Teaching AutoCAD to take orders in plain English

What it does

CAD-MCP is a Python-based MCP server that sits between an LLM client—such as Claude Desktop, Cursor, or Windsurf—and Windows CAD software. It translates natural language prompts into COM API calls for AutoCAD, GstarCAD, or ZWCAD, letting you create lines, circles, dimensions, layers, and text by describing what you want rather than navigating ribbons and toolbars.

The interesting bit

The project is essentially a language-to-CAD translation layer: glue code that maps parsed shape, color, and action keywords into concrete drawing parameters, then fires them at a running CAD process over Windows COM. That makes it less a drawing app and more a remote-control rig for software that predates LLMs by decades.

Key highlights

• Supports AutoCAD, GstarCAD, and ZWCAD via Windows COM interfaces
• Handles basic drafting primitives: lines, arcs, polylines, rectangles, circles, text, hatches, and linear dimensions
• Includes layer creation, switching, and DWG export
• Plugs into MCP-compatible editors using server.py
• Parses color, shape, and action keywords from free-form text commands

Caveats

• Windows-only, because it relies on pywin32 COM automation
• Requires a locally installed, supported CAD license; it is not a standalone renderer
• The README exposes startup_wait_time and command_delay settings, hinting that CAD process lifecycle management can be finicky

Verdict

Best for Windows-based drafters and developers who want to experiment with LLM-driven automation inside existing CAD suites. If you do not already have a licensed copy of AutoCAD, GstarCAD, or ZWCAD, there is nothing here to draw with.