trio-websocket

WebSocket library for Trio

trio-websocket Permissive license AGING ★ 80 v0.12.2 released 2025-02-25

Install

trio-websocket on PyPI

pip

pip install trio-websocket

uv

uv add trio-websocket

poetry

poetry add trio-websocket

Package facts

License	not declared (permissive)
Python support	supports the current Python release (>=3.8)
Install friction	low — pure-Python wheel
Runtime dependencies	4 — outcome, trio, wsproto, exceptiongroup
Maintenance	aging — 534 days since the last release
Last repo commit	2025-10-21
First released	2018-09-07
Popularity	one of the top 1,000 most-downloaded packages on PyPI (30-day window, as of 2026-08-13)
Known vulnerabilities	none known (OSV.dev, checked 2026-08-13)

Evidence: trio_websocket-0.12.2-py3-none-any.whl

Keywords: websocket, client, server, trio

Development Status :: 3 - AlphaIntended Audience :: DevelopersLicense :: OSI Approved :: MIT LicenseProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.8Programming Language :: Python :: 3.9Programming Language :: Python :: Implementation :: CPythonProgramming Language :: Python :: Implementation :: PyPyTopic :: Software Development :: LibrariesTyping :: Typed

About trio-websocket

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

Trio WebSocket

This library implements both server and client aspects of the the WebSocket protocol, striving for safety, correctness, and ergonomics. It is based on the wsproto project, which is a Sans-IO state machine that implements the majority of the WebSocket protocol, including framing, codecs, and events. This library handles I/O using the Trio framework. This library passes the Autobahn Test Suite.

This README contains a brief introduction to the project. Full documentation is available here.

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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

Implements WebSocket client and server using the Trio async framework, built on wsproto for protocol handling and passing the Autobahn Test Suite.

Low install friction with a pure-Python wheel and four straightforward runtime dependencies. However, the project is on life-support maintenance with the last release 534 days ago, though the repository remains active and not archived.

Licensed under the MIT License (permissive), allowing commercial and private use with minimal restrictions.

Usage

pip install trio-websocket

import trio
from trio_websocket import open_websocket_url

async def main():
    async with open_websocket_url('wss://echo.websocket.org') as ws:
        await ws.send_message('hello')
        msg = await ws.get_message()
        print(msg)

trio.run(main)

Requires Python 3.8 or greater; Trio framework must be installed as a runtime dependency.

Verdict: A solid, well-tested WebSocket implementation for Trio with no known vulnerabilities and permissive licensing. The aging maintenance status and 534-day gap since last release warrant caution for new projects; consider it stable for existing deployments but evaluate alternatives like quart-trio if you need active development support.

Needs verification

Whether the 534-day release gap reflects true maintenance inactivity or intentional stability; last commit date is recent (2025-10-21) but may not indicate active feature work.
Performance comparison with alternatives mentioned (quart-trio) to inform selection for new projects.

websocket trio asyncwebsocket client serverasync websocket librarytrio websocket protocolreal-time communication triowebsocket rfc6455async i/o websocket