Muffin – fast, lightweight, and asynchronous ASGI web framework for Python 3.11+.

Why Muffin?

Muffin combines the simplicity of microframeworks with native ASGI performance, supporting multiple async libraries (Asyncio, Trio, Curio) out of the box. Its rich plugin ecosystem makes building modern web applications pleasant and efficient.

Key Features

ASGI compatible
Competitive performance ([Benchmarks](http://klen.github.io/py-frameworks-bench/))
Supports Asyncio, Trio, and Curio
Multiple response types: text, HTML, JSON, streams, files, SSE, WebSockets
First-class plugin system for templating, databases, auth, and more

Installation

Muffin requires Python 3.11 or newer. We recommend using the latest stable Python.

Install via pip:

$ pip install muffin

For the standard installation with gunicorn, uvicorn, uvloop, httptools:

$ pip install muffin[standard]

Dependencies

These packages will be installed automatically:

ASGI-Tools – ASGI toolkit
Modconfig – hierarchical configuration manager

Quickstart

Create a simple "Hello User" app:

import muffin
app = muffin.Application()
@app.route('/', '/hello/{name}')
async def hello(request):
    name = request.path_params.get('name', 'world')
    return f'Hello, {name.title()}!'

Save this as example.py and run:

$ uvicorn example:app

Visit http://localhost:8000 or http://localhost:8000/hello/username in your browser.

Plugins

Muffin has a rich ecosystem of plugins:

[muffin-jinja2](https://github.com/klen/muffin-jinja2) – Jinja2 templates (asyncio/trio/curio)
[muffin-session](https://github.com/klen/muffin-session) – Signed cookie-based HTTP sessions
[muffin-oauth](https://github.com/klen/muffin-oauth) – OAuth integration
[muffin-sentry](https://github.com/klen/muffin-sentry) – Sentry error tracking
[muffin-peewee](https://github.com/klen/muffin-peewee-aio) – Peewee ORM integration
[muffin-babel](https://github.com/klen/muffin-babel) – i18n support
[muffin-databases](https://github.com/klen/muffin-databases) – SQL database support
[muffin-mongo](https://github.com/klen/muffin-mongo) – MongoDB integration
[muffin-rest](https://github.com/klen/muffin-rest) – REST API utilities
[muffin-redis](https://github.com/klen/muffin-redis) – Redis integration
[muffin-admin](https://github.com/klen/muffin-admin) – Auto-generated admin UI
[muffin-prometheus](https://github.com/klen/muffin-prometheus) – Prometheus metrics exporter

See each repo for usage and installation instructions.

Benchmarks

Performance comparisons are available at: http://klen.github.io/py-frameworks-bench/

Bug tracker

Found a bug or have a feature request? Please open an issue at: https://github.com/klen/muffin/issues

Contributing

Contributions are welcome! Please see [CONTRIBUTING.md](https://github.com/klen/muffin/blob/develop/CONTRIBUTING.md) for guidelines.

License

Muffin is licensed under the MIT license.

Credits

Muffin > 0.40 (completely rewritten on ASGI)

Kirill Klenov

Muffin < 0.40 (based on AIOHTTP_)