NX_MCP

# NX MCP Server MCP (Model Context Protocol) server for Siemens NX (UG). Enables AI agents to programmatically control NX's GUI for CAD operations. ## Features - **47 MCP tools** covering core CAD operations - File operations: create, open, save, close, export, import - Sketching: lines, arcs, rectangles, constraints - Modeling: extrude, revolve, sweep, blend, chamfer, hole, pattern, boolean, mirror - Assembly: add components, mate, list, reposition - Drawing: create sheets, add views, dimensions, export PDF - Measurement: distance, angle, volume - Utility: view control, undo, screenshot, journal recording - Feature tree: list features, inspect parameters, bounding box ## Prerequisites - Siemens NX 2300+ (2023+) - Python 3.10+ - NX Open Python API (bundled with NX) ## Installation ```bash pip install -e . ``` ## Configuration ### Claude Code Add to `.claude/settings.local.json`: ```json { "mcpServers": { "nx-mcp": { "command": "python", "args": ["-m", "nx_mcp.server"], "env": { "UGII_BASE_DIR": "C:\\Program Files\\Siemens\\NX2300" } } } } ``` ### Generic MCP Client Start the server via stdio: ```bash python -m nx_mcp.server ``` ## Usage 1. Start Siemens NX 2. Ensure your MCP client has the server configured 3. Ask your AI agent to perform NX operations Example prompts: - "Create a new part called bracket.prt" - "Draw a 50x30 rectangle on the XY plane and extrude it 20mm" - "Add a 3mm fillet to all edges" - "Export the current part as STEP" ## Testing ```bash pip install -e ".[dev]" pytest tests/ -v ``` Tests run with mocked NX Open — no NX installation required. ## Architecture ``` AI Agent <-> MCP Protocol (stdio) <-> MCP Server (Python) <-> NX Open API <-> NX Application ``` ## Project Structure ``` src/nx_mcp/ server.py # MCP server entry point nx_session.py # NX session wrapper (singleton) response.py # ToolResult / ToolError response types tools/ registry.py # @mcp_tool decorator and ToolRegistry file_ops.py # File operations (8 tools) sketch.py # Sketch tools (7 tools) modeling.py # Modeling features (11 tools) feature_tree.py # Feature queries (3 tools) assembly.py # Assembly tools (4 tools) drawing.py # Drawing tools (5 tools) measure.py # Measurement tools (3 tools) utility.py # View, undo, screenshot, journal (7 tools) utils/ geometry.py # Point3d, Vector3d, object resolution helpers selection.py # ScCollector creation helpers tests/ test_tools/ # Per-module test suites (120 tests, all mocked) ``` ## License MIT