best-cad-mcp

MCP serverCommunity

A beta Windows server that works on AutoCAD entities by handle and dry-runs each edit plan before it touches the drawing. By LokmenoWer.

35 starsUpdated 9 days agoGitHub data from 5 Nov 2026

At a glance

Type: MCP server
Works with: AutoCAD
How it connects: Drives a running copy of the tool
Access: Can modify models
Tool versions: AutoCAD 2020 or newer recommended
Operating systems: Windows
Needs a AutoCAD licence: Yes
Transport: Local (stdio)
AI clients documented: Codex, Claude Code
Licence: MIT
Language: Python

What it can do

Scans the open drawing into handles and structured geometry, so edits target exact entities rather than labels or pixels.
Validates and dry-runs edit plans, executes them only on request, then rescans and compares the result.
Builds a semantic view of the drawing (objects, dimension bindings, constraints) in a local SQLite workspace.
Exports layouts, PDF, DXF and images, with optional rendered overlays for visual review.

Limitations

Beta; the author aims it at supervised work, not unattended changes to valuable drawings.
AutoCAD and the MCP client must run under the same Windows user.
View mapping is exact only for untwisted plan views; dimension binding is heuristic.

Install

python -m pip install --upgrade best-cad-mcp
cad-mcp-doctor --check-autocad

Source: github.com/LokmenoWer/best-cad-mcp#install-the-package

{
  "mcpServers": {
    "best-cad-mcp": {
      "command": "cad-mcp",
      "env": {
        "CAD_MCP_TOOL_PROFILE": "core",
        "CAD_MCP_WORKSPACE_ROOT": "C:\\CAD\\your-project"
      }
    }
  }
}

Source: github.com/LokmenoWer/best-cad-mcp#claude-code-and-other-json-configured-clients

MCP servers and skills run code on your computer. Review the source before installing.

AI-generated models, drawings and results must be checked by a qualified engineer before use.