diff --git a/apps/api/app/api/routes/projects.py b/apps/api/app/api/routes/projects.py
index 5939c53ee..e77c9ab36 100644
--- a/apps/api/app/api/routes/projects.py
+++ b/apps/api/app/api/routes/projects.py
@@ -7,6 +7,7 @@ from app.schemas.project import (
     ListProjectsResponse,
     ProjectResponse,
 )
+from app.api.routes.permissions import require_workspace_member
 from fastapi import APIRouter, Depends, HTTPException, status
 
 from packages.application import (
@@ -20,16 +21,6 @@ from packages.ports.workspace_member_repository import WorkspaceMemberRepository
 router = APIRouter()
 
 
-def _require_workspace_member(
-    workspace_id: str,
-    authenticated_user: AuthenticatedUser,
-    workspace_member_repository: WorkspaceMemberRepository,
-) -> None:
-    member = workspace_member_repository.find_by_workspace_and_user(workspace_id, authenticated_user.user.id)
-    if member is None:
-        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="Workspace access denied")
-
-
 def _to_project_response(item) -> ProjectResponse:
     return ProjectResponse(
         id=item.id,
@@ -50,7 +41,7 @@ def get_project(
     project = use_case.execute(project_id)
     if project is None:
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Project not found")
-    _require_workspace_member(project.workspace_id, authenticated_user, workspace_member_repository)
+    require_workspace_member(project.workspace_id, authenticated_user, workspace_member_repository)
     return _to_project_response(project)
 
 
@@ -61,7 +52,7 @@ def list_projects(
     project_repository: Any = Depends(get_project_repository),
     workspace_member_repository: WorkspaceMemberRepository = Depends(get_workspace_member_repository),
 ) -> ListProjectsResponse:
-    _require_workspace_member(workspace_id, authenticated_user, workspace_member_repository)
+    require_workspace_member(workspace_id, authenticated_user, workspace_member_repository)
     use_case = ListProjectsUseCase(project_repository)
     projects = use_case.execute(workspace_id)
     return ListProjectsResponse(items=[_to_project_response(item) for item in projects])
@@ -74,7 +65,7 @@ def create_project(
     project_repository: Any = Depends(get_project_repository),
     workspace_member_repository: WorkspaceMemberRepository = Depends(get_workspace_member_repository),
 ) -> ProjectResponse:
-    _require_workspace_member(request.workspace_id, authenticated_user, workspace_member_repository)
+    require_workspace_member(request.workspace_id, authenticated_user, workspace_member_repository)
     use_case = CreateProjectUseCase(project_repository)
     project = use_case.execute(
         CreateProjectCommand(