skill-fastapi-api

skill-fastapi-api is a cursor rule for Cursor from dewtech-technologies/dare-method. It costs 0 tokens per session (2,410 once invoked), scanned A, original, MIT.

A set of rules for building REST APIs in Python with FastAPI, Pydantic, SQLAlchemy, and PostgreSQL. FastAPI is a Python web framework that can automatically describe an API for other tools and developers.

In plain words
What is it for?
It is for creating asynchronous Python APIs with JWT-based login, database migrations, generated OpenAPI documentation, and automated tests.
Why use it?
It provides a consistent place for request validation, authentication, database access, business logic, rate limiting, and tests.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/.

Good fit It is for creating asynchronous Python APIs with JWT-based login, database migrations, generated OpenAPI documentation, and automated tests.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/dewtech-technologies/dare-method/skill-fastapi-api
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/dewtech-technologies/dare-method

Made for: Cursor.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for skill-fastapi-api

README.md
[![agentmods](https://agentmods.dev/badge/rules/dewtech-technologies/dare-method/skill-fastapi-api/github.svg)](https://agentmods.dev/rules/dewtech-technologies/dare-method/skill-fastapi-api)
Your own site
<a href="https://agentmods.dev/rules/dewtech-technologies/dare-method/skill-fastapi-api"><img src="https://agentmods.dev/badge/rules/dewtech-technologies/dare-method/skill-fastapi-api/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for skill-fastapi-api

Your own site · 80×15
<a href="https://agentmods.dev/rules/dewtech-technologies/dare-method/skill-fastapi-api"><img src="https://agentmods.dev/badge/rules/dewtech-technologies/dare-method/skill-fastapi-api.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 2,410 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.02410
Opus 5.5 $0.00000 $0.00964
Sonnet 5.5 $0.00000 $0.00482
Haiku 4.5 $0.00000 $0.00241

Measured 1mo ago against content hash 72adc36a5757, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

skill-fastapi-api scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

implementations/cursor/.cursor/rules/skill-fastapi-api.mdc · 353 lines

How it starts

The opening of the file, as written. The whole thing — 353 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill: FastAPI API DARE

Você é um desenvolvedor sênior Python especialista em APIs REST com FastAPI. Esta skill garante código assíncrono, fortemente tipado (Pydantic v2), com OpenAPI auto-gerado, auth/autz robustos, seguindo Layered Design DARE.

Stack canônica

  • Python 3.11+ com type hints obrigatórios
  • FastAPI 0.115+ com async/await
  • Pydantic v2 para schemas
  • SQLAlchemy 2.0 async + asyncpg (PostgreSQL)
  • alembic para migrations
  • passlib + argon2 para hash de senhas
  • python-jose ou PyJWT para JWT
  • slowapi para rate limiting
  • pytest + pytest-asyncio + httpx
  • ruff (lint + format) + mypy

Estrutura de pastas

app/
├── main.py                       ← FastAPI app + middlewares
├── core/
│   ├── config.py                 ← pydantic-settings
│   └── security.py               ← hash, JWT
├── api/
│   ├── deps.py                   ← Depends() comuns
│   └── v1/
│       ├── users.py              ← Handler (router)
│       └── auth.py
├── services/                     ← Service layer
├── repositories/                 ← Repository layer
├── models/                       ← SQLAlchemy ORM
├── schemas/                      ← Pydantic DTOs
└── tests/

Routers (Handler)

from fastapi import APIRouter, Depends, HTTPException, status
from app.api.deps import get_current_user
from app.schemas.user import UserCreate, UserOut
from app.services.register_user import RegisterUser, UserAlreadyExistsError

router = APIRouter(prefix="/users", tags=["users"])

@router.post("", response_model=UserOut, status_code=status.HTTP_201_CREATED)
async def create_user(
    payload: UserCreate,
    service: RegisterUser = Depends(),
    _current: User = Depends(get_current_user),
):
    try:
        return await service.execute(payload)
    except UserAlreadyExistsError:
        raise HTTPException(status_code=409, detail="User already exists")

Regras:

  • Apenas: valida via Pydantic → chama Service → retorna response_model
  • NUNCA: SQLAlchemy direto, lógica de negócio, validação manual

Read the full file on GitHub · 353 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 353 lines · 2,410 tokens per session scan A 72adc36a5757

Subscribe to this mod's changes

skill-fastapi-api is a cursor rule published in the GitHub repository dewtech-technologies/dare-method (5 stars, last pushed 3mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,410 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.