How to use box by Simular with Meta Muse

box by Simular gives Muse a computer it shares with your other agents. It is a Linux desktop in the cloud with Chrome, files and a shell. Add it to Muse as a custom connector, and Muse can open websites, sign in, use desktop apps and pick up work that Claude or ChatGPT started on the same box.

Read the Quick Start

What Muse can do with box

• Use the accounts you already signed in to. Log in once in Chrome on the box; Muse, Claude and ChatGPT all use the same signed-in browser.
• Pick up another agent's work. Claude started a spreadsheet on the box; Muse finishes it, with the same file still open.
• Work you can watch. Open the live view to see each step, and take control when a site asks for a code.

Set up box in Muse

1. Copy the setup prompt from the Quick Start into a Muse chat.
2. Then tell Muse to add box by Simular as a custom MCP connector:

   Install box by Simular as a custom MCP connector.

   Copy
3. Sign in to box and click Allow when asked.

Try these prompts

• "Use box to open Chrome, search Google for 'Simular', and summarize the top 3 results."
• "Use box to go to news.ycombinator.com and give me today's top 5 stories in a table."
• "Use box to open the sheet Claude left on the box and fill in this week's prices."

Watch it and take control

Open your box to watch the desktop live. When a step needs you, such as a sign-in, a code or a payment, take control and do it yourself, then hand it back.

What box adds to Muse

box by Simular adds one desktop that all your agents share: the same Chrome logins, files and open apps for Muse, Claude, ChatGPT and your coding agents, with a live view you can take over.

FAQ

• Does it use my Muse plan? Muse uses its own model. Model calls made by box's own tools use box credits.
• Where are my logins kept? Your passwords and cookies stay in Chrome on your box.
• Will it pay for things without asking? No. box's own agent never enters payment details; it hands that step to you to take over on the box. Agents you connect are told to do the same.
• Can my other agents use the same box? Yes. Claude, ChatGPT and coding agents all share the same box.

Related: Quick Start · Connect box over MCP