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mcp/harbor
Grok

WBX Sandbox for Grok

cz.wbx/sandbox

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

client:Grok transport:streamable-http

Install WBX Sandbox in Grok

.mcp.json (in your project root) 

{
  "mcpServers": {
    "sandbox": {
      "type": "http",
      "url": "https://sandbox.wbx.cz/mcp"
    }
  }
}

Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs

WBX Sandbox in other clients

WBX Sandbox MCP server