diff --git a/services/api-server/src/simcore_service_api_server/api/errors/http_error.py b/services/api-server/src/simcore_service_api_server/api/errors/http_error.py
index 07e754f202cd..260bfc408888 100644
--- a/services/api-server/src/simcore_service_api_server/api/errors/http_error.py
+++ b/services/api-server/src/simcore_service_api_server/api/errors/http_error.py
@@ -1,20 +1,11 @@
 from collections.abc import Callable
-from typing import Any
 
 from fastapi import HTTPException
 from fastapi.encoders import jsonable_encoder
-from pydantic import BaseModel
 from starlette.requests import Request
 from starlette.responses import JSONResponse
 
-
-class ErrorGet(BaseModel):
-    # We intentionally keep it open until more restrictive policy is implemented
-    # Check use cases:
-    #   - https://github.com/ITISFoundation/osparc-issues/issues/958
-    #   - https://github.com/ITISFoundation/osparc-simcore/issues/2520
-    #   - https://github.com/ITISFoundation/osparc-simcore/issues/2446
-    errors: list[Any]
+from ...models.schemas.errors import ErrorGet
 
 
 def create_error_json_response(*errors, status_code: int) -> JSONResponse:
diff --git a/services/api-server/src/simcore_service_api_server/api/routes/studies.py b/services/api-server/src/simcore_service_api_server/api/routes/studies.py
index 1349ff6eaf6f..59dae8ed31e2 100644
--- a/services/api-server/src/simcore_service_api_server/api/routes/studies.py
+++ b/services/api-server/src/simcore_service_api_server/api/routes/studies.py
@@ -24,6 +24,7 @@
 
 
 def _create_study_from_project(project: ProjectGet) -> Study:
+    assert isinstance(project, ProjectGet)  # nosec
     return Study.construct(
         uid=project.uuid,
         title=project.name,
@@ -33,7 +34,7 @@ def _create_study_from_project(project: ProjectGet) -> Study:
 
 
 @router.get(
-    "/",
+    "",
     response_model=LimitOffsetPage[Study],
     include_in_schema=API_SERVER_DEV_FEATURES_ENABLED,
 )
diff --git a/services/api-server/src/simcore_service_api_server/models/schemas/errors.py b/services/api-server/src/simcore_service_api_server/models/schemas/errors.py
new file mode 100644
index 000000000000..5d830facc917
--- /dev/null
+++ b/services/api-server/src/simcore_service_api_server/models/schemas/errors.py
@@ -0,0 +1,12 @@
+from typing import Any
+
+from pydantic import BaseModel
+
+
+class ErrorGet(BaseModel):
+    # We intentionally keep it open until more restrictive policy is implemented
+    # Check use cases:
+    #   - https://github.com/ITISFoundation/osparc-issues/issues/958
+    #   - https://github.com/ITISFoundation/osparc-simcore/issues/2520
+    #   - https://github.com/ITISFoundation/osparc-simcore/issues/2446
+    errors: list[Any]