diff --git a/services/api-server/src/simcore_service_api_server/api/routes/files.py b/services/api-server/src/simcore_service_api_server/api/routes/files.py
index 91b6da3b910..1bc5802854a 100644
--- a/services/api-server/src/simcore_service_api_server/api/routes/files.py
+++ b/services/api-server/src/simcore_service_api_server/api/routes/files.py
@@ -3,7 +3,7 @@
 import io
 import logging
 from textwrap import dedent
-from typing import IO, Annotated
+from typing import IO, Annotated, Final
 from uuid import UUID
 
 from fastapi import APIRouter, Depends
@@ -42,7 +42,7 @@
 #
 #
 
-_common_error_responses = {
+_COMMON_ERROR_RESPONSES: Final[dict] = {
     status.HTTP_404_NOT_FOUND: {
         "description": "File not found",
         "model": ErrorGet,
@@ -170,7 +170,7 @@ async def upload_files(files: list[UploadFile] = FileParam(...)):
     raise NotImplementedError
 
 
-@router.get("/{file_id}", response_model=File, responses={**_common_error_responses})
+@router.get("/{file_id}", response_model=File, responses={**_COMMON_ERROR_RESPONSES})
 async def get_file(
     file_id: UUID,
     storage_client: Annotated[StorageApi, Depends(get_api_client(StorageApi))],
@@ -203,7 +203,7 @@ async def get_file(
 @router.delete(
     "/{file_id}",
     status_code=status.HTTP_204_NO_CONTENT,
-    responses={**_common_error_responses},
+    responses={**_COMMON_ERROR_RESPONSES},
     include_in_schema=API_SERVER_DEV_FEATURES_ENABLED,
 )
 async def delete_file(
@@ -221,7 +221,7 @@ async def delete_file(
     "/{file_id}/content",
     response_class=RedirectResponse,
     responses={
-        **_common_error_responses,
+        **_COMMON_ERROR_RESPONSES,
         200: {
             "content": {
                 "application/octet-stream": {
diff --git a/services/api-server/src/simcore_service_api_server/api/routes/solvers_jobs.py b/services/api-server/src/simcore_service_api_server/api/routes/solvers_jobs.py
index b7a6155151f..6ff05c9b8c0 100644
--- a/services/api-server/src/simcore_service_api_server/api/routes/solvers_jobs.py
+++ b/services/api-server/src/simcore_service_api_server/api/routes/solvers_jobs.py
@@ -3,7 +3,7 @@
 import logging
 from collections import deque
 from collections.abc import Callable
-from typing import Annotated
+from typing import Annotated, Final
 from uuid import UUID
 
 from fastapi import APIRouter, Depends, status
@@ -65,7 +65,7 @@ def _compose_job_resource_name(solver_key, solver_version, job_id) -> str:
 # - Similar to docker container's API design (container = job and image = solver)
 #
 
-_common_error_responses = {
+_COMMON_ERROR_RESPONSES: Final[dict] = {
     status.HTTP_404_NOT_FOUND: {
         "description": "Job not found",
         "model": ErrorGet,
@@ -443,7 +443,7 @@ async def get_job_output_logfile(
 @router.get(
     "/{solver_key:path}/releases/{version}/jobs/{job_id:uuid}/metadata",
     response_model=JobMetadata,
-    responses={**_common_error_responses},
+    responses={**_COMMON_ERROR_RESPONSES},
     include_in_schema=API_SERVER_DEV_FEATURES_ENABLED,
 )
 async def get_job_custom_metadata(
@@ -484,7 +484,7 @@ async def get_job_custom_metadata(
 @router.patch(
     "/{solver_key:path}/releases/{version}/jobs/{job_id:uuid}/metadata",
     response_model=JobMetadata,
-    responses={**_common_error_responses},
+    responses={**_COMMON_ERROR_RESPONSES},
     include_in_schema=API_SERVER_DEV_FEATURES_ENABLED,
 )
 async def replace_job_custom_metadata(
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 50d3b217eb2..ec3ddb7d0f4 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
@@ -1,5 +1,5 @@
 import logging
-from typing import Annotated, Any
+from typing import Annotated, Any, Final
 
 from fastapi import APIRouter, Depends, status
 from fastapi_pagination.api import create_page
@@ -16,7 +16,7 @@
 _logger = logging.getLogger(__name__)
 router = APIRouter()
 
-_common_error_responses = {
+_COMMON_ERROR_RESPONSES: Final[dict] = {
     status.HTTP_404_NOT_FOUND: {
         "description": "Study not found",
         "model": ErrorGet,
@@ -65,7 +65,7 @@ async def list_studies(
 @router.get(
     "/{study_id}",
     response_model=Study,
-    responses={**_common_error_responses},
+    responses={**_COMMON_ERROR_RESPONSES},
     include_in_schema=API_SERVER_DEV_FEATURES_ENABLED,
 )
 async def get_study(
@@ -90,7 +90,7 @@ async def get_study(
 @router.get(
     "/{study_id}/ports",
     response_model=OnePage[StudyPort],
-    responses={**_common_error_responses},
+    responses={**_COMMON_ERROR_RESPONSES},
     include_in_schema=API_SERVER_DEV_FEATURES_ENABLED,
 )
 async def list_study_ports(