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

# Backapp documentation

> Connect your mobile app to Backapp’s hosted API.

Backapp offers a hosted API for mobile apps. The first guide covers device registration and image effects. Your app selects an effect, uploads an image, and displays the result returned by Backapp.

* [Apply an image effect](https://docs.backapp.dev/quickstart.md)
* [Set up authentication](https://docs.backapp.dev/authentication.md)
* [Integrate with a coding agent](https://docs.backapp.dev/build-with-ai.md)


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