x64dbg MCP server

An MCP server that bridges various LLMs with the x64dbg debugger, providing direct access to debugging functionality through prompts. This tool allows you to control your debugging sessions using natural language commands, making the debugging process more intuitive and efficient.

Installation

Plugin Setup

1. Download the plugin file (.dp64 or .dp32) from the repository's build/release directory
2. Copy the file to your x64dbg plugins folder:

   [x64dbg_dir]/release/x64/plugins/
   

Claude Desktop Configuration

1. Copy the x64dbgmcp.py script from the repository's src directory
2. Update your local claude_desktop_config.json file to include the path to the script:

{
  "mcpServers": {
    "x64dbg": {
      "command": "Path\\To\\Python",
      "args": [
        "Path\\to\\x64dbg.py"
      ]
    }
  }
}

Starting the System

1. Launch x64dbg
2. Start Claude Desktop
3. Verify the plugin loaded successfully by checking the logs (press ALT+L in x64dbg)

Usage Guide

Basic Commands

You can interact with the debugger using natural language commands. Here are some examples:

Setting Breakpoints

"Set a breakpoint at the main function and step through the first few instructions"

Analyzing Memory

"Read 100 bytes from address 0x401000 and show me what's there"

Inspecting Registers

"What's the current value of RAX and RIP registers?"

Pattern Searching

"Find the pattern '48 8B 05' in the current module"

Tips for Effective Use

1. Provide Binary Context: Always inform the model about the location of your executable to enable restart capabilities:

   "init C:\Absolute\Path\to\EXE"
   

   This allows for more automated analysis and lets the system restart the binary if it crashes or hangs.

2. API Access: For faster debugging and longer tool chain calls, you can run the system from the command line using the arguments specified in the Python file (API Key, max tool calls).

3. Connection Troubleshooting: If you experience connection issues between the Python script and x64dbg, check the logs tab in x64dbg to find the port the plugin is running on, then add that port as an argument to your Python script.

Features

• Extensive Debugging Toolkit: Access to over 40 x64dbg SDK tools for comprehensive debugging capabilities
• Architecture Compatibility: Compatible with both x64dbg and x32dbg
• API Integration: Provides API access to Claude from the command line for enhanced functionality

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 "x64dbg" '{"command":"Path\\To\\Python","args":["Path\\to\\x64dbg.py"]}'

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": {
        "x64dbg": {
            "command": "Path\\To\\Python",
            "args": [
                "Path\\to\\x64dbg.py"
            ]
        }
    }
}

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": {
        "x64dbg": {
            "command": "Path\\To\\Python",
            "args": [
                "Path\\to\\x64dbg.py"
            ]
        }
    }
}

3. Restart Claude Desktop for the changes to take effect