Flask-Limiter

Install

flask-limiter on PyPI

pip install flask-limiter

uv add flask-limiter

poetry add flask-limiter

Package facts

Evidence: flask_limiter-4.1.1-py3-none-any.whl

About Flask-Limiter

from the package's own PyPI description — quoted content, verbatim

Read as markdown · JSON record · Source repository · Homepage · Docs

AI interpretation — verify before relying

AI-generated interpretation of the package facts above; every digit, version, license, or vulnerability id it cites is grounded in the facts already shown on this page

Flask-Limiter adds rate limiting to Flask applications, allowing you to enforce request quotas at global, per-route, blueprint, or class-based view levels with support for multiple storage backends like Redis, Memcached, and MongoDB.

Low install friction with a pure-Python wheel and only four runtime dependencies. The package is actively maintained with a recent release (2025-12-06) and 1204 repository stars, indicating stable, well-supported code.

MIT license (permissive) means you can use, modify, and distribute this package with minimal restrictions, even in commercial applications.

pip install Flask-Limiter

from flask import Flask
from flask_limiter import Limiter
from flask_limiter.util import get_remote_address

app = Flask(__name__)
limiter = Limiter(get_remote_address, app=app, default_limits=["2 per minute"], storage_uri="memory://")

@app.route("/api")
@limiter.limit("1 per second")
def api():
    return "OK"

Verdict: Flask-Limiter is a production-stable, actively maintained rate-limiting library for Flask with low install friction, MIT licensing, and no known vulnerabilities. It supports flexible configuration across multiple storage backends and is well-suited for protecting Flask applications from abuse.

Needs verification

• Whether the memory:// storage backend is suitable for production multi-process deployments
• Performance characteristics under high concurrency with different storage backends

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