Node.js Code Sandbox

创建者

Alfonso Grazianoa year ago

Node.js server implementing the Model Context Protocol (MCP) for running arbitrary JavaScript in ephemeral Docker containers with on‑the‑fly npm dependency installation.

# node.js

# javascript

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概览

What is Node.js Code Sandbox?

Node.js Code Sandbox is a server that implements the Model Context Protocol (MCP) for executing arbitrary JavaScript code in isolated Docker containers, allowing for on-the-fly npm dependency installation.

How to use Node.js Code Sandbox?

To use the Node.js Code Sandbox, ensure Docker is installed and running on your machine. Connect the server to a client (like Claude Desktop) and run JavaScript scripts by sending commands to the server.

Key features of Node.js Code Sandbox?

Start and manage isolated Node.js sandbox containers.
Execute arbitrary shell commands inside containers.
Install specified npm dependencies per job.
Run ES module JavaScript snippets and capture stdout.
Cleanly tear down containers after execution.
Detached Mode: Keep the container alive for long-running processes.

Use cases of Node.js Code Sandbox?

Running quick JavaScript experiments in a safe environment.
Testing and executing scripts that require specific npm packages.
Developing and debugging Node.js applications in isolated containers.

FAQ from Node.js Code Sandbox?

What are the prerequisites for using this server?

Docker must be installed and running on your machine.

Can I run long-lived services with this server?

Yes! You can use Detached Mode to keep containers alive for long-running services.

How do I save files generated by my scripts?

Files can be saved during script execution and will be returned automatically.

服务器配置

{
  "mcpServers": {
    "js-sandbox": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-v",
        "/var/run/docker.sock:/var/run/docker.sock",
        "-v",
        "$HOME/Desktop/sandbox-output:/root",
        "-e",
        "FILES_DIR=$HOME/Desktop/sandbox-output",
        "alfonsograziano/node-code-sandbox-mcp"
      ]
    }
  }
}

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