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WBX Sandbox MCP Server

answering

WBX Sandbox is answering right now. Last checked 11 min ago.

Firecracker microVM sandboxes for AI agents: run code, jobs and batches with per-job cost caps.

Uptime history 21 hours of history
21 hours agonow
100.0%
Uptime 24h
76 of 76 checks
—
Tools
hidden behind auth
208 ms
Response time
average over 24h
OAuth sign-in
Access
streamable-http

Nothing serious here today

Today is the operative word: we check WBX Sandbox every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

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 11 min ago.

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

Endpoints

URLTransportStateLatencyChecked
https://sandbox.wbx.cz/mcp streamable-http sign-in 185 ms 11 min ago

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WBX Sandbox — questions

Answers built from our own checks of this server.

Why is there no tool list for WBX Sandbox?
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 WBX Sandbox working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 76 of 76 checks got a reply (100.0%), average response time 208 ms. The bar chart above shows every period we have measured.
How do I connect WBX Sandbox?
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 WBX Sandbox?
No API key is involved. WBX Sandbox 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 WBX Sandbox?
It answers our handshake in 208 ms on average, which is faster than 65% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.