FreeCAD MCP is an open-source Model Context Protocol (MCP) server that enables AI assistants to interact with FreeCAD, the popular open-source parametric 3D CAD modeler. By implementing the MCP standard, FreeCAD MCP allows AI tools like Claude, ChatGPT, and other LLMs to directly control and automate FreeCAD workflows.

What is FreeCAD MCP?

FreeCAD MCP bridges the gap between AI assistants and CAD automation. It provides a standardized interface for AI models to:

Create and modify 3D models programmatically
Extract design parameters and features
Generate technical drawings automatically
Perform batch operations on CAD files
Integrate CAD workflows with AI-powered design tools

Key Features

The FreeCAD MCP server implements the Model Context Protocol specification, providing:

Full FreeCAD API Access - Complete control over FreeCAD's Python API
Sketch Creation - Automated 2D sketch generation with constraints
3D Operations - Extrude, revolve, loft, and other 3D operations
Parametric Design - Modify parameters and see real-time updates
File Management - Open, save, and export in multiple CAD formats
Assembly Tools - Create and manage complex assemblies

Installation


# Clone the FreeCAD MCP repository

git clone https://github.com/contextform/freecad-mcp.git



# Install dependencies

cd freecad-mcp

npm install



# Start the MCP server

npm start

Use Cases

AI-Assisted Design - Let AI help you create complex geometries
Batch Processing - Automate repetitive CAD tasks
Design Optimization - Use AI to optimize parameters
Documentation Generation - Auto-generate technical drawings
Quality Checks - Automated design validation and testing

Why FreeCAD MCP?

Traditional CAD automation requires deep knowledge of scripting languages and CAD APIs. FreeCAD MCP changes this by allowing you to describe what you want in natural language, and letting AI handle the implementation details. Whether you're a mechanical engineer, product designer, or hobbyist, FreeCAD MCP makes CAD automation accessible to everyone.

Open Source & Community

FreeCAD MCP is completely open source and welcomes contributions from the community. Whether you want to add new features, fix bugs, or improve documentation, your contributions are valued.

Documentation & Support

Quick start guides
API documentation
Example scripts and use cases
Troubleshooting guides
Community support via GitHub Issues