalakeAPIError
     '''
     f = _get_file(file_id)
+    f.metadata = add_utc_metadata(f.metadata)
     return Response(json.dumps(f.metadata), content_type='application/json')
 
 
@@ -542,6 +588,7 @@ def latest_get(what, where):
     params = _validate_latest_params(params)
     f = _get_latest(what, where, params.get('lookback', DEFAULT_LOOKBACK_DAYS))
     f.update(http_url=_get_canonical_http_url(f))
+    f['metadata'] = add_utc_metadata(f['metadata'])
     return Response(json.dumps(f), content_type='application/json')
 
 
diff --git a/api/setup.py b/api/setup.py
index fa3e272..d45adde 100644
--- a/api/setup.py
+++ b/api/setup.py
@@ -30,7 +30,7 @@ def get_version_from_pyver():
         if 'sdist' in sys.argv or 'bdist_wheel' in sys.argv:
             raise ImportError('You must install pyver to create a package')
         else:
-            return 'noversion'
+            return '0.0.0'
     version, version_info = pyver.get_version(pkg="datalake_api",
                                               public=True)
     return version
diff --git a/api/tests/test_metadata.py b/api/tests/test_metadata.py
index 22f0047..7b25bec 100644
--- a/api/tests/test_metadata.py
+++ b/api/tests/test_metadata.py
@@ -11,6 +11,8 @@
 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations under
 # the License.
+from datetime import datetime, timezone
+from decimal import Decimal
 import pytest
 import simplejson as json
 
@@ -32,7 +34,20 @@ def test_get_metadata(metadata_getter, s3_file_maker, random_metadata):
     res = metadata_getter('12345')
     assert res.status_code == 200
     assert res.content_type == 'application/json'
-    assert json.loads(res.data) == random_metadata
+    res_data = json.loads(res.data)
+    for k, v in res_data.items():
+        if k == 'start_iso' or k == 'end_iso':
+            k_epoch = k.replace('_iso','')
+            v_epoch = res_data[k_epoch]
+            if v is None:
+                assert v == v_epoch
+
+            expected_v_iso = datetime.fromtimestamp(
+                v_epoch / 1000.0, tz=timezone.utc
+            ).isoformat(timespec='milliseconds').replace('+00:00', 'Z')
+            assert v == expected_v_iso
+        else:
+            assert v == random_metadata[k]
 
 
 def test_no_such_metadata(s3_bucket_maker, metadata_getter):
diff --git a/ingester/setup.py b/ingester/setup.py
index 792d5b4..2aff6f8 100644
--- a/ingester/setup.py
+++ b/ingester/setup.py
@@ -30,7 +30,7 @@ def get_version_from_pyver():
         if 'sdist' in sys.argv or 'bdist_wheel' in sys.argv:
             raise ImportError('You must install pyver to create a package')
         else:
-            return 'noversion'
+            return '0.0.0'
     version, version_info = pyver.get_version(pkg="datalake_ingester",
                                               public=True)
     return version