Fastapi Router Py

What it does

When your agent uses it

• Building REST API endpoints
• Creating new routes
• Implementing CRUD operations
• Adding authenticated endpoints in FastAPI applications

Example prompts

• “/fastapi-router-py”

Requirements

• Python 3

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

1. 1Create router in src/backend/app/routers/
2. 2Mount in src/backend/app/main.py
3. 3Create corresponding Pydantic models
4. 4Create service layer if needed
5. 5Add frontend API functions

What it can do on your machine

Read from SKILL.md and the folder at commit 354361d. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Ships script files (Python), which the agent can run.

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Fastapi Router Py loads about 568 tokens when it runs, and up to ~802 if it reads all its reference files. Until then it costs about 67 tokens; SKILL.md has 136 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~67

When it runs · the whole SKILL.md, loaded when a task matches

~568

With references · SKILL.md plus every file in references/, read only if the agent opens them

~802

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from microsoft/skills at commit 354361d, republished under its MIT licence (© microsoft). 136 words, ~568 tokens.

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 adding authenticated endpoints in FastAPI applications.

license

MIT

metadata.author

Microsoft

metadata.version

1.0.0

# 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)

@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]:
    ...

@router.post("/items", status_code=status.HTTP_201_CREATED)
async def create_item(item: ItemCreate) -> Item:
  ...

@router.delete("/items/{id}", status_code=status.HTTP_204_NO_CONTENT)
async def delete_item(id: str) -> None:
  ...

© microsoft, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files (references, assets) in .github/plugins/azure-sdk-python/skills/fastapi-router-py of microsoft/skills.

• SKILL.md
• assets/template.py
• references/capabilities.md

Open the folder on GitHubat commit 354361d

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in microsoft/skills, which our catalogue first saw on October 7, 2026.

• majiayu000/claude-skill-registryskills/api/fastapi-router-py