tRPC Has a Free Framework for Building End-to-End Type-Safe APIs in TypeScript

tRPC lets you build fully type-safe APIs without schemas or code generation. Define a function on the server — call it on the client with full autocompletion.

What You Get for Free

• End-to-end type safety — no codegen needed
• Auto-completion — IDE knows all your API routes
• Subscriptions — real-time with WebSocket
• Batching — automatic request batching
• Framework agnostic — Next.js, Express, Fastify

Server

import { initTRPC } from '@trpc/server';
import { z } from 'zod';
const t = initTRPC.create();

const appRouter = t.router({
  getUser: t.procedure
    .input(z.object({ id: z.string() }))
    .query(({ input }) => ({ id: input.id, name: 'Alice' })),
});

Client

const user = await trpc.getUser.query({ id: '1' });
// user is fully typed: { id: string, name: string }

tRPC vs REST vs GraphQL

Feature	tRPC	REST	GraphQL
Type safety	Full	Manual	Codegen
Boilerplate	Minimal	High	Medium

---

Need TypeScript API help? Check my work on GitHub or email [e-mail] for consulting.