Bun Has a Free API — The All-in-One JavaScript Runtime That Replaces Node

Bun is a JavaScript runtime, bundler, test runner, and package manager — all in one binary. It's 3-10x faster than Node.js for most operations and drops in as a replacement. Why Bun? 3x faster npm install (no node_modules sprawl with bun install ) Built-in bundler — replaces webpack/esbuild Built-in test runner — replaces Jest/Vitest Native TypeScript — no tsc or ts-node needed Node.js compatible — runs most npm packages Quick Start # Install curl -fsSL https://bun.sh/install | bash # Create project bun init # Run TypeScript directly bun run index.ts # Install packages (3x faster than npm) bun install express HTTP Server (Built-in) // server.ts Bun . serve ({ port : 3000 , fetch ( req ) { const url = new URL ( req . url ); if ( url . pathname === ' /api/hello ' ) { return Response . json ({ message : ' Hello from Bun! ' }); } if ( url . pathname === ' /api/users ' && req . method === ' POST ' ) { const body = await req . json (); return Response . json ({ created : body }, { status : 2