diff --git a/src/sentry/api/endpoints/admin_project_configs.py b/src/sentry/api/endpoints/admin_project_configs.py
new file mode 100644
index 00000000000000..b2f57cda22dfaa
--- /dev/null
+++ b/src/sentry/api/endpoints/admin_project_configs.py
@@ -0,0 +1,43 @@
+from django.http import Http404
+from rest_framework.request import Request
+from rest_framework.response import Response
+
+from sentry.api.base import Endpoint, pending_silo_endpoint
+from sentry.api.permissions import SuperuserPermission
+from sentry.models import Project
+from sentry.relay import projectconfig_cache
+
+
+@pending_silo_endpoint
+class AdminRelayProjectConfigsEndpoint(Endpoint):
+    private = True
+    permission_classes = (SuperuserPermission,)
+
+    def get(self, request: Request) -> Response:
+        project_id = request.GET.get("projectId")
+
+        project_keys = []
+        if project_id is not None:
+            try:
+                project = Project.objects.get_from_cache(id=project_id)
+                for project_key in project.key_set.all():
+                    project_keys.append(project_key.public_key)
+
+            except Exception:
+                raise Http404
+
+        project_key = request.GET.get("projectKey")
+        if project_key is not None:
+            project_keys.append(project_key)
+
+        configs = {}
+        for key in project_keys:
+            cached_config = projectconfig_cache.get(key)
+            if cached_config is not None:
+                configs[key] = cached_config
+            else:
+                configs[key] = None
+
+        # TODO if we don't think we'll add anything to the endpoint
+        # we may as well return just the configs
+        return Response({"configs": configs}, status=200)
diff --git a/src/sentry/api/urls.py b/src/sentry/api/urls.py
index 73b870bc2b0bb4..0d54ba8eaceeb5 100644
--- a/src/sentry/api/urls.py
+++ b/src/sentry/api/urls.py
@@ -69,6 +69,7 @@
 
 from .endpoints.accept_organization_invite import AcceptOrganizationInvite
 from .endpoints.accept_project_transfer import AcceptProjectTransferEndpoint
+from .endpoints.admin_project_configs import AdminRelayProjectConfigsEndpoint
 from .endpoints.api_application_details import ApiApplicationDetailsEndpoint
 from .endpoints.api_applications import ApiApplicationsEndpoint
 from .endpoints.api_authorizations import ApiAuthorizationsEndpoint
@@ -2485,6 +2486,11 @@
                 url(r"^packages/$", InternalPackagesEndpoint.as_view()),
                 url(r"^environment/$", InternalEnvironmentEndpoint.as_view()),
                 url(r"^mail/$", InternalMailEndpoint.as_view()),
+                url(
+                    r"^project-config/$",
+                    AdminRelayProjectConfigsEndpoint.as_view(),
+                    name="sentry-api-0-internal-project-config",
+                ),
             ]
         ),
     ),
diff --git a/tests/sentry/api/endpoints/test_admin_project_configs.py b/tests/sentry/api/endpoints/test_admin_project_configs.py
new file mode 100644
index 00000000000000..8a45fee22550dd
--- /dev/null
+++ b/tests/sentry/api/endpoints/test_admin_project_configs.py
@@ -0,0 +1,139 @@
+from urllib import parse
+
+from django.urls import reverse
+from rest_framework import status
+
+from sentry.relay import projectconfig_cache
+from sentry.testutils import APITestCase
+from sentry.testutils.silo import no_silo_test
+
+
+@no_silo_test
+class AdminRelayProjectConfigsEndpointTest(APITestCase):
+    def setUp(self):
+        super().setUp()
+        self.owner = self.create_user(
+            email="example@example.com", is_superuser=False, is_staff=True, is_active=True
+        )
+        self.org = self.create_organization(owner=self.owner)
+        self.first_team = self.create_team(organization=self.org)
+        self.proj1 = self.create_project(
+            name="proj1", organization=self.org, teams=[self.first_team]
+        )
+        self.proj2 = self.create_project(
+            name="proj2", organization=self.org, teams=[self.first_team]
+        )
+        self.superuser = self.create_user(
+            "superuser@example.com", is_superuser=True, is_staff=True, is_active=True
+        )
+        self.path = "sentry-api-0-internal-project-config"
+
+        self.p1_pk = self.create_project_key(self.proj1)
+        self.p2_pk = self.create_project_key(self.proj2)
+
+        projectconfig_cache.set_many(
+            {
+                self.p1_pk.public_key: "proj1 config",
+            }
+        )
+
+    def get_url(self, proj_id=None, key=None):
+        query = {}
+        if proj_id is not None:
+            query["projectId"] = proj_id
+        if key is not None:
+            query["projectKey"] = key
+
+        query_string = parse.urlencode(query)
+
+        ret_val = reverse(self.path)
+        ret_val += f"?{query_string}"
+        return ret_val
+
+    def test_normal_users_do_not_have_access(self):
+        """
+        Request denied for non super-users
+        """
+        self.login_as(self.owner)
+
+        url = self.get_url(proj_id=self.proj1.id)
+        response = self.client.get(url)
+
+        assert response.status_code == status.HTTP_403_FORBIDDEN
+
+    def test_retrieving_project_configs(self):
+        """
+        Asking for a project will return all project configs from all public
+        keys in redis
+        """
+        self.login_as(self.superuser, superuser=True)
+
+        url = self.get_url(proj_id=self.proj1.id)
+        response = self.client.get(url)
+
+        assert response.status_code == status.HTTP_200_OK
+        expected = {"configs": {self.p1_pk.public_key: "proj1 config"}}
+        actual = response.json()
+        assert actual == expected
+
+    def test_retrieving_public_key_configs(self):
+        """
+        Asking for a particular public key will return only the project config
+        for that public key
+        """
+        self.login_as(self.superuser, superuser=True)
+
+        url = self.get_url(key=self.p1_pk.public_key)
+        response = self.client.get(url)
+
+        assert response.status_code == status.HTTP_200_OK
+        expected = {"configs": {self.p1_pk.public_key: "proj1 config"}}
+        actual = response.json()
+        assert actual == expected
+
+    def test_uncached_project(self):
+        """
+        Asking for a project that was not cached in redis will return
+        an empty marker
+        """
+        expected = {"configs": {self.p2_pk.public_key: None}}
+
+        self.login_as(self.superuser, superuser=True)
+
+        url = self.get_url(proj_id=self.proj2.id)
+        response = self.client.get(url)
+        assert response.status_code == status.HTTP_200_OK
+        actual = response.json()
+        assert actual == expected
+
+        url = self.get_url(key=self.p2_pk.public_key)
+        response = self.client.get(url)
+        assert response.status_code == status.HTTP_200_OK
+        actual = response.json()
+        assert actual == expected
+
+    def test_inexistent_project(self):
+        """
+        Asking for an inexitent project will return 404
+        """
+        inexistent_project_id = 2 ^ 32
+        self.login_as(self.superuser, superuser=True)
+
+        url = self.get_url(proj_id=inexistent_project_id)
+        response = self.client.get(url)
+        assert response.status_code == status.HTTP_404_NOT_FOUND
+
+    def test_inexistent_key(self):
+        """
+        Asking for an inexistent project key will return an empty result
+        """
+        inexsitent_key = 123
+        self.login_as(self.superuser, superuser=True)
+
+        url = self.get_url(key=inexsitent_key)
+        response = self.client.get(url)
+
+        assert response.status_code == status.HTTP_200_OK
+        expected = {"configs": {str(inexsitent_key): None}}
+        actual = response.json()
+        assert actual == expected