cizgen-mcp

cizgen-mcp

Drive the drawing currently open in AutoCAD from any MCP host — Claude Desktop, Claude Code, Cursor, VS Code — using your own AI subscription.

Cizgen MCP exposes 40+ deterministic CAD tools over the Model Context Protocol: region-scoped reading (overview, queries, renders the model can see, measurements), quantity takeoff aggregation, drawing hygiene audits, and drawing/editing where every write goes preview → your explicit approval → commit (approval prompt appears in-chat, or inside AutoCAD as a fallback).

Requirements

• Windows with AutoCAD 2025/2026 and the Cizgen plugin ≥ v1.0.10 (cizgen.app/download)
• A Cizgen MCP subscription and API key — generate at cizgen.app → Dashboard → MCP
• Node.js ≥ 20 (for this npm package; the Claude Desktop .mcpb package needs no Node)

Setup

Claude Code

claude mcp add cizgen -e CIZGEN_MCP_API_KEY=czmcp_... -- npx -y cizgen-mcp

Cursor / VS Code / other MCP hosts — add to the host's MCP config:

{
  "mcpServers": {
    "cizgen": {
      "command": "npx",
      "args": ["-y", "cizgen-mcp"],
      "env": { "CIZGEN_MCP_API_KEY": "czmcp_..." }
    }
  }
}

Claude Desktop — install the one-click .mcpb package instead (no Node needed): download it from the cizgen.app dashboard, double-click, and paste your API key.

Open AutoCAD with a drawing, then ask your AI assistant to look at it.

Environment variables

How it connects

The server talks to the Cizgen AutoCAD plugin over a local named pipe restricted to your Windows user. Commits are gated by a cryptographic approval token minted only after a human approves — the model can never make changes permanent on its own. Subscription state is verified against cizgen.app and cached (signed) for 72h of offline grace.

Cizgen — cizgen.app. Use requires an active subscription; see LICENSE.