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FreeCAD MCP

by bonninr
GitHub
Python
MIT License
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local-only server

The server can only run on the client’s local machine because it depends on local resources.

Integrations

  • Enables creation and manipulation of 3D objects, parametric modeling operations, document management, and export/import capabilities in FreeCAD through natural language commands.

FreeCAD MCP (Model Control Protocol)

Overview

The FreeCAD MCP (Model Control Protocol) provides a simplified interface for interacting with FreeCAD through a server-client architecture. This allows users to execute commands and retrieve information about the current FreeCAD document and scene.

https://github.com/user-attachments/assets/5acafa17-4b5b-4fef-9f6c-617e85357d44

Configuration

To configure the MCP server, you can use a JSON format to specify the server settings. Below is an example configuration:

{ "mcpServers": { "freecad": { "command": "C:\\ProgramData\\anaconda3\\python.exe", "args": [ "C:\\Users\\USER\\AppData\\Roaming\\FreeCAD\\Mod\\freecad_mcp\\src\\freecad_bridge.py" ] } } }

Configuration Details

  • command: The path to the Python executable that will run the FreeCAD MCP server. This can vary based on your operating system:
    • Windows: Typically, it might look like C:\\ProgramData\\anaconda3\\python.exe or C:\\Python39\\python.exe.
    • Linux: It could be /usr/bin/python3 or the path to your Python installation.
    • macOS: Usually, it would be /usr/local/bin/python3 or the path to your Python installation.
  • args: An array of arguments to pass to the Python command. The first argument should be the path to the freecad_bridge.py script, which is responsible for handling the MCP server logic. Make sure to adjust the path according to your installation.

Example for Different Operating Systems

Windows

{ "mcpServers": { "freecad": { "command": "C:\\ProgramData\\anaconda3\\python.exe", "args": [ "C:\\Users\\USER\\AppData\\Roaming\\FreeCAD\\Mod\\freecad_mcp\\src\\freecad_bridge.py" ] } } }

Linux

{ "mcpServers": { "freecad": { "command": "/usr/bin/python3", "args": [ "/home/USER/.FreeCAD/Mod/freecad_mcp/src/freecad_bridge.py" ] } } }

macOS

{ "mcpServers": { "freecad": { "command": "/usr/local/bin/python3", "args": [ "/Users/USER/Library/Preferences/FreeCAD/Mod/freecad_mcp/src/freecad_bridge.py" ] } } }

Features

The FreeCAD MCP currently supports the following functionalities:

1. get_scene_info

  • Description: Retrieves comprehensive information about the current FreeCAD document, including:
    • Document properties (name, label, filename, object count)
    • Detailed object information (type, position, rotation, shape properties)
    • Sketch data (geometry, constraints)
    • View information (camera position, direction, etc.)

2. run_script

  • Description: Executes arbitrary Python code within the FreeCAD context. This allows users to perform complex operations, create new objects, modify existing ones, and automate tasks using FreeCAD's Python API.

Example Usage

To use the FreeCAD MCP, you can connect to the server and send commands as follows:

import socket import json # Connect to the FreeCAD MCP server client = socket.socket(socket.AF_INET, socket.SOCK_STREAM) client.connect(('localhost', 9876)) # Example: Get scene information command = { "type": "get_scene_info" } client.sendall(json.dumps(command).encode('utf-8')) # Receive the response response = client.recv(4096) print(json.loads(response.decode('utf-8'))) # Example: Run a script script = """ import FreeCAD doc = FreeCAD.ActiveDocument box = doc.addObject("Part::Box", "MyBox") box.Length = 20 box.Width = 20 box.Height = 20 doc.recompute() """ command = { "type": "run_script", "params": { "script": script } } client.sendall(json.dumps(command).encode('utf-8')) # Receive the response response = client.recv(4096) print(json.loads(response.decode('utf-8'))) # Close the connection client.close()

Installation

  1. Clone the repository or download the files.
  2. Place the freecad_mcp directory in your FreeCAD modules directory:
    • Windows: %APPDATA%/FreeCAD/Mod/
    • Linux: ~/.FreeCAD/Mod/
    • macOS: ~/Library/Preferences/FreeCAD/Mod/
  3. Restart FreeCAD and select the "FreeCAD MCP" workbench from the workbench selector.

Contributing

Feel free to contribute by submitting issues or pull requests. Your feedback and contributions are welcome!

License

This project is licensed under the MIT License. See the LICENSE file for details.

This server cannot be installed

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security - not tested
A
license - permissive license
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quality - not tested

A FreeCAD addon that implements the Model Context Protocol (MCP) to enable communication between FreeCAD and Claude AI through Claude Desktop.

  1. Overview
    1. Configuration
      1. Configuration Details
      2. Example for Different Operating Systems
    2. Features
      1. 1. get_scene_info
      2. 2. run_script
      3. Example Usage
    3. Installation
      1. Contributing
        1. License

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