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T3 Stack · Concept

OpenAPI generation

tRPC lets you build type-safe APIs with TypeScript. The frontend can call backend procedures with inferred types, type checking, and auto-completion, without generated API code or runtime bloat.

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Syntax

createTRPCRouter({ procedureName: publicProcedure.input(schema).query(({ ctx, input }) => { ... }) })

In-depth API docs are only for subscribers: parameters, examples, common mistakes and interview practice.

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  • TypeScript
  • API router
  • procedure
  • publicProcedure
  • Prisma
  • Next.js

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