agentcad
A CAD design tool for coding agents (free + open source)
What is agentcad?
Give your coding agent the ability to design real, manufacturable parts. Hand Claude Code or Codex a prompt, a sketch, or image. 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, and rendering it from every angle so your agent fixes its mistakes before you ever see them. You get back an interactive viewer plus STEP / STL / GLB files — ready to inspect, edit, or print.
From the website
Give your coding agent the ability to design real CAD output with build123d by default. Open-source MCP server and CLI with CadQuery compatibility, previews, STEP/STL/GLB export, validation, and version diffs.
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