agentcad: Open-source CAD tool that lets AI coding agents design and self-verify manufacturable 3D parts
By
James Dillard
Recycled flavour. You've tasted this bagel before.
Summary
agentcad is a free, open-source CAD design tool that enables coding agents (like Claude Code or Codex) to create real, manufacturable 3D parts. The agent writes build123d or CadQuery scripts, and agentcad automatically checks the work for broken code, verifies watertight geometry and dimensional accuracy, and renders the model from all angles. The agent can fix mistakes autonomously before human review. Output includes an interactive viewer plus STEP, STL, and GLB files ready for inspection, editing, or 3D printing.
Key quotes
· 3 pulledGive your coding agent the ability to design real, manufacturable parts.
It writes build123d or CadQuery scripts, then runs agentcad to check its own work, catching broken code, confirming the geometry is watertight and dimensionally correct.
You get back an interactive viewer plus STEP / STL / GLB files — ready to inspect, edit, or print.
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