Rate Limiting Python Packages

limits

Rate limiting using various strategies and storage backends such as redis, memcached & mongodb

flask-limiter

Rate Limiting extension for Flask

aiolimiter

An efficient implementation of a rate limiter for asyncio.

ratelimit

API Rate Limit Decorator

pyrate-limiter

⚔️Python Rate-Limiter using Leaky-Bucket Algorithm Family

requests-ratelimiter

Easy rate-limiting for python requests

throttled-py

🔧 High-performance Python rate limiting library with multiple algorithms (Fixed Window, Sliding Window, Token Bucket, Leaky Bucket & GCRA) and storage backends (Redis, In-Memory).

celery-singleton

Seamlessly prevent duplicate executions of celery tasks

loop-rate-limiters

Loop rate limiters in Python with an API similar to rospy.Rate

pydantic-ai-shields

Guardrail capabilities for Pydantic AI — cost tracking, prompt injection detection, PII filtering, secret redaction, tool permissions, and async guardrails. Built on pydantic-ai's native capabilities API.

piccolo-api

ASGI middleware for authentication, rate limiting, and building REST endpoints.

rush

Modular, way of implementing rate-limiting in python with a few handy default implementations

python-redis-rate-limit

Python Rate Limiter implemented based on Redis INCR, EXPIRE, EVALSHA and EVAL.

upstash-ratelimit

Rate limiting library for serverless runtimes in Python

pydantic-ai-middleware

Guardrail capabilities for Pydantic AI — cost tracking, prompt injection detection, PII filtering, secret redaction, tool permissions, and async guardrails. Built on pydantic-ai's native capabilities API.

limiter

⏲️ Easy rate limiting for Python using a token bucket algorithm, with async and thread-safe decorators and context managers

mthrottle

A simple and generic rate limiter to prevent too many function calls or http requests.

arcjet

Arcjet Python SDK. Stop bots and automated attacks from burning your AI budget, leaking data, or misusing tools with Arcjet's AI security building blocks.

endpointscanner

Website endpoint recon tool and rate limit tester that can bypass simple captchas and WAFs.

freellmpool

Free LLM API pool: 19 LLM providers cataloged, 235 routes, 355 cataloged chat models, keyless start when available.

flowwatch-client

One npm package. Durable workflows, feature flags, auth, request tracing, rate limiting, caching, metrics, webhooks, CRON, and more — all self-hosted on your own Postgres and Redis. No SaaS. No monthly bill.

aiorate

Loop frequency regulation for asyncio

arcis

Inside-the-app security middleware for Node.js, Python, and Go. 20+ attack vectors. One install, three languages, MIT.

token-throttle

Simple Multi-Resource Rate Limiting That Saves Unused Tokens. Rate limit API requests across different resources and workers without wasting your quota. Reserve tokens upfront, get refunds for what you don't use, and avoid over-limiting.