Claude Code MCP server

The claude-code-mcp server allows you to harness the power of Claude Code from various environments. It acts as a bridge to the locally installed Claude Code command, offering tools for explaining, reviewing, fixing, editing, testing code, simulating commands, and sending custom queries.

Installation Options

Using npx (Recommended)

The quickest way to use the server is with npx:

npx @kunihiros/claude-code-mcp

Global Installation

Install the package globally for command-line access:

npm install -g claude-code-mcp

Then run it as a command:

claude-code-mcp

Configuration

You'll need to configure the server using environment variables through one of these methods:

MCP Host Configuration (Recommended)

Add this to your MCP Host application settings (e.g., Claude Desktop):

"claude-code-server": {
  "command": "npx",
  "args": [
    "-y",
    "@kunihiros/claude-code-mcp"
  ],
  "env": {
    "CLAUDE_BIN": "/path/to/your/claude/executable",
    "LOG_LEVEL": "info"
  },
  "disabled": false
}

Environment Variables File

Alternatively, create a .env file in your current directory or a global .claude-code-mcp.env file in your home directory:

CLAUDE_BIN=/path/to/your/claude/executable
LOG_LEVEL=info

Available Tools

The server provides several useful tools:

• explain_code: Get detailed explanations of code
• review_code: Have code reviewed for improvements
• fix_code: Fix bugs or issues in code
• edit_code: Make changes to code based on instructions
• test_code: Generate tests for code
• simulate_command: Simulate command execution
• your_own_query: Send custom queries with context

Environment Variables

Configure these environment variables:

• CLAUDE_BIN (Required): Path to the Claude CLI executable
  • Example: /home/linuxbrew/.linuxbrew/bin/claude or C:\Users\YourUser\AppData\Local\bin\claude.exe
• LOG_LEVEL (Optional): Set logging level (debug, info, warn, error)

Prerequisites

Before using claude-code-mcp, ensure you have:

• Node.js (v18 or newer, tested with v22.14.0)
• npm (or yarn)
• Claude Code command installed and authenticated (See installation guide)

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 "claude-code-server" '{"command":"npx","args":["-y","@kunihiros/claude-code-mcp"],"env":{"CLAUDE_BIN":"/path/to/your/claude/executable","LOG_LEVEL":"info"},"disabled":false}'

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": {
        "claude-code-server": {
            "command": "npx",
            "args": [
                "-y",
                "@kunihiros/claude-code-mcp"
            ],
            "env": {
                "CLAUDE_BIN": "/path/to/your/claude/executable",
                "LOG_LEVEL": "info"
            },
            "disabled": false
        }
    }
}

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": {
        "claude-code-server": {
            "command": "npx",
            "args": [
                "-y",
                "@kunihiros/claude-code-mcp"
            ],
            "env": {
                "CLAUDE_BIN": "/path/to/your/claude/executable",
                "LOG_LEVEL": "info"
            },
            "disabled": false
        }
    }
}

3. Restart Claude Desktop for the changes to take effect