---
name: fastapi-router-py
description: "Create FastAPI routers with CRUD operations, authentication dependencies, and proper response models. Use when building REST API endpoints, creating new routes, implementing CRUD operations, or add..."
risk: unknown
source: community
---
# FastAPI Router
Create FastAPI routers following established patterns with proper authentication, response models, and HTTP status codes.
## Quick Start
Copy the template from assets/template.py and replace placeholders:
- `{{ResourceName}}` → PascalCase name (e.g., `Project`)
- `{{resource_name}}` → snake_case name (e.g., `project`)
- `{{resource_plural}}` → plural form (e.g., `projects`)
## Authentication Patterns
```python
# 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
```python
@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
```python
@router.post("/items", status_code=status.HTTP_201_CREATED)
@router.delete("/items/{id}", status_code=status.HTTP_204_NO_CONTENT)
```
## Integration Steps
1. Create router in `src/backend/app/routers/`
2. Mount in `src/backend/app/main.py`
3. Create corresponding Pydantic models
4. Create service layer if needed
5. Add frontend API functions
## When to Use
This skill is applicable to execute the workflow or actions described in the overview.