autocad-mcp

What is this?

autocad-mcp is a Model Context Protocol (MCP) server that connects Claude AI directly to AutoCAD. It gives Claude the ability to execute 684 architectural design commands — walls, doors, windows, columns, stairs, dimensions, layers, hatching, annotations, and more.

Instead of clicking through menus, you just describe what you want:

"Draw a 3-bedroom apartment. 200mm exterior walls, 100mm partitions. Add doors, windows, and auto-dimension everything."

Claude does the rest.

Requirements

• Claude Pro/Max recommended for best results (more tool calls, longer context)

• Claude Desktop or Claude Code (MCP host)

• AutoCAD 2000+ on Windows

• Node.js v18+

Related MCP server: AutoCAD MCP

How it works

┌─────────────────┐                    ┌──────────────┐                    ┌──────────────┐
│   Claude AI     │   MCP Protocol     │  autocad-mcp │   File IPC         │   AutoCAD    │
│   (Desktop /    │ ◄────────────────► │  (Node.js)   │ ◄───────────────► │              │
│    Code)        │   55 tools         │  684 commands │   C:\temp\*.json   │  Arch Plugin │
└─────────────────┘                    └──────────────┘                    └──────────────┘

1. You tell Claude what to draw in natural language

2. Claude picks the right MCP tools and calls autocad-mcp

3. autocad-mcp writes command files to C:\temp\

4. The LISP bridge in AutoCAD executes them and writes results back

5. Claude reads the results and continues — iterating until your drawing is complete

Everything happens in seconds. No manual intervention needed.

684 Commands across 22 Categories

Plus 2 generic tools:

• yq_execute — run any of the 684 commands by name

• yq_list_commands — search and browse all commands by category

Quick Start

1. Install

git clone https://github.com/xstaar/autocad-mcp.git
cd autocad-mcp
npm install && npm run build

2. Load LISP Bridge in AutoCAD

(load "C:/path/to/autocad-mcp/lisp/acad_mcp_bridge.lsp")
YQMCP-START

3. Configure Claude Desktop

Add to %APPDATA%\Claude\claude_desktop_config.json:

{
  "mcpServers": {
    "autocad": {
      "command": "node",
      "args": ["C:/path/to/autocad-mcp/dist/index.js"],
      "env": {
        "ACAD_LICENSE_KEY": "YOUR-KEY-HERE"
      }
    }
  }
}

4. Talk to Claude

"Create a structural grid 6x4m, place columns at every intersection, draw 200mm walls between them, add a main entrance door and 4 windows."

Claude will execute the commands in AutoCAD through autocad-mcp.

Licensing

How it works

1. Set your license key: set ACAD_LICENSE_KEY=ACMCP-XXXXX-XXXXX-XXXXX-XXXXX

2. Restart the server — your key auto-locks to your machine

3. One key = one machine. No exceptions.

Keys are validated through our activation server. Even with full source code access, license tokens cannot be forged — the signing key is server-side only.

Get a license

Accepted payments: PayPal, cryptocurrency (BTC, ETH, SOL, USDT, and more).

Why Claude Pro / Max?

This MCP server works with any Claude plan, but Claude Pro or Max is strongly recommended:

• More tool calls per conversation — architectural drawings need many sequential commands

• Longer context window — Claude can plan complex multi-room layouts in one go

• Priority access — no rate limits interrupting your workflow

• Extended thinking — better spatial reasoning for complex floor plans

With Claude Free, you'll hit tool call limits quickly. With Pro/Max, Claude can design and draw an entire building floor plan in a single conversation.

Architecture

autocad-mcp/
├── src/
│   ├── index.ts          # MCP server (55 tools registered)
│   ├── ipc.ts            # File-based IPC with AutoCAD
│   ├── license.ts        # Server-side activation system
│   ├── commands.ts        # Registry of all 684 commands
│   └── tools/            # Typed tool implementations
├── lisp/
│   └── acad_mcp_bridge.lsp  # AutoCAD LISP dispatcher
├── website/              # Landing page + activation API
└── dist/                 # Compiled + obfuscated output

Environment Variables

License

Proprietary Software. Source provided for transparency. See LICENSE.