tRPC

Move Fast & Break Nothing. End-to-end typesafe APIs made easy.

tRPC

Move Fast & Break Nothing. End-to-end typesafe APIs made easy.

11/15/2025

Hono tRPC Server body issue

I have been trying to get Cloudflare Workers, Hono and tRPC working for tens of hours now. I am using the @hono/trpc-server package which gives me middleware for trpc to run with hono. They even have an example with cloudflare workers and a d1 database, so I know it is possible to do what I am trying to do. The problem I am having is that tRPC is not reading the body properly, or at all. Take this function as an example: ```ts...

Brainlaq

11/12/2025

transfer class instances

The AI SDK uses the Chat class as the abstraction that one is supposed to share: https://ai-sdk.dev/cookbook/next/use-shared-chat-context the useChat hook needs the same reference in order to not rerender: https://github.com/vercel/ai/blob/e15b5458f1aaced8ea854823044ea3d125dcaac8/packages/react/src/use-chat.ts#L67 My current soultion is to wrap trpc with a "normal" useQuery...

oimmi

11/11/2025

Next.js/tRPC RootLayout Caching Error

I'm hitting a specific rendering/caching issue in my Next.js (App Router) RootLayout when trying to fetch data via tRPC. 💻 Code Snippet (app/layout.tsx) I am trying to fetch the list of categories server-side within the layout:...

Jack Delamou

11/6/2025

Nextjs SSR

Hey everyone! I’m pretty new to this way of building APIs. Is it possible to use tRPC to create type-safe APIs with Next.js (using React Query + prefetch) while having a separate Node.js backend inside the same monorepo?

Ali Samadi

11/2/2025

authenticatedProcedure

Is it true that for every requests, it is going to call getSession()? If yes, what is a good workaround or this is how everyone is doing?...

Ali Samadi

11/2/2025

trpcClient

Is this way recommended or stable that we can save the trpcClient outside of the provider and access it easily? Like image 2

Lopais

10/22/2025

Type stable "combine" function for "useQueries"

Hey all, im trying to use a https://tanstack.com/query/latest/docs/framework/react/reference/useQueries#combine function to combine the results from multiple queries together. As the documentation says, the combine function should be referentially stable. Im trying to get this typed properly, but getting the proper type for the "result" parameter of the combine function is a little crazy the way I have it working now, see example below....

larryx01

10/21/2025

TRPC type aliasing

I have these two interfaces set up. One manually defined with TS interface and one using the output of a Zod schema ```export interface TestManualInterface { first_name: string; }...

v28

10/18/2025

zustand empty on inital render

Hello, I am currently using nextjs, trpc and zustand. I'm running into a problem where my zustand state is undefined on reacts inital render of the page. - I use trpc's prefetch function is a layout.tsx file to fetch data on the server, the data here is used on all routes within my /dashboard directory (this data is mainly for my dashboard sidebar...

James Hopgood

10/17/2025

Zod v4 Issues with inferred typeof appRouter

Here is the full error message: src/routers/_app.ts:13:14 - error TS2742: The inferred type of 'appRouter' cannot be named without a reference to '../../node_modules/zod/v4/core/util.cjs'. This is likely not portable. A type annotation is necessary. - I am in a turborepo with a separate frontend and backend apps. ...

Aleksander

10/16/2025

createTRPCOptionsProxy needs a queryClient?

Trying to understand why createTRPCOptionsProxy needs a queryClientgiven that it's then used inside of useQuery, which in turn will get the client from useQueryClient? What would happen if the two queryClients don't match?

dev

10/16/2025

what's the correct way of reporting unhandled errors to Datadog (or similar services)?

I tried multiple things to make sure that Datadog sees the actual error being thrown, but no matter what I did, the error is always the same (screenshot attached). This is my current logger (it was much simpler before, but I tried to recursively find the cause error with no luck). ```ts...

⚙

10/14/2025

How do I add a Websocket server to a normal tRPC HTTP server for realtime events?

I have a project that contains the following: - Express API using TRPC - CapacitorJS mobile app using SolidJS - PWA app using SolidJS ...

larryx01

10/10/2025

Is it possible to use trpc client in a shared monorepo package?

My pnpm monorepo setup: - API (express) - packages/shared (shared code) - web (nextjs) - app (react native)...

sebastienbarre

10/9/2025

Struggling to refactor into sub-routers

Howdy. I'm struggling to refactor the creation of a sub-router into a function that is independent of the server instance. ```typescript import { publicProcedure, router } from "./trpc.ts"; import { actorRepo } from "../../../Domain/Actor/Persistence/Drizzle/SQLite/ActorDrizzleSQLiteRepository.ts";...

ivan

10/8/2025

How to map internal errors to TRPCError types?

Hi, my application is throwing it's own set of custom Errors. Unfortunatelly tRPC always catch this errors and represent them as UNEXPECTED_SERVER_ERROR type. I tried following:...

functiondj

10/6/2025

Keep subscription `.data` after stopping (Tanstack Query)

It looks like mySubscription.data is undefined after the subscription stops from the server side (returning from generator function). Can I keep this data without introducing my own useState and leverage Tanstack Query instead? I'm using the old React Query integration because there's no documentation for the new integration for subscriptions (i.e. useSubscription(trpc.mySub.useOptions()) )....

Mugetsu

10/1/2025

How to compress procedure response

I have one trpc procedure which has 40 mb response. I would like to compress this. How can I compress one procedure call in trpc. Or even better have compression for all trpc procedures above some threshold. Is it possible or I have to create separate api endpoint out of trpc context. I’m using nextjs with custom express server....

lou

9/29/2025

Next js Pages Router, TRPC

Has anyone succesfully set up next js pages router and trpc?

John Wu

9/28/2025

A cleaner web experience for this forum

Hey! I saw this forum uses AnswerOverflow to sync Discord threads to the web. I’m building Paladin, a smoother, cleaner alternative that makes Discord forums easier to browse on the web. It’s free to use and can run alongside AnswerOverflow, so you don’t have to switch anything to try it out. If it’s helpful, I can spin up a version of Paladin on your forum so you can see how it looks for your community. Is there anything about your current setup you’d like improved? I’d love to see if Paladin can help. 😀 Example Paladin preview attached...