How to use box by Simular with Gemini

box by Simular gives Gemini a computer in the cloud. Add it to the Gemini app as a custom app, or to Gemini CLI with one command. Gemini can then browse, sign in, fill forms and use desktop apps on the box.

Read the Quick Start

What Gemini can do with box

• Research across sites that need a login. Gemini uses the browser already signed in on the box.
• Turn a request into a file. "Collect this week's prices from these three sites into a sheet" ends with a spreadsheet saved on the box.
• Work from your phone. Once added on the web, box also works in the Gemini mobile app.

Set up box in Gemini

In the Gemini app, box is a custom app you add once on gemini.google.com; Google limits which accounts can add one. In Gemini CLI, it takes one command. Follow Gemini or Gemini CLI in the MCP guide.

In a chat, type @ and pick box, then ask for a task.

Try these prompts

• "@box Open Chrome, search for flights from SFO to Tokyo next Friday and list the 3 cheapest."
• "@box Go to news.ycombinator.com and give me today's top 5 stories in a table."
• (Gemini CLI) "Use box to open my app at <URL> and check that the sign-up form works."

FAQ

• Why can't I see Custom apps in Gemini? Google allows custom apps only for some accounts; the Gemini steps in the MCP guide say which. Otherwise, use Gemini CLI.
• Does box work in the Gemini mobile app? Yes, once you add it on the web.
• Does it use my Gemini plan? Gemini uses its own model. Model calls made by box's own tools use box credits.
• Can my other agents use the same box? Yes. Claude, ChatGPT and coding agents all share the same box.

Troubleshooting

No box tools, or box missing from the @ menu? See Gemini or Gemini CLI in the MCP guide, and Troubleshooting.

Related: Quick Start · Connect box over MCP