x64dbg MCP server

An MCP server for x64dbg that bridges language models with the debugger's functionality, allowing you to control x64dbg through natural language prompts. This plugin provides direct access to debugging capabilities, enabling you to analyze programs, set breakpoints, and examine memory and registers using conversational commands.

Installation

Plugin Installation

1. Download the appropriate plugin file from the repository:

   • .dp64 for 64-bit systems
   • .dp32 for 32-bit systems

2. Copy the plugin file to your x64dbg plugins directory:

   [x64dbg_installation_directory]/release/x64/plugins/
   

Configure Claude Desktop

1. Copy the x64dbgmcp.py file from the repository's src directory to your local machine

2. Update your local claude_desktop_config.json with the path to the MCP script:

   {
     "mcpServers": {
       "x64dbg": {
         "command": "Path\\To\\Python",
         "args": [
           "Path\\to\\x64dbgmcp.py"
         ]
       }
     }
   }
   

Getting Started

1. Launch x64dbg
2. Start Claude Desktop
3. Verify the plugin loaded successfully by pressing ALT+L in x64dbg to check the logs

Using the MCP Server

The MCP server allows you to interact with x64dbg through natural language commands. Here are some examples of how you can use it:

Basic Debugging Commands

You can control x64dbg with natural language prompts:

• Setting breakpoints:

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

• Memory inspection:

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

• Register examination:

  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

• Provide the full path of the binary when initializing to enable automatic restart capabilities:

  init C:\Absolute\Path\to\EXE
  

  This allows the model to restart the binary if it crashes or hangs during analysis.

• The MCP server provides access to over 40 x64dbg SDK tools, giving you comprehensive debugging capabilities through conversational commands.

• The plugin works with both x64dbg and x32dbg, offering cross-architecture support for your debugging needs.

• For faster debugging and longer consecutive tool chain calls, you can use the API access to Claude from the command line.

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