Uvicorn: Asynchronous ASGI Web Server for Python

RepositoryKludex/uvicornTool

Uvicorn is a lightweight Python web server implementing the ASGI specification with support for HTTP/1.1 and WebSockets.

Key points

  1. Implements the ASGI specification as an asynchronous interface between servers and Python frameworks.
  2. Provides native support for HTTP/1.1 and WebSocket connections.
  3. Offers a pure Python baseline installation alongside standard extras leveraging Cython-based components like uvloop and httptools.
  4. Features development conveniences including automatic reloading via watchfiles and environment handling with python-dotenv.

Why it matters

Traditional WSGI servers rely on synchronous request-response callables, which struggle with long-lived connections such as WebSockets. Uvicorn resolves this limitation by standardising modern async tooling across Python frameworks.

Analysis

Uvicorn targets backend developers deploying asynchronous Python web services and APIs. Built around asyncio, uvloop, httptools, and websockets, it delivers low-level concurrency. With more than 10,900 GitHub stars, over 1,000 forks, a BSD-3-Clause licence, and steady updates, it represents an exceptionally mature core component of modern Python web infrastructure.

Mentioned links

Found in

Summary generated by AI (Gemini 3.8 Flash, 27 September 2026). It may contain errors – the original source is authoritative.

Related entries

Similar in content, found by the AI search.

  • Link:uvicorn.dev

    Uvicorn: ASGI Web Server for Python

    The official documentation for Uvicorn introduces the asynchronous Python web server, which implements the ASGI specification and supports HTTP/1.1 and WebSockets.

    Web development· Tool

  • Repository:emmett-framework/granian

    Granian: A Rust HTTP Server for Python Applications

    Granian is a high-performance HTTP server for Python applications built in Rust using Hyper and Tokio. It supports ASGI, WSGI, and RSGI interfaces, aiming to replace complex dependency stacks like Gunicorn plus Uvicorn with a single, fast binary package.

    5.6kstarsRust

    Web development· Tool

  • Link:Michael Kennedy

    Running Python on Rust: Granian as a Production App Server

    In Chapter 6 of his book 'Python in Production', Michael Kennedy explains the deployment of Granian as an HTTP server for Python applications. Built with Rust, Granian replaces legacy tools like uWSGI, excelling in benchmarks through consistent low tail latency and dual support for WSGI and ASGI.

    Web development· Resource

  • Link:Tiangolo

    FastAPI: Running a Server Manually

    FastAPI's official documentation outlines the manual execution of server programs and ASGI servers.

    Web development· Resource

  • Link:libraries.io

    opencode-py 0.8.0: Python SDK for the Opencode AI Coding Agent

    Version 0.8.0 of opencode-py provides a dedicated Python SDK for Opencode, an open-source AI coding agent. It automates binary downloads, supports sync and async workflows, and features agentic tool execution alongside typed SSE event handling.

    AI & LLMs· Tool

  • Repository:xdevplatform/xmcp

    xmcp: FastMCP Server for the X API

    xmcp is a Python-based Model Context Protocol (MCP) server that exposes the X API OpenAPI specification as callable tools using FastMCP, allowing AI agents to interact with X endpoints.

    853starsPython

    AI & LLMs· Tool

Back to the knowledge base

Let's talk about your project

Get in touch

Locations

  • Mattersburg
    Johann Nepomuk Bergerstraße 7/2/14
    7210 Mattersburg, Austria
  • Vienna
    Ungargasse 64-66/3/404
    1030 Wien, Austria

Parts of this content were created with the assistance of AI.