code-runner

About code-runner

Use code-runner with your agent

claude mcp add code-runner -- npx -y mcp-server-code-runner

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

Frequently asked questions

What is code-runner?

code-runner is an MCP (Model Context Protocol) server by formulahendry in the Code Execution category. Code Runner MCP Server which can run code in various programming languages.

How do I connect code-runner to Claude, Cursor, or another MCP client?

Install code-runner from its npm package (mcp-server-code-runner) and register it under "mcpServers" in your client's MCP configuration — for example claude_desktop_config.json or Cursor's mcp.json — then restart the client.

Is code-runner open source?

Yes — the source code is public at github.com/formulahendry/mcp-server-code-runner, with 241 GitHub stars.

Can AI agents pay to use code-runner?

Not yet through Loomal — code-runner is listed as a free directory entry. If its maintainer verifies ownership, they can set per-call USDC pricing that agents pay over x402, with settlement on Base.