start-core/server-routes

Server-side API routes in TanStack Start are created using the createFileRoute function to define file-based endpoints. This approach centralizes server logic alongside UI routes, exposing GET, POST, PUT, and DELETE handlers under a single unified routing pattern.

Server route context provides access to request data, URL params, and route-specific context within TanStack Router handlers. This mechanism enables robust per-handler middleware and data processing by passing contextual information directly into your API logic.

Yes, per-handler middleware can be applied to file-based server routes in TanStack Start. This allows you to intercept and process requests for specific handlers, managing data handling and access control before the main GET, POST, PUT, or DELETE logic executes.

The best way to parse request bodies and format responses in a TanStack Start backend is by using the standard helpers provided within the createFileRoute server handlers. These helpers ensure consistent body parsing and uniform response formatting across all API endpoints.

Yes, TanStack Start enforces file-based route naming conventions for API server routes. This requires defining endpoints within the route files, ensuring the server paths match the UI structure and eliminating mismatches between frontend and backend logic.