MSIM - Mobile Simulator
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Developers

Developer portal

Mobile Simulator is a free Chrome extension, not a multi-tenant cloud API. This portal documents the public documentation surface agents and integrators can read without authentication, plus how end users install the product.

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Quickstart

  1. Read /llms.txt for product intent and when-to-use guidance.
  2. Fetch /openapi.json for the public docs endpoint map.
  3. Send users to the Chrome Web Store listing to install. No MSIM API key is issued or required.

Authentication

Public docs endpoints are open. There is no OAuth client registration for product features because the runtime is a local browser extension. See auth.md for the full agent walkthrough.

Public endpoints

  • GET /llms.txt — agent product index
  • GET /openapi.json — OpenAPI 3.1 for docs surface
  • GET /index.md, /pricing.md, /auth.md, /agents.md
  • GET /?mode=agent or Accept: text/markdown on /
  • GET /.well-known/ai-catalog.json
  • GET /.well-known/api-catalog
  • GET /.well-known/agent-card.json
  • GET /.well-known/agent-skills/index.json

Example:

curl -sL https://msim.app/llms.txt

curl -sL -H 'Accept: text/markdown' https://msim.app/

Sandbox

There is no hosted API sandbox because there is no hosted product API. The “sandbox” is installing the free extension and opening any public website inside Chrome.

Support

Questions: support@msim.app, contact page, or Chrome Web Store support on the listing.

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