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box by Simular MCP Server

answering

box by Simular is answering right now. Last checked 3 min ago. Last commit 4 Nov 2026.

A cloud Linux desktop for your AI: browse, click, type, read the screen and run commands.

Uptime history 6 days of history · worst day 99%
6 days agonow
100.0%
Uptime 24h
184 of 184 checks
—
Tools
hidden behind auth
291 ms
Response time
average over 24h
0
Stars
last commit 4 Nov 2026

What the code does

We read the source, 3 d ago · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

      const candidate = path.join(dir, bin + ext)
    spawn(command[0], command[1], { stdio: 'ignore', detached: true, shell: false, windowsVerbatimArguments: false }).on('error', () => {}).unref()
Touches key and credential files cli/src/offload/offloader.js:199
      if (entry === 'aws') return [read(path.join(home, '.aws/credentials'), 'secrets/aws')]

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 3 min ago.

run in your terminal
claude mcp add box --transport http https://relay.simular.cloud/mcp
Settings → Connectors → Add custom connector, then paste this address
https://relay.simular.cloud/mcp
~/.codex/config.toml
[mcp_servers.box]
url = "https://relay.simular.cloud/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "box": {
      "url": "https://relay.simular.cloud/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "box": {
      "type": "http",
      "url": "https://relay.simular.cloud/mcp"
    }
  }
}

This endpoint answered with an authorization challenge. The server is running, and it signs you in through your browser: there is no API key to paste.

This server publishes 1 more address. The block above uses the one we reach during checks; the full list is under Endpoints below, and the author may intend a particular one for your client.

Endpoints

URLTransportStateLatencyChecked
https://relay.simular.cloud/mcp streamable-http sign-in 244 ms 3 min ago
https://mcp.box.simular.ai/mcp streamable-http sign-in 150 ms 3 min ago

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box by Simular — questions

Answers built from our own checks of this server.

Why is there no tool list for box by Simular?
The server answered our handshake with an authorization challenge, so it is running — but it will not describe its tools to an anonymous client. To see them you need to connect with your own credentials. We record it as alive, not as broken: 100.0% of checks in the last 24 hours got a reply.
Is box by Simular working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 184 of 184 checks got a reply (100.0%), average response time 291 ms. The bar chart above shows every period we have measured.
How do I connect box by Simular?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address. You sign in through your browser once and the client keeps the session: no key to copy, and it refuses anonymous clients.
How do you sign in to box by Simular?
No API key is involved. box by Simular answers our knock with an OAuth challenge, so you authorise it once in your browser and the client keeps the session. That is also why we see no tool list: it will not describe itself to an anonymous client, and that is the server working as intended, not a fault.
How fast is box by Simular?
It answers our handshake in 291 ms on average, which is faster than 48% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is box by Simular open source?
The code is open source: it is published under the MIT licence, written in JavaScript, 0 stars on GitHub and 9 open issues. The licence covers the code in the repository, not the hosted service at relay.simular.cloud, which runs on its operator's own terms.