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

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.

agentmods
npx agentmods add rules/dewtech-technologies/dare-method/skill-fastapi-api
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.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.svg" alt="Measured on agentmods" 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. Scan, not verified.
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 $0.00000 $0.02410
Opus 5 $0.00000 $0.01205
Sonnet 5 $0.00000 $0.00482
Haiku 4.5 $0.00000 $0.00241

Measured yesterday against content hash 72adc36a5757, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 yesterday.

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. yesterday 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 1mo 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.