Fastify Has a Free API — Here's How to Build High-Performance REST APIs

Fastify is one of the fastest web frameworks for Node.js. It provides schema-based validation, plugin architecture, and TypeScript support — processing 30K+ requests/second. Installation npm install fastify Basic Server import Fastify from " fastify " ; const app = Fastify ({ logger : true }); app . get ( " / " , async () => { return { message : " Hello from Fastify! " }; }); app . get ( " /users/:id " , async ( request ) => { const { id } = request . params ; return { id , name : " User " + id }; }); await app . listen ({ port : 3000 }); Schema Validation const postSchema = { body : { type : " object " , required : [ " title " , " content " ], properties : { title : { type : " string " , minLength : 1 , maxLength : 200 }, content : { type : " string " }, tags : { type : " array " , items : { type : " string " } } } }, response : { 201 : { type : " object " , properties : { id : { type : " number " }, title : { type : " string " }, createdAt : { type : " string " } } } } }; app . post