trpc

tRPC enables you to build fully type-safe APIs without code generation or schema files. It provides automatic type inference from server to client, making TypeScript work seamlessly across your full stack. Official Documentation: https://trpc.io ---

tRPC is a TypeScript-first framework for building type-safe APIs using Remote Procedure Calls (RPC). Unlike REST or GraphQL, tRPC eliminates the need for: • ❌ Manual type definitions • ❌ Code generation • ❌ Schema synchronization • ❌ API contracts Instead, you get: • ✅ End-to-end type safety: Types flow automatically from server to client • ✅ Autocomplete everywhere: Full IntelliSense for all your API calls • ✅ Instant feedback: TypeScript errors when your API changes • ✅ Zero runtime overhead: Type information is stripped at build time ---

Initialize tRPC exactly once per application to avoid conflicts: `typescript // server/trpc.ts import { initTRPC } from '@trpc/server'; // Initialize tRPC const t = initTRPC.create(); // Export router and procedure builders export const router = t.router; export const publicProcedure = t.procedure; ` ✅ Good: Single initialization per app `typescript // server/trpc.ts const t = initTRPC.create(); export const router = t.router; export const publicProcedure = t.procedure; ` ❌ Bad: Multiple tRPC instances `typescript // ❌ Don't do this! const t1 = initTRPC.create(); const t2 = initTRPC.create(); // Causes conflicts `

Define routers with procedures (API endpoints): `typescript // server/routers/_app.ts import { router, publicProcedure } from '../trpc'; import { z } from 'zod'; export const appRouter = router({ // Query: fetch data greeting: publicProcedure .input(z.object({ name: z.string() })) .query(({ input }) => { return { message: Hello ${input.name}! }; }), // Mutation: modify data createUser: publicProcedure .input(z.object({ email: z.string().email(), name: z.string(), })) .mutation(async ({ input }) => { // Create user in database return { id: '1', ...input }; }), }); // Export type for client export type AppRouter = typeof appRouter; `