WBX Sandbox for Gemini CLI

cz.wbx/sandbox

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

client:Gemini CLI transport:streamable-http

Install WBX Sandbox in Gemini CLI

~/.gemini/settings.json · windows: %USERPROFILE%\.gemini\settings.json

{
  "mcpServers": {
    "sandbox": {
      "httpUrl": "https://sandbox.wbx.cz/mcp"
    }
  }
}

Gemini expands $VAR and ${VAR} inside env values, so a secret can live in your shell rather than this file. Gemini CLI docs