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T3 Stack · Concept

Data transformer

tRPC lets you define TypeScript API procedures on the server and call them from the frontend with inferred types. It avoids API code generation and keeps client calls type-safe.

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Syntax

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

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

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  • createTRPCContext
  • createInnerTRPCContext
  • createTRPCRouter
  • publicProcedure
  • middleware
  • superjson
  • httpBatchLink
  • loggerLink

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