diff --git a/src/sentry/api/api_owners.py b/src/sentry/api/api_owners.py
index 9917779525beeb..4ee15fa6bedb3d 100644
--- a/src/sentry/api/api_owners.py
+++ b/src/sentry/api/api_owners.py
@@ -9,6 +9,7 @@ class ApiOwner(Enum):
 
     ALERTS_NOTIFICATIONS = "alerts-notifications"
     BILLING = "revenue"
+    CODECOV = "codecov"
     CRONS = "crons"
     ECOSYSTEM = "ecosystem"
     ENTERPRISE = "enterprise"
diff --git a/src/sentry/api/urls.py b/src/sentry/api/urls.py
index d084ce3d51951a..41dc694e9529e8 100644
--- a/src/sentry/api/urls.py
+++ b/src/sentry/api/urls.py
@@ -68,6 +68,7 @@
     SourceMapDebugBlueThunderEditionEndpoint,
 )
 from sentry.api.endpoints.trace_explorer_ai_setup import TraceExplorerAISetup
+from sentry.codecov.endpoints.TestResults.test_results import TestResultsEndpoint
 from sentry.data_export.endpoints.data_export import DataExportEndpoint
 from sentry.data_export.endpoints.data_export_details import DataExportDetailsEndpoint
 from sentry.data_secrecy.api.waive_data_secrecy import WaiveDataSecrecyEndpoint
@@ -3206,6 +3207,14 @@ def create_group_urls(name_prefix: str) -> list[URLPattern | URLResolver]:
     ),
 ]
 
+PREVENT_URLS = [
+    re_path(
+        r"^owner/(?P<owner>[^\/]+)/repository/(?P<repository>[^\/]+)/commit/(?P<commit>[^\/]+)/test-results/$",
+        TestResultsEndpoint.as_view(),
+        name="sentry-api-0-test-results",
+    ),
+]
+
 urlpatterns = [
     # Relay
     re_path(
@@ -3266,6 +3275,11 @@ def create_group_urls(name_prefix: str) -> list[URLPattern | URLResolver]:
         r"^broadcasts/",
         include(BROADCAST_URLS),
     ),
+    # Prevent
+    re_path(
+        r"^prevent/",
+        include(PREVENT_URLS),
+    ),
     #
     #
     #
diff --git a/src/sentry/codecov/base.py b/src/sentry/codecov/base.py
new file mode 100644
index 00000000000000..e4a20db536b68e
--- /dev/null
+++ b/src/sentry/codecov/base.py
@@ -0,0 +1,16 @@
+from __future__ import annotations
+
+from rest_framework.request import Request
+
+from sentry.api.base import Endpoint
+
+
+class CodecovEndpoint(Endpoint):
+    """
+    Used for endpoints that are specific to Codecov / Prevent.
+    """
+
+    def convert_args(self, request: Request, *args, **kwargs):
+        parsed_args, parsed_kwargs = super().convert_args(request, *args, **kwargs)
+        # TODO: in case we need to modify args, do it here
+        return (parsed_args, parsed_kwargs)
diff --git a/src/sentry/codecov/endpoints/TestResults/query.py b/src/sentry/codecov/endpoints/TestResults/query.py
new file mode 100644
index 00000000000000..7cd4515b86112a
--- /dev/null
+++ b/src/sentry/codecov/endpoints/TestResults/query.py
@@ -0,0 +1,55 @@
+query = """query GetTestResults(
+  $owner: String!
+  $repo: String!
+  $filters: TestResultsFilters
+  $ordering: TestResultsOrdering
+  $first: Int
+  $after: String
+  $last: Int
+  $before: String
+) {
+  owner(username: $owner) {
+    repository: repository(name: $repo) {
+      __typename
+      ... on Repository {
+        testAnalytics {
+          testResults(
+            filters: $filters
+            ordering: $ordering
+            first: $first
+            after: $after
+            last: $last
+            before: $before
+          ) {
+            edges {
+              node {
+                updatedAt
+                avgDuration
+                name
+                failureRate
+                flakeRate
+                commitsFailed
+                totalFailCount
+                totalFlakyFailCount
+                totalSkipCount
+                totalPassCount
+              }
+            }
+            pageInfo {
+              endCursor
+              hasNextPage
+            }
+            totalCount
+          }
+        }
+      }
+      ... on NotFoundError {
+        message
+      }
+      ... on OwnerNotActivatedError {
+        message
+      }
+    }
+  }
+}
+"""
diff --git a/src/sentry/codecov/endpoints/TestResults/serializers.py b/src/sentry/codecov/endpoints/TestResults/serializers.py
new file mode 100644
index 00000000000000..9ed25fb63c4717
--- /dev/null
+++ b/src/sentry/codecov/endpoints/TestResults/serializers.py
@@ -0,0 +1,55 @@
+import sentry_sdk
+from rest_framework import serializers
+
+
+class TestResultNodeSerializer(serializers.Serializer):
+    """
+    Serializer for individual test result nodes from GraphQL response
+    """
+
+    updatedAt = serializers.CharField()
+    avgDuration = serializers.FloatField()
+    name = serializers.CharField()
+    failureRate = serializers.FloatField()
+    flakeRate = serializers.FloatField()
+    commitsFailed = serializers.IntegerField()
+    totalFailCount = serializers.IntegerField()
+    totalFlakyFailCount = serializers.IntegerField()
+    totalSkipCount = serializers.IntegerField()
+    totalPassCount = serializers.IntegerField()
+    lastDuration = serializers.FloatField()
+
+
+class TestResultSerializer(serializers.ListSerializer):
+    """
+    Serializer for a list of test results - inherits from ListSerializer to handle arrays
+    """
+
+    child = TestResultNodeSerializer()
+
+    def to_representation(self, graphql_response):
+        """
+        Transform the GraphQL response to the expected client format
+        """
+        try:
+            # Extract test result nodes from the nested GraphQL structure
+            test_results = graphql_response["data"]["owner"]["repository"]["testAnalytics"][
+                "testResults"
+            ]["edges"]
+
+            # Transform each edge to just the node data
+            nodes = []
+            for edge in test_results:
+                node = edge["node"]
+                # Add lastDuration fallback if not present
+                if "lastDuration" not in node:
+                    node["lastDuration"] = node["avgDuration"]
+                nodes.append(node)
+
+            # Use the parent ListSerializer to serialize each test result
+            return super().to_representation(nodes)
+
+        except (KeyError, TypeError) as e:
+            # Handle malformed GraphQL response
+            sentry_sdk.capture_exception(e)
+            return []
diff --git a/src/sentry/codecov/endpoints/TestResults/test_results.py b/src/sentry/codecov/endpoints/TestResults/test_results.py
new file mode 100644
index 00000000000000..8258e4f4a0736f
--- /dev/null
+++ b/src/sentry/codecov/endpoints/TestResults/test_results.py
@@ -0,0 +1,85 @@
+from rest_framework.request import Request
+from rest_framework.response import Response
+
+from sentry.api.api_owners import ApiOwner
+from sentry.api.api_publish_status import ApiPublishStatus
+from sentry.api.base import region_silo_endpoint
+from sentry.codecov.base import CodecovEndpoint
+from sentry.codecov.client import CodecovApiClient
+from sentry.codecov.endpoints.TestResults.query import query
+from sentry.codecov.endpoints.TestResults.serializers import TestResultSerializer
+
+# Sample GraphQL response structure for reference
+sample_graphql_response = {
+    "data": {
+        "owner": {
+            "repository": {
+                "__typename": "Repository",
+                "testAnalytics": {
+                    "testResults": {
+                        "edges": [
+                            {
+                                "node": {
+                                    "updatedAt": "2025-05-22T16:21:18.763951+00:00",
+                                    "avgDuration": 0.04066228070175437,
+                                    "name": "../usr/local/lib/python3.13/site-packages/asgiref/sync.py::GetFinalYamlInteractorTest::test_when_commit_has_no_yaml",
+                                    "failureRate": 0.0,
+                                    "flakeRate": 0.0,
+                                    "commitsFailed": 0,
+                                    "totalFailCount": 0,
+                                    "totalFlakyFailCount": 0,
+                                    "totalSkipCount": 0,
+                                    "totalPassCount": 70,
+                                }
+                            },
+                            {
+                                "node": {
+                                    "updatedAt": "2025-05-22T16:21:18.763961+00:00",
+                                    "avgDuration": 0.034125877192982455,
+                                    "name": "../usr/local/lib/python3.13/site-packages/asgiref/sync.py::GetFinalYamlInteractorTest::test_when_commit_has_yaml",
+                                    "failureRate": 0.0,
+                                    "flakeRate": 0.0,
+                                    "commitsFailed": 0,
+                                    "totalFailCount": 0,
+                                    "totalFlakyFailCount": 0,
+                                    "totalSkipCount": 0,
+                                    "totalPassCount": 70,
+                                }
+                            },
+                        ],
+                    }
+                },
+            }
+        }
+    }
+}
+
+
+@region_silo_endpoint
+class TestResultsEndpoint(CodecovEndpoint):
+    owner = ApiOwner.CODECOV
+    publish_status = {
+        "GET": ApiPublishStatus.PUBLIC,
+    }
+
+    # Disable pagination requirement for this endpoint
+    def has_pagination(self, response):
+        return True
+
+    def get(self, request: Request, owner: str, repository: str) -> Response:
+        """Retrieves the list of test results for a given commit."""
+
+        variables = {
+            "owner": owner,
+            "repo": repository,
+        }
+
+        assert variables
+
+        graphql_response = CodecovApiClient.query(query, variables)
+
+        graphql_response = sample_graphql_response  # Mock response for now
+
+        test_results = TestResultSerializer().to_representation(graphql_response)
+
+        return Response(test_results)
diff --git a/tests/sentry/codecov/endpoints/test_test_results.py b/tests/sentry/codecov/endpoints/test_test_results.py
new file mode 100644
index 00000000000000..2166c4090f5806
--- /dev/null
+++ b/tests/sentry/codecov/endpoints/test_test_results.py
@@ -0,0 +1,59 @@
+from unittest.mock import patch
+
+from django.urls import reverse
+
+from sentry.testutils.cases import APITestCase
+
+
+class TestResultsEndpointTest(APITestCase):
+    endpoint = "sentry-api-0-test-results"
+
+    def setUp(self):
+        super().setUp()
+        self.login_as(user=self.user)
+
+    def reverse_url(self, owner="testowner", repository="testrepo", commit="testcommit"):
+        """Custom reverse URL method to handle required URL parameters"""
+        return reverse(
+            self.endpoint,
+            kwargs={
+                "owner": owner,
+                "repository": repository,
+                "commit": commit,
+            },
+        )
+
+    @patch(
+        "sentry.codecov.endpoints.TestResults.test_results.TestResultsEndpoint.permission_classes",
+        (),
+    )
+    def test_get_returns_mock_response(self):
+        """Test that GET request returns the expected mock GraphQL response structure"""
+        url = self.reverse_url()
+        response = self.client.get(url)
+
+        # With permissions bypassed, we should get a 200 response
+        assert response.status_code == 200
+
+        # Validate the response structure
+        assert isinstance(response.data, list)
+        # The sample response should contain 2 test result items
+        assert len(response.data) == 2
+
+        # Verify the first result has expected fields and values
+        first_result = response.data[0]
+        expected_fields = [
+            "updatedAt",
+            "name",
+            "avgDuration",
+            "failureRate",
+            "flakeRate",
+            "commitsFailed",
+            "totalFailCount",
+            "totalFlakyFailCount",
+            "totalSkipCount",
+            "totalPassCount",
+            "lastDuration",
+        ]
+        for field in expected_fields:
+            assert field in first_result, f"Missing field: {field}"