Code Runner MCP server

The MCP Code Runner is a tool that executes code based on the Model Context Protocol (MCP). It utilizes Docker to run code in isolated environments, requiring a Docker installation on your machine to function properly.

Installation Requirements

Before installing the MCP Code Runner, ensure you have:

• Docker installed on your system
• Network connectivity for downloading Docker images

Getting Started

Installation

To install the MCP Code Runner, follow these steps:

# Clone the repository
git clone https://github.com/axliupore/mcp-code-runner.git

# Navigate to the project directory
cd mcp-code-runner

# Install dependencies (if needed)
npm install

Running the Server

Start the MCP server with:

npm start

Using the MCP Code Runner

Basic Usage

The MCP Code Runner allows you to execute code through the Model Context Protocol. Here's how to use it:

1. Ensure the server is running
2. Send code execution requests following the MCP protocol format
3. Receive execution results in the response

Example Request

{
  "code": "print('Hello, World!')",
  "language": "python"
}

Supported Languages

The code runner supports various programming languages including:

• Python
• JavaScript
• Java
• C++
• And more (check the server documentation for the complete list)

Limitations

Currently, the MCP Code Runner provides execution results but has limitations:

• Does not yet provide execution time metrics
• Does not yet provide memory usage information

For more information, visit the Smithery.ai server page.

How to install this MCP server

For Claude Code

To add this MCP server to Claude Code, run this command in your terminal:

claude mcp add-json "mcp-code-runner" '{"command":"npx","args":["-y","@axliupore/mcp-code-runner"]}'

See the official Claude Code MCP documentation for more details.

For Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

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

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.

For Claude Desktop

To add this MCP server to Claude Desktop:

1. Find your configuration file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

2. Add this to your configuration file:

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

3. Restart Claude Desktop for the changes to take effect