# Semrush Developer

> Documentation and resources for developers working with Semrush APIs, the Intergalactic Design System, and the Semrush App Center.

Choose the documentation area that matches your task. If that area provides its own `llms.txt` index, use it for detailed navigation.

## Semrush API

- [Semrush API documentation](https://developer.semrush.com/api/): Guides, API references, tutorials, and other resources for using Semrush APIs.
- [Semrush API documentation index](https://developer.semrush.com/api/llms.txt): Use this index to navigate Semrush API documentation and select the appropriate API version for your task.

## Intergalactic Design System

- [Intergalactic Design System documentation](https://developer.semrush.com/intergalactic/): UI components, design guidelines, UX patterns, and other resources for building Semrush interfaces.

## Semrush App Center

- [App Center developer documentation](https://www.semrush.com/apps/docs/): Guides, requirements, API references, and other resources for building and publishing Semrush App Center apps.