nx-auto-mcp

MCP serverCommunity

A Node.js stdio adapter and signed NXOpen plug-in exposing 130+ NX modelling, sketch, assembly and measure tools. By cyw2527.

10 starsUpdated 7 weeks agoGitHub data from 5 Nov 2026

At a glance

Type: MCP server
Works with: Siemens NX
How it connects: Drives a running copy of the tool
Access: Can modify models
Tool versions: Developed against NX 2412; other versions need API compatibility testing
Operating systems: Windows
Needs a Siemens NX licence: Yes
Transport: Local (stdio)
AI clients documented: Claude Code
Licence: MIT
Language: C#

What it can do

Runs a resident C# NXOpen plug-in inside NX and talks to it over TCP port 1977, which the author measures at 10 to 50 ms per call.
Covers modelling, sketching, assemblies and measurement through more than 130 tools.
Includes a diagnostic script that checks the NX process, the TCP port, the plug-in version and the startup logs.

Limitations

Ships source only; you build and sign the plug-in on your own machine with NX's SignDotNet.exe.
Warns when the detected NX is not 2412, since APIs may differ.

Install

cd plugin
.\build.bat run

Source: github.com/cyw2527/nx-auto-mcp#install

{
  "mcpServers": {
    "nx-auto-mcp": {
      "type": "stdio",
      "command": "node",
      "args": ["C:/path/to/nx-auto-mcp/mcp/nx-auto-mcp.js"]
    }
  }
}

Source: github.com/cyw2527/nx-auto-mcp#install

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.