# Mobile Simulator docs (section llms.txt)

> Scoped agent context for documentation and product facts on msim.app.

## Start here

- [Root llms.txt](https://msim.app/llms.txt)
- [Docs hub](https://msim.app/docs)
- [Developers](https://msim.app/developers)
- [OpenAPI](https://msim.app/openapi.json)
- [Homepage markdown](https://msim.app/index.md)
- [Pricing](https://msim.app/pricing.md)
- [Auth for agents](https://msim.app/auth.md)
- [Agent instructions](https://msim.app/agents.md)

## What this product is

Free Chrome extension for multi-device responsive testing. Not a hosted device cloud API.

## Install

https://chromewebstore.google.com/detail/mobile-simulator-extensio/peipdddkaeomnfdenmkddkapeemjomnb