A curated list of awesome ASGI servers, frameworks, apps, libraries, and other resources.

This list should help you keep yourself up to date with the most awesome ASGI projects and resources. You can watch releases on this repo to be notified about new entries. If you find anything missing, please contribute. ❣️

ASGI is a standard interface positioned as a spiritual successor to WSGI. It enables communication and interoperability across the whole Python async web stack: servers, applications, middleware, and individual components.

Born in 2016 to power the Django Channels project, ASGI and its ecosystem have been expanding ever since, boosted by the arrival of projects such as Starlette and Uvicorn in 2018.

Contents

• Application frameworks
• Authentication
• End-user applications
• GraphQL
• Monitoring
• Proxies
• Real-time web
• Resources
  • Reference
  • Talks
  • Experiments and examples
  • Tutorials
• Security
• Serialization
• Serverless
• Servers
• Testing

Frameworks for building ASGI web applications.

• Asgineer - A really thin ASGI web framework, which includes support for long polling, SSE and websockets.
• BlackSheep - BlackSheep is an asynchronous web framework to build event based web applications with Python. It is inspired by Flask, ASP.NET Core, and the work by Yury Selivanov.
• Channels - Asynchronous support for Django, and the original driving force behind the ASGI project. Supports HTTP and WebSockets with Django integration, and any protocol with ASGI-native code.
• Django - The web framework for perfectionists with deadlines. Has native ASGI support since version 3.0.
• Falcon - The minimalist REST and app backend framework for Python, with a focus on reliability, correctness, and performance at scale. Native ASGI support since version 3.0.
• FastAPI - A modern, high-performance web framework for building APIs with Python 3.6+ based on standard Python type hints. Powered by Starlette and Pydantic. Supports HTTP and WebSockets.
• Guillotina - Full-featured ASGI-compatible REST application framework, designed for high performance and horizontally scaling solutions.
• Litestar - A high-performance ASGI framework, which offers msgspec-based message parsing, Depdency-Injection, Authentication, OpenAPI docs, and more. Supports HTTP and Websockets. Supports asyncio and trio.
• Pyotr - A server framework, as well as a client library, for serving and consuming OpenAPI-based Web services. Based on Starlette and HTTPX.
• Quart - A Python ASGI web microframework whose API is a superset of the Flask API. Supports HTTP (incl. SSE and HTTP/2 server push) and WebSockets.
• Responder - A familiar HTTP Service Framework for Python, powered by Starlette.
• Sanic - Sanic is a Python 3.6+ web server and web framework that's written to go fast. It allows the usage of the async/await syntax added in Python 3.5, which makes your code non-blocking and speedy. Supports HTTP and WebSockets.
• Starlette - The little ASGI framework that shines. Starlette is also an ASGI toolkit -- its modular design and reusable components made it foundational in the ASGI ecosystem. Supports HTTP and WebSockets. Supports asyncio and trio.
• Tonberry - Tonberry is an ASGI framework that takes a class based approach to routing. Influenced by CherryPy but made compatible with asyncio and WebSockets.

Packages for adding authentication and managing users in ASGI web applications.

• asgi-auth-github - GitHub OAuth authentication for ASGI apps. Supports restricting to specific users or member of specific teams or organizations.
• SessionAuth - Authenticate using sessions and cookies. (Shipped with Piccolo API, and requires Piccolo ORM.)
• TokenAuth - Authenticate using tokens in request headers. (Shipped with Piccolo API, and requires Piccolo ORM.)

Real-world applications that run on ASGI.

• ASGIWebDAV - An asynchronous WebDAV server implementation. Support multi-provider, multi-account and permission control.
• Datasette - A tool for exploring and publishing data, including ASGI-compatible components and plugins.

Packages for building GraphQL APIs via ASGI.

• Ariadne - A schema first Python library for implementing GraphQL servers.
• Strawberry - A code first Python library for implementing GraphQL servers, inspired by dataclasses.
• tartiflette-asgi - ASGI support for the Tartiflette GraphQL engine.

Packages for monitoring ASGI web applications.

• asgi-correlation-id - Request/Correlation ID logging middleware
• New Relic ASGI - New Relic integration for ASGI applications. (Shipped with newrelic.)
• opentelemetry-python - ASGI middleware and helpers for collecting application metrics via the (currently alpha) OpenTelemetry standard. Supports HTTP and WebSocket.
• Scout APM Starlette - Scout APM integration with Starlette and Starlette-based frameworks. (Shipped with scout-apm.)
• Sentry ASGI - Sentry integration for ASGI frameworks. (Shipped with sentry-sdk.)
• timing-asgi - ASGI middleware to record and emit timing metrics.

Packages for use when running ASGI web applications behind proxies, or proxying other servers via ASGI applications.

• asgi-proxy-lib - An ASGI function for proxying to a backend over HTTP.
• asgiproxy – Tools for building HTTP and Websocket proxies for ASGI.
• ProxyHeadersMiddleware - Use X-Forwarded-Proto and X-Forwarded-For headers set by a known and trusted proxy to make client and scheme reference the connecting client (shipped with Uvicorn).

Packages for use when building real-time-capable ASGI web applications.

• python-socketio - WebSocket clients and servers using Socket.IO. Includes an ASGI application wrapper.

Content about ASGI itself: concepts, history, usage, etc.

Articles, blog posts and other publications about ASGI.

• 2019-08-11 - Introduction to ASGI: Emergence of an Async Python Web Ecosystem - Florimond Manca.
• 2019-03-20 - ASGI 3.0, Andrew Godwin.
• 2018-06-17 - Embracing ASGI with Quart; Introducing Hypercorn, Philip Jones.
• Undated - Hello ASGI, Tom Christie.

Reference documentation and implementation for ASGI.

• ASGI Documentation - Documentation site for the ASGI specification.
• asgiref - ASGI reference implementation, including function wrappers, server base classes, type hints, and a WSGI-to-ASGI adapter.

Talks about ASGI.

• 2023-06-05 - Inside your Web framework: Intro to the ASGI spec, middleware and apps, Adrian Garcia Badaracco, PyConUS 2023.
• 2019-06-15 - An introduction to ASGI, Asynchronous Server Gateway Interface, P G Jones, PyLondinium 2019.
• 2019-04-12 - Sketching out A Django redesign, Tom Christie, DjangoCon Europe.
• 2018-07-27 - Quart; an ASGI alternative to Flask, P G Jones, EuroPython 2018.
• 2018-05 - Taking Django Async, Andrew Godwin, PyCon.
• 2017-11 - Future Pythonic Web: ASGI & Daphne, Dmitry Nazarov, PiterPy.

Software that experiments with ASGI or otherwise provides "No maintenance intended" code.

• asgi-background - Background tasks for any ASGI framework.
• asgi-lifespan-middleware - ASGI middlewate to support ASGI lifespans using a simple async context manager interface.
• asgi-routing - A high performance router written in Rust for the ASGI ecosystem. Built on top of routrie and path-tree.
• nanoasgi - A tiny zero-dependency ASGI web framework.
• proxyx - Proof of concept for a lightweight HTTP/1.1 proxy service built with ASGI and HTTPX.
• py-frameworks-bench - A benchmark for (mostly-ASGI) Python async frameworks.

Tutorials about working with ASGI applications and components.

• 2019-08-26 - Quick and dirty mock service with Starlette, Matt Layman.
• 2018-10-15 - Working with ASGI and HTTP, Tom Christie.
• 2018-06-22 - Writing an ASGI web framework, Yoong Kang Lim.

Packages and components for managing the security of ASGI web applications.

• asgi-csrf - ASGI middleware for protecting against CSRF attacks.
• asgi-ratelimit - A customizable rate limiting ASGI middleware, with regex path matching support.
• CORSMiddleware - Allow cross-origin requests from browsers. (Shipped with Starlette.)
• CSPMiddleware - Tell browsers to only run Javascript from the same origin. (Shipped with Piccolo API.)
• CSRFMiddleware - Protect against CSRF attacks when using cookies for authentication. (Shipped with Piccolo API.)
• HTTPSRedirectMiddleware - Redirect HTTP/WS traffic to HTTPS/WSS. (Shipped with Starlette.)
• RateLimitingMiddleware - Protect sensitive endpoints from brute force attacks. (Shipped with Piccolo API.)
• TrustedHostMiddleware - Guard against host header attacks by validating the Host header of requests. (Shipped with Starlette.)

Packages and components for converting the format of data in and out of ASGI web applications.

• brotli-asgi - Response content compression using Brotli.
• GZipMiddleware - Response content compression using GZip. (Shipped with Starlette.)
• msgpack-asgi - Drop-in MessagePack support for ASGI apps and frameworks.

Packages for building serverless web applications with ASGI.

• Mangum - AWS Lambda & API Gateway support for ASGI.

Web servers for ASGI applications.

• Daphne - An HTTP, HTTP2 and WebSocket protocol server for ASGI, developed to power Django Channels.
• Hypercorn - An ASGI server based on the sans-io hyper, h11, h2, and wsproto libraries. Supports HTTP/1, HTTP/2, WebSockets, ASGI 2.0 and ASGI 3.0. Compatible with asyncio, uvloop and trio worker types.
• NGINX Unit - A universal web app server that supports ASGI.
• Uvicorn - A fast ASGI server based on uvloop and httptools. Supports HTTP/1 and WebSockets.

Packages for testing ASGI applications.

• asgi-lifespan - Programmatic startup/shutdown of ASGI apps. Allows testing an ASGI app without having to spin up a server.
• async-asgi-testclient - A framework-agnostic library for testing ASGI web applications.
• HTTPX - Next generation HTTP client, including async support and ability to call ASGI apps directly.