effectustasi/autodesk-inventor-mcp

An MCP server that gives AI agents (Claude Code, Claude Desktop, Cursor, Codex…) a **live connection to Autodesk Inventor**.
Ask your agent things like *"which faces in this imported STEP are tiny slivers?"* or *"will Unwrap work on these 12 faces?"* and it reads the answer straight from the open model.
- **Zero dependencies:** one Python file, standard library only.
- **Live:** talks to the running Inventor session over COM (via Windows PowerShell). No export, no file round-trips.
- **Units you think in:** lengths in mm, areas in mm² (Inventor's internal unit is cm; the server converts).
- **Safe by default:** unwrap_try creates the feature, measures the result and deletes it again unless you pass keep: true.
Requirements
- Windows with Autodesk Inventor installed and **running** (developed against Inventor 2027)
- Python 3.9+
Install
Clone or download server.py, then register it with your agent.
**Claude Code**
**Claude Desktop / Cursor / any MCP client** (mcpServers config):
Tools
| Tool | What it does |
|---|---|
| status | Inventor version and open documents |
| model_info | Bodies (face/edge/vertex counts, bounding box in mm) and the feature tree of a part |
| smallest_faces | The N smallest faces with area and center. Finds import defects fast |
| face_neighbors | Faces that share an edge with a given face |
| unwrap_try | Tries an Unwrap on a face set and reports success, timing, result area and bounding box, the details the GUI doesn't show. Rolls back by default |
| script | Runs arbitrary PowerShell against Inventor's COM API, with $inv and helpers predefined |
Face indices are 1-based and stable for a given body as long as the model doesn't change.
⚠️ About the script tool
script executes **any PowerShell** your agent writes, with your user's permissions. That's what makes it powerful (anything in the Inventor API is reachable), and it's also why you should keep your agent's tool-approval prompts on for it. If you don't want it, delete its entry from TOOLS in server.py.
All other tools pass arguments as data, never as code.
Example (illustrative)
> **You:** The STEP I imported won't unwrap. What's wrong with it?
>
> **Agent:** *(calls smallest_faces)* Body 1 has 412 faces; the 6 smallest are under 0.01 mm², clustered around (12.4, -3.1, 40.0). *(calls face_neighbors on face 287)* They sit between two large B-spline faces, which is the classic sliver from a bad tessellation export. *(calls unwrap_try without them)* Unwrap succeeds in 1.8 s when those 6 faces are excluded.