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@focus-mcp/brick-sandbox

v1.2.2

Published

Sandboxed code execution — run JavaScript/TypeScript snippets in an isolated VM context.

Vulnerabilities

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  • 0Low

Links

Git

Maintainers

samueldssamuelds

Keywords

mcpmodel-context-protocolaillmfocusbricksandboxexecutionvmjavascriptdevtools

Readme

@focusmcp/sandbox

Sandboxed code execution — run JavaScript snippets in an isolated Node.js VM context.

Tools

| Tool | Exposed as | Description | |------|-----------|-------------| | run | box_run | Execute a JavaScript snippet in a sandboxed VM context | | file | box_file | Read a JS file and execute it in the sandbox | | eval | box_eval | Evaluate a single JavaScript expression | | languages | box_languages | List supported languages and their status |

Security

  • Uses Node.js node:vm module — no unsafe dynamic evaluation methods
  • Isolated context: process, require, __dirname, global are not available
  • Configurable execution timeout (default: 5000ms for run/file, 2000ms for eval)
  • Errors are caught and returned gracefully — no exceptions propagate to the caller