The Agent Browser
Chapters
Your agent writes a web app on your host. It runs its own tests, and it still cannot tell whether the page looks right, because nothing has opened it. To check its own work, it needs a browser on the machine it works on.
The Agent Browser is a real browser on your host that the agent drives itself. It opens the page it just built, clicks through it and tries it at every screen size. The browser sits on the agent’s own card: dock it beside the terminal or make it full, and watch the agent work from your Mac or your phone. It comes with Offsite, with no extension and no plugin.
Tips
- Agents without MCP have the same verbs as a command:
offsite web open http://localhost:3000. - Over a slow link, set Quality to Fast in the card’s settings. It halves the resolution.
- Add an Agent Browser card yourself, and its start page lists the web servers running in the workspace.