fastapi-easylimiter 0.1.5

High-performance async rate limiter for FastAPI with Redis or native in-memory backend

fastapi-easylimiter

Simple async rate-limiting middleware for FastAPI with Redis or in-memory caching.

Simple design

• Async rate limiting
• Redis or in-memory cache
• Easy rules per URL paths.
• Optional rate limit headers (X-RateLimit-Limit, X-RateLimit-Remaining, Retry-After)

Installation

pip install fastapi-easylimiter

---

Usage

from fastapi import FastAPI
from fastapi_easylimiter import AsyncRedisBackend, InMemoryBackend, RateLimiterMiddleware
import redis.asyncio as redis_async

app = FastAPI()

REDIS_URL = "redis://localhost:6379/0"

# Redis backend (recommended for multi-instance deployments)
redis_client = redis_async.from_url(REDIS_URL, decode_responses=True)
backend = AsyncRedisBackend(redis_client)

# Or for single-instance/local development:
# backend = InMemoryBackend()

rules = {
    "/api/users": {"limit": 1, "period": 2},
    "/api/": {"limit": 60, "period": 60}, # GLOBAL ONES GO LAST
}

app.add_middleware(
    RateLimiterMiddleware,
    rules=rules,
    backend=backend,
    backoff_threshold=3,
    max_backoff=60
)

Contributing

Contributions and forks are always welcome! Feel free to adapt, improve, or extend this middleware for your own needs. This was purely made out of personal necessity.

Support