Node Code Sandbox MCP

Name: Node Code Sandbox MCP
Author: alfonsograziano

alfonsograziano

Get started Repository

Runs JavaScript in disposable Docker containers with on-the-fly npm dependency installation.

Setup

Choose your client, copy the config, then fill in any required environment variables.

Add to Cursor Add to VS Code

claude mcp add node-code-sandbox --env FILES_DIR='<FILES_DIR>' -- docker 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' -e SANDBOX_MEMORY_LIMIT=512m -e SANDBOX_CPU_LIMIT=0.75 mcp/node-code-sandbox

~/.codex/config.toml

[mcp_servers.node-code-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", "-e", "SANDBOX_MEMORY_LIMIT=512m", "-e", "SANDBOX_CPU_LIMIT=0.75", "mcp/node-code-sandbox"]
env = { FILES_DIR = "<FILES_DIR>" }

# codex mcp add node-code-sandbox --env FILES_DIR='<FILES_DIR>' -- docker 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' -e SANDBOX_MEMORY_LIMIT=512m -e SANDBOX_CPU_LIMIT=0.75 mcp/node-code-sandbox

~/.cursor/mcp.json

{
  "mcpServers": {
    "node-code-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",
        "-e",
        "SANDBOX_MEMORY_LIMIT=512m",
        "-e",
        "SANDBOX_CPU_LIMIT=0.75",
        "mcp/node-code-sandbox"
      ],
      "env": {
        "FILES_DIR": "<FILES_DIR>"
      }
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "node-code-sandbox": {
      "type": "stdio",
      "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",
        "-e",
        "SANDBOX_MEMORY_LIMIT=512m",
        "-e",
        "SANDBOX_CPU_LIMIT=0.75",
        "mcp/node-code-sandbox"
      ],
      "env": {
        "FILES_DIR": "<FILES_DIR>"
      }
    }
  }
}

~/.gemini/settings.json

{
  "mcpServers": {
    "node-code-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",
        "-e",
        "SANDBOX_MEMORY_LIMIT=512m",
        "-e",
        "SANDBOX_CPU_LIMIT=0.75",
        "mcp/node-code-sandbox"
      ],
      "env": {
        "FILES_DIR": "<FILES_DIR>"
      }
    }
  }
}

claude_desktop_config.json

{
  "mcpServers": {
    "node-code-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",
        "-e",
        "SANDBOX_MEMORY_LIMIT=512m",
        "-e",
        "SANDBOX_CPU_LIMIT=0.75",
        "mcp/node-code-sandbox"
      ],
      "env": {
        "FILES_DIR": "<FILES_DIR>"
      }
    }
  }
}

.trae/mcp.json

{
  "mcpServers": {
    "node-code-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",
        "-e",
        "SANDBOX_MEMORY_LIMIT=512m",
        "-e",
        "SANDBOX_CPU_LIMIT=0.75",
        "mcp/node-code-sandbox"
      ],
      "env": {
        "FILES_DIR": "<FILES_DIR>"
      }
    }
  }
}

Environment variables

FILES_DIR

Replace the placeholders with your own credentials and keep them out of version control.

Setup

Environment variables

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