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Let your AI agent build real 3D models in this open-source CAD app
SolidCraft is a free, open-source 3D design app: change one dimension and the whole model rebuilds. Connect an AI agent to it, and the agent builds the part itself instead of just telling you which button to click.
A CAD app (3D part-design program) with an editable build history: sketch, extrude, add fillets and holes — and change any step later.
When it helps
Useful if you need simple parts, enclosures, or assemblies and want an agent to hand you a finished 3D model. Not ready yet for complex mechanisms or production engineering drawings — the project is only three weeks old.
Pros
- Agent runs the same commands as the toolbar, not just advice
- No paid keys or cloud accounts — you only pay for the agent itself
- Runs as a desktop app, in browser, and without a GPU via software rendering
- 75 of 76 reference parts matched correctly in the authors' own tests
Cons
- Only three weeks old — very little track record yet
- Not suited for complex mechanics or finished engineering drawings
- Downloads aren't signed yet — you must manually confirm they can run
How to set it up — step by step
- 1Open your AI agent (e.g., Claude Code) inside your project folder.
- 2Send the agent the text from the block below — it will download SolidCraft for your system.
- 3Have it connect SolidCraft with claude mcp add solidcraft -- solidcraft-cli mcp.
- 4Ask it to build a simple part — e.g., a box with a lid and a couple of mounting holes.
- 5Check the finished model in the screenshot and try changing one dimension.
Text for your agent
Copy this and send it to your agent — Claude Code, Codex, any of them:
Install SolidCraft from https://github.com/tangency-labs/solidcraft (download the build for my system or build it from source per the README), connect it through MCP with claude mcp add solidcraft -- solidcraft-cli mcp, build a simple part — for example a rectangular enclosure with a lid and a couple of mounting holes — and show me a screenshot of the finished model.
Installs like an ordinary program on Windows, macOS or Linux, or opens straight in the browser with nothing to install. The authors give no numbers for graphics card or memory: it uses the GPU for images and falls back to a software renderer without one, so it also starts on a weaker laptop.
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