Server Routes

Server routes are API endpoints defined alongside app routes in the src/routes directory. They use the server property on createFileRoute and handle raw HTTP requests.

Use server routes when callers need an HTTP contract. For data used only by the Start application, prefer a server function and call it directly from the loader. A route loader runs during SSR and client navigation, so fetch('/api/...') is not a portable loader pattern.

Basic Server Route

// src/routes/api/hello.ts
import { createFileRoute } from '@tanstack/react-router'