siemens-nx-mcp

siemens-nx-mcp is an MCP server that lets an AI assistant model, inspect, and draw in Siemens NX on Windows through NXOpen. Its stated coverage is parts, sketches, curves, features, synchronous edits, body repair, freeform surfaces, sheet metal, assemblies with arrangements and clearance sets, motion, topology optimization, strength checks, measurements, surface analysis, drawings, part families, Knowledge Fusion rules, render materials, decals, and exports to STEP, PDF, and DXF/DWG. The README lists 269 tools and states the server was tested on NX 2406, with NX 2412 to 2606 expected to work.

The server starts through an NX journal (Alt+F8, nx_app/journals/start.py), which opens a small NX MCP panel; the add-on runs until NX closes. The agent works only in parts it created or opened, never closes the user's parts, and changes or saves one only after the user ticks Allow agent to change on the panel. In Auto mode, steps that change something wait while the user is in an NX command or dialog; in Ask me first mode, every agent step waits for approval.

Files go in a dedicated NX_MCP_WORKSPACE folder under the user's home directory. Long NX calls such as exports and imports can take a minute or more, so the README advises raising the client's tool timeout.