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The most intuitive desktop API client. Organize and execute REST, GraphQL, WebSockets, Server Sent Events, and gRPC 🦬

The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.

Simple to use, blazing fast and thoroughly tested WebSocket client and server for Node.js

MockServer is an HTTP(S) mock server and proxy for testing that lets you mock APIs, inspect and modify live traffic, and inject failures. It supports HTTP/1.1, HTTP/2, gRPC, WebSockets, TCP and more on a single port, with additional support for HTTP/3, message brokers, and AI/LLM APIs.

Turn any program that uses STDIN/STDOUT into a WebSocket server. Like inetd, but for WebSockets.

🏓 tRPC Next.js WebSocket Starter

Simple, small, C++ embeddable webserver with WebSockets support

iodine - HTTP / WebSockets Server for Ruby with Pub/Sub support

Real-time Go struct to JS object synchronisation over SSE and WebSockets

VerneMQ Docker image - Starts the VerneMQ MQTT broker and listens on 1883 and 8080 (for websockets).

Command-line client for WebSockets, like netcat (or curl) for ws:// with advanced socat-like functions

Node.js & JavaScript SDK for Binance REST APIs & WebSockets, with TypeScript & browser support, integration tests, beautification & more.

Async State Management without the Management. REST, GraphQL, SSE, Websockets

A very fast Python asyncio http and websockets client

C/C++ WebRTC network library featuring Data Channels, Media Transport, and WebSockets

Broadcast, Presence, and Postgres Changes via WebSockets

A rate limiting module for NestJS to work with Fastify, Express, GQL, Websockets, and RPC 🧭

C++ WebRTC Data Channels and WebSockets for WebAssembly in browsers

Asynchronous C network library with HTTP server, WebSockets, reverse proxy, HTTP/2 gRPC client, TLS and event loop.

Simple + Robust HTTP/S server with websockets for ESP32 based on ESP-IDF http server.

JTs Hud Manager (formerly OpenHud) uses the CS2 GSI and a node server with websockets to send data to a react client.

Unified Polymarket v2 APIs with Pydantic data validation - Clob, Gamma, Data, Web3, Websockets, GraphQL clients.

🚀 A real-time monitoring dashboard for Claude Code & Codex, built with SQLite3, Node.js, Express, React, Vite, TailwindCSS, & WebSockets. It tracks sessions, agent activity, tool usage, and subagent orchestration, providing live analytics, a Kanban status board, status notifications, a cute buddy, & an interactive web UI/MacOS/Windows native app.

Real-time monitoring & analytics platform for Pump.fun tokens. Track launches, analyze trends, and get instant alerts — powered by WebSockets. Built with HTML, CSS & JavaScript.

Localhost, anywhere. One command gives your dev server a public HTTPS URL, with WebSockets and hot reload. Free, no account, runs on Cloudflare Workers.