> ## Documentation Index
> Fetch the complete documentation index at: https://devkit4ai.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Use Case: API-First App

> Build headless services powered by the Dev Kit for AI backend.

The Cloud API can power experiences beyond the bundled Starter Kit UI:

* Authenticate service clients with developer keys or project keys depending on scope.
* Consume event-sourced read models through the REST endpoints while emitting commands for write operations.
* Layer your own presentation tier (web, mobile, CLI) knowing the backend contracts match the specifications in this documentation.