# aspnet/SignalR

[Archived] Incredibly simple real-time web for ASP.NET Core. Project moved to https://github.com/aspnet/AspNetCore

Repository: https://github.com/aspnet/SignalR
Canonical: https://ross.abutalabs.com/products/aspnet-signalr
Language: C#
License: Apache-2.0
License Family: permissive
Topics: aspnet-product
Archived: true
Last push: 2018-12-01T07:02:42+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3607, "days_push": 2832, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2363, forks 446 (observed 2026-08-28T04:06:41.018387+00:00)

## What it is
ASP.NET Core SignalR is a library that makes it simple to add real-time web functionality to ASP.NET Core applications, letting server-side code push content to connected clients instantly. This repository is archived; development has moved into the aspnet/AspNetCore repository.

## Use cases
- push live notifications from server to browser clients
- build real-time chat applications in ASP.NET Core
- stream live dashboard or telemetry updates to connected users
- synchronize state across multiple clients in real time
- add live collaboration features to a web app
- broadcast messages to all connected clients over WebSockets

## When to choose
- you are building real-time features in ASP.NET Core applications
- you need server-to-client push with automatic transport fallback (WebSockets, SSE, long polling)
- you want a managed abstraction over raw WebSocket handling in .NET

## When to avoid
- you are starting a new project - use the SignalR code now maintained in aspnet/AspNetCore instead
- you need the legacy .NET Framework (System.Web/Katana) version - use the SignalR/SignalR repository
- your app does not require real-time server push

## Facets
- artifact type: library
- maturity: abandoned
- function: websocket, rpc, web-framework, middleware
- domain: web-development, backend, apis
- platform: cross-platform
- tags: real-time-web, aspnet-core, server-push, archived, dotnet, signalr, real-time, web-server, nodejs

## Member repositories
- aspnet/SignalR (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:41.018387+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:36:02.543410+00:00, confidence not recorded.
  - readme: https://github.com/aspnet/SignalR (fetched 2026-08-28T04:06:41.018387+00:00, sha dffefc4789e1)
- Data as of 2026-08-30T08:39:29.467469+00:00.