Guide · Fusion 360
How to connect Claude to Fusion 360
Prompt4CAD connects Claude's AI to your Fusion 360: you describe the part in natural language and it is built in your own CAD, with your license, through the Fusion 360 Python API (adsk). No copy-pasting macros by hand. Fusion 360 exposes no COM, so Prompt4CAD uses a native add-in installed with a single command that starts automatically with Fusion.
Connect Claude to Fusion 360 in 3 steps
- Open prompt4cad.com and pick Fusion 360 in the CAD selector. The site shows your pairing code.
- Paste one command into PowerShell:
irm https://prompt4cad.com/install-fusion/YOURCODE | iex. It installs the Fusion add-in preconfigured with your code. - Open or restart Fusion 360: the add-in starts by itself. Type your prompt on the site and the part is built in your Fusion, with the STL in the 3D viewer.
How to use Fusion 360 with AI
With the connector active you get two engines on top of Fusion 360:
- Command engine (no AI) — instant and deterministic: cubes, boxes, cylinders, cones, tubes, tori, polygonal prisms and pyramids, stars, ellipses and DIN/ISO standard hardware (nuts, bolts, washers, metric clearance holes). See the command manual.
- AI engine — free-form geometry: the AI writes a native macro for the Fusion 360 Python API (adsk) and the connector runs it on your machine. If the macro fails, the error goes back to the AI and it fixes itself (up to 3 attempts). You can refine the result by describing what is wrong, with a snapshot of the viewer as context.
You review the result in a 3D viewer with drawing views (front, top, side) and export to STL, STEP, OBJ, PLY or 3MF.
FAQ
Do I need an API key or to pay anything?
The command engine is free and uses no AI. The AI engine runs on Prompt4CAD's server infrastructure; you only need your Fusion 360 license.
Is it safe? What does the add-in install?
A lightweight Python script that polls prompt4cad.com and only picks up jobs created with your pairing code. The code is open — inspect it before installing.
Does it work with my Fusion 360 version?
Any current desktop Fusion 360 on Windows. The add-in is in beta.
What if I don't have Fusion 360?
Use the AI-only mode: the part is generated on the server with FreeCAD and you download the STL with nothing installed. Or pick another CAD: How to connect Claude to SolidWorks — use SolidWorks with AI · How to connect Claude to Inventor — use Inventor with AI · How to connect Claude to AutoCAD — use AutoCAD with AI