Working examples
Small routes that expose one full-stack idea at a time.
Example 02 / Server functions
A server boundary you can call like a function.
This snapshot reads Node-only runtime data inside createServerFn(), then returns it to the route loader through a typed contract.
Live server response
- Request ID
- b790d22a
- Runtime
- Node.js 22.19.0
- Executed at
- 2026-08-03T08:10:24.506Z
- ✓ Typed RPC
- ✓ Server-only APIs
- ✓ Route invalidation
No endpoint ceremony
TanStack Start generates the transport layer while the function remains directly callable from loaders and components.