agentcad
A CAD design tool for coding agents (free + open source)
agentcad launched on June 9, 2026 with 110 votes, #337 of 22,647 launches that month and more than 95% of that year's launches.
What it does
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.
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.
An open-source MCP server and CLI that lets your coding agent design, render, and export real CAD output. On CADGenBench, GPT-5 Nano scored 48% higher with agentcad, produced 2.5 times as many valid outputs, and cost 21.8% less to run. Paste this prompt into Claude Code , Cursor , or any coding agent. It sets everything up and designs your first model — no manual install: Create a Python 3.12 virtual environment, then: pip install agentcad[mcp] agentcad skill install agentcad --help agentcad init --name phone-stand Read the --help output — it's your operational briefing. Use the default build123d runtime unless I explicitly ask for CadQuery compatibility. Then design me a phone stand: a…from agentcad.dev
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