AutoCAD MCP for Piping & Pipe Supports

MCP serverCommunity

A piping engineer's server for AutoCAD and Plant 3D drawings, live over COM or offline on DXF, built around pipe-support block registers. By C48H74.

5 starsUpdated 5 weeks agoGitHub data from 5 Nov 2026

At a glance

Type: MCP server
Works with: AutoCAD Plant 3D, AutoCAD
How it connects: Drives a running copy of the tool
Access: Can modify models
Tool versions: Live tests passed on AutoCAD Plant 3D 2021 only; headless DXF engine needs no AutoCAD
Operating systems: Windows, macOS, Linux
Needs a AutoCAD Plant 3D licence: No
Transport: Local (stdio)
AI clients documented: Claude Desktop
Licence: MIT
Language: Python

What it can do

Reads and updates block attributes such as support TAG, type and line, and round-trips them with Excel keyed by TAG.
Snapshots, audits and compares pipe-support registers across drawing revisions.
Creates, dimensions and edits DXF drawings offline, with paper layouts and PDF, PNG or SVG export.
Plots to PDF through AutoCAD's own plotter and checks layers against a standard in a live session.

Limitations

Treats Plant 3D drawings as generic AutoCAD objects; no Plant 3D SDK, project database, spec-driven routing or isometrics.
Model space only, and DWG files need a running AutoCAD; the offline engine reads and writes DXF.
Tool descriptions and diagnostics are in Portuguese; run_lisp is off by default and isn't a sandbox.

Install

git clone https://github.com/C48H74/autocad-mcp.git
cd autocad-mcp
py -3 -m venv .venv
.\.venv\Scripts\python.exe -m pip install -e ".[dev]"   # installs ezdxf and matplotlib too
Copy-Item config.example.toml config.toml

Source: github.com/C48H74/autocad-mcp#install

{
  "mcpServers": {
    "autocad": {
      "command": "C:\\path\\to\\autocad-mcp\\.venv\\Scripts\\python.exe",
      "args": ["-m", "autocad_mcp"],
      "env": { "AUTOCAD_MCP_CONFIG": "C:\\path\\to\\autocad-mcp\\config.toml" }
    }
  }
}

Source: github.com/C48H74/autocad-mcp#wire-it-to-claude-desktop

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.