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T3 Stack · Concept

Input validation

tRPC lets you define typed API procedures in TypeScript and call them from the frontend. It infers router types, so you get type checking and editor completion without generated API code.

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Syntax

createTRPCRouter({ procedureName: publicProcedure.input(schema).query(handler) })

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  • Next.js
  • NextAuth.js
  • Prisma
  • Tailwind CSS
  • Drizzle
  • Create T3 App

Source: tRPC • Create T3 App. Checked 2026-11-03.