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fastapi-router-py

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by microsoft · part of microsoft/skills

Create FastAPI routers with CRUD operations, authentication dependencies, and proper response models. Use when building REST API endpoints, creating new…

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🧩 One of 7 skills in the microsoft/skills package — works on its own, and pairs well with its siblings.

Create FastAPI routers with CRUD operations, authentication dependencies, and proper response models. Use when building REST API endpoints, creating new…

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by microsoft

Create FastAPI routers with CRUD operations, authentication dependencies, and proper response models. Use when building REST API endpoints, creating new… npx skills add https://github.com/microsoft/agent-skills --skill fastapi-router-py Download ZIPGitHub2.7k

FastAPI Router

Create FastAPI routers following established patterns with proper authentication, response models, and HTTP status codes.

Authentication Patterns

Copy & paste — that's it
# Optional auth - returns None if not authenticated
current_user: Optional[User] = Depends(get_current_user)

# Required auth - raises 401 if not authenticated
current_user: User = Depends(get_current_user_required)

Response Models

Copy & paste — that's it
@router.get("/items/{item_id}", response_model=Item)
async def get_item(item_id: str) -> Item:
 ...

@router.get("/items", response_model=list[Item])
async def list_items() -> list[Item]:
 ...

HTTP Status Codes

Copy & paste — that's it
@router.post("/items", status_code=status.HTTP_201_CREATED)
@router.delete("/items/{id}", status_code=status.HTTP_204_NO_CONTENT)

Integration Steps

  • Create router in src/backend/app/routers/

  • Mount in src/backend/app/main.py

  • Create corresponding Pydantic models

  • Create service layer if needed

  • Add frontend API functions

Best Practices

  • Pick def or async def per endpoint based on whether you call async I/O; do not mix sync and async blocking calls in one handler.

  • Manage long-lived resources (DB pools, HTTP clients) in lifespan and inject via Depends; use with/async with for per-request resources.