Yes, Code Runner is free to use.

How do I install Code Runner?

Code Runner is a local plugin. Install it using npm package: mcp-server-code-runner and add the generated configuration snippet to your AI app's MCP config file. Then restart your AI app.

What AI apps work with Code Runner?

Code Runner uses the Model Context Protocol (MCP) and works with any MCP-compatible AI app, including Claude, ChatGPT / Codex, Gemini, Copilot, Cursor, and more.

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Code Runner MCP Server

by formulahendry

Developer ToolsLow Risk9.3Local

Free

Code Runner MCP Server which can run code in various programming languages.

About

Code Runner MCP Server which can run code in various programming languages.

How to Install

Add this to your MCP configuration file:

{
  "mcpServers": {
    "io-github-formulahendry-code-runner": {
      "args": [
        "-y",
        "mcp-server-code-runner"
      ],
      "command": "npx"
    }
  }
}

Security Report

9.3

Low Risk9.3Low Risk

Valid MCP server (3 strong, 3 medium validity signals). 1 code issue detected. No known CVEs in dependencies. Package registry verified. Imported from the Official MCP Registry. Trust signals: trusted author (3/3 approved).

7 files analyzed · 2 issues found

Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.