wyolet-api-tools

Stateful FastAPI primitives — rate limit, distributed lock, idempotency keys — sharing one Backend protocol. Memory or Redis today; sqlite and postgres on the roadmap.

First package under the wyolet umbrella.

uv add wyolet-api-tools

Why

Every FastAPI project ends up reinventing the same primitives. The existing packages are each scoped to one of them — slowapi for rate limiting, redlock-py for locks, aiocache for caching — each with its own backend abstraction and lifecycle quirks. wyolet.api_tools unifies them: write one backend, get every primitive that needs state.

Quickstart

from fastapi import FastAPI, Depends
from wyolet.api_tools.backends.redis import RedisBackend
from wyolet.api_tools.ratelimit import RateLimit
from wyolet.api_tools.lock import Lock
from wyolet.api_tools.idempotency import Idempotency

backend = RedisBackend("redis://localhost")

app = FastAPI()

@app.post("/transfer", dependencies=[Depends(RateLimit(backend, "10/minute"))])
async def transfer(...):
    async with Lock(backend, key=f"user:{user_id}", ttl=30):
        ...

@app.post("/charge", dependencies=[Depends(Idempotency(backend, ttl=3600))])
async def charge(...):
    ...

Backends

Bring-your-own backend by implementing the Backend protocol — every primitive in this package will work with it.

Status

Pre-alpha. v0.1 ships rate limit, distributed lock, idempotency on memory + redis. Roadmap: dedup, OTP, feature flags, cache decorator, circuit breaker, retry, outbound throttle, pool/health composers.

License

TBD.