This is a small proof-of-concept showing how to get tRPC working with the Next 13 app directory, all in TypeScript. All of the code is drawn from the tRPC tutorial, here, and here. Some attempt has been made to minimize the example code.
Note this code contains an example of performing an RPC from a Client Component, and also from a Server Component. tRPC calls from Server Components in particular are an area of active investigation.
First, run the development server:
npm run dev
# or
yarn dev
# or
pnpm devOpen http://localhost:3000/clientcomponent with your browser to see the result with a Client Component.
Visit http://localhost:3000/servercomponent to see the result with a Server Component instead.
In both cases, a simple page displays the result of a tRPC call. You can edit src/app/MyRpcClientComponent.tsx or src/app/servercomponent/page.tsx to change the query being made, or src/trpc-server.ts to change the "API" and see that the code fails to compile.
npx create-next-app@latest trpc-next
cd trpc-next/
npm install @trpc/client @trpc/react-query @tanstack/react-query @trpc/server zod
This should be the basics needed if you want to incorporate this into an existing project.