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Vwx MCP

Vectorworks 2026 MCP server — 150 tools controlling live VW via Python vs.* API. FastMCP + TCP socket bridge

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vwx-mcp

Vectorworks 2026 MCP server — 150 tools, pure Python, no C++ compilation.

Mirrors the QGIS MCP architecture: FastMCP HTTP bridge → TCP socket → Python plugin inside Vectorworks.

Architecture

Claude Code
    │ streamable-http :8082
    ▼
mcp-server/vwx_mcp_server.py    (FastMCP)
    │ TCP :9878, JSON newline-delimited (persistent, multi-message)
    ▼
vwx-plugin/vw_mcp_bridge.py      (runs inside Vectorworks)
    ├── bg thread: socket I/O only (loops reading framed JSON)
    ├── queue:    cmd_queue / result_map / result_events
    └── main thread: vs.* dispatch via RegisterDialogForTimerEvents (100ms)
        ▼
Vectorworks 2026  (vs.* Python API — 3071 functions, 73 categories)

Dialog events observed on VW2026 (for reference): setup=12255, teardown=12256, timer=13028, cancel=2.

Install

Copy vwx-plugin/ contents to %APPDATA%\Nemetschek\Vectorworks\2026\Plug-ins\VWX-MCP\
Copy mcp-server/vwx_mcp_server.py to %USERPROFILE%\.local\share\vwx-mcp\
Copy bridge/vwx-mcp.bat to %USERPROFILE%\bridge\
Ensure python on PATH. Install deps: pip install mcp fastmcp

Run

Launch Vectorworks 2026
In VW: File → Scripts → Run Script → pick vwx_mcp_bridge.py from plugin dir
Dialog shows "Active — TCP :9878" (keeps VW in modal event loop so main-thread pump works)
Outside VW: double-click bridge\vwx-mcp.bat → FastMCP listens on http://127.0.0.1:8082/mcp

Add MCP client config:

{
  "vwx-mcp": {
    "type": "http",
    "url": "http://127.0.0.1:8082/mcp"
  }
}

Test with the ping tool.

Known constraint

Bridge dialog is modal — blocks VW UI while active. Click Stop to reclaim VW. VW Python has no non-modal main-thread timer; this is a platform limitation, not a design choice.

Tools (116)

Document · Layers · Classes · Object Query · Object Manipulation · 2D Drawing · 3D Drawing · Symbols · Appearance · Records · IFC/BIM · Architectural (walls/spaces) · Landscape/Plants · Site Model · Viewports · Worksheets · Export/Import · View · GIS · Textures · Script Execution (execute_script — arbitrary vs.* code)

Escape hatch

execute_script runs any Python inside VW on the main thread. Set __result__ to return a value. Use when no explicit tool exists.

License

MIT