pysignalr
Modern, reliable and async-ready client for SignalR protocol
Decision gist · record as of 2026-08-14
Yes. The package is actively maintained, production-stable, has no known vulnerabilities, and offers low installation friction. It fills a clear need for Python developers integrating with SignalR servers. The permissive MIT license and broad Python version support (3.10–3.14) make it a straightforward choice for real-time communication scenarios.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.10 or later; target SignalR server must be accessible and support the SignalR protocol.
- Low friction installation as a pure-Python wheel.
- Actively maintained with recent commits and production-stable status.
License · maintenance · safety
permissive license (permissive) — Licensed under MIT (permissive), allowing use in both open-source and proprietary projects with minimal restrictions.
last release 2026-04-17 (119 days) · last repo commit 2026-04-17 · 32 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 639,222 downloads/mo, #5,615 on PyPI
Alternatives
Verify before relying
pip install pysignalr
from pysignalr.client import SignalRClient
import asyncio
async def on_message(msg):
print(f'Received: {msg}')
async def main():
client = SignalRClient('wss://example.com/hub')
client.on('event_name', on_message)
await client.run()
asyncio.run(main())- Whether the library supports SignalR protocol versions beyond the default (e.g., protocol version negotiation details)
- Performance characteristics under high message volume or with large payloads
- Compatibility with specific ASP.NET Core SignalR server versions
What it is and what it does
pysignalr is an async Python client for the SignalR protocol, a real-time communication framework used primarily by ASP.NET Core applications. It manages WebSocket connections to SignalR servers, handles message encoding/decoding via JSON or MessagePack, and provides event-driven callbacks for connection lifecycle and incoming messages. The library supports both fire-and-forget method invocations and request-reply patterns, as well as server-to-client and client-to-server streaming.
Typical use involves instantiating a SignalRClient with a server URL, registering event handlers via `.on()` methods, and running the client's connection loop. The library handles reconnection with exponential backoff, token-based authentication, custom headers, and configurable timeouts. It depends on aiohttp for HTTP operations, websockets for WebSocket transport, msgpack and orjson for message serialization.
Use it for
- Subscribe to real-time blockchain events from a Tezos API (as shown in the documentation example with TzKT).
- Build a live dashboard that receives server-pushed updates from an ASP.NET Core SignalR hub.
- Implement client-side event handlers that respond to server notifications without polling.
- Stream data bidirectionally between a Python application and a SignalR-enabled backend service.
- Authenticate with a SignalR server using token-based access via a custom token factory function.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
The package is actively maintained, production-stable, has no known vulnerabilities, and offers low installation friction. It fills a clear need for Python developers integrating with SignalR servers. The permissive MIT license and broad Python version support (3.10–3.14) make it a straightforward choice for real-time communication scenarios.
Install
pysignalr on PyPI
Before you install
Low friction installation as a pure-Python wheel. Actively maintained with recent commits and production-stable status. Requires Python 3.10 or later.
Requires Python 3.10 or later; target SignalR server must be accessible and support the SignalR protocol.
License in practice
Licensed under MIT (permissive), allowing use in both open-source and proprietary projects with minimal restrictions.
Quickstart
pip install pysignalr
from pysignalr.client import SignalRClient
import asyncio
async def on_message(msg):
print(f'Received: {msg}')
async def main():
client = SignalRClient('wss://example.com/hub')
client.on('event_name', on_message)
await client.run()
asyncio.run(main())Verify before relying
- Whether the library supports SignalR protocol versions beyond the default (e.g., protocol version negotiation details)
- Performance characteristics under high message volume or with large payloads
- Compatibility with specific ASP.NET Core SignalR server versions
Package facts
| License | permissive license permissive |
| Python support | Supports the current Python release <4,>=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 4 packagesaiohttpmsgpackorjsonwebsockets |
| Maintenance | Actively maintained 119 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 639,222 / month, #5,615 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableEnvironment :: ConsoleIntended Audience :: DevelopersLicense :: OSI Approved :: MIT LicenseOperating System :: OS IndependentProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Programming Language :: Python :: Implementation :: CPythonTopic :: Software Development :: Libraries :: Application FrameworksTyping :: Typed |
Evidence: pysignalr-1.3.2-py3-none-any.whl
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See also signalrcore · websocket-client · azure-mgmt-signalr · simple-websocket · wslink · amqp · pyqwest · websockets · ws4py · websocket