Scalable real-time messaging server in a language-agnostic way. Self-hosted alternative to Pubnub, Pusher, Ably. Set up once and forever.

Realtime server for reliable two-way communication to power-up any backend

Real-time messaging library for Go. The simplest way to add feature-rich and scalable WebSocket support to your application. The core of Centrifugo server.

A secure, efficient TCP/UDP tunneling solution that delivers fast, reliable access across network restrictions using pre-established TLS/TCP connections.

Server Sent Events server and client for Golang

Fully featured, spec-compliant HTML5 server-sent events library

A lightweight Model Context Protocol (MCP) server that enables AI assistants like Claude to retrieve and interpret real-time weather data. What makes it popular:

🚀A next-generation HTTP client for Golang, Support for http1, http2, http3, websocket, sse, utls, uquic

KaGo

Server-Sent Events for Go

Making it easier to push pubsub events directly to the browser.

🏄 High-performance Server-Sent Events endpoint for Go

HTML5 Server-Sent-Events for Go

Server-Sent Events for Go. A tiny, dependency-free, spec-compliant library compatible with the HTTP stdlib.

Pulsar Beam is a streaming service via HTTP built on Apache Pulsar.

One connection for all your MCP servers.

Open Source Realtime Tracking System

c-lightning RPC over HTTP with fine-grained permissions, SSE and spark-wallet support

SSE over QUIC protocol

➿ Watch filesystem changes recursively