build123d

A python CAD programming library

MAC (Multi-Agent CAD): A decoupled multi-agent framework for text-to-CAD generation via constrained test-time compute

Package manager for things. Start designing modular hardware! PartCAD is the standard for documenting manufacturable physical products (a.k.a. Digital Thread or TDP). It comes with a set of tools to maintain product information and to facilitate efficient and effective workflows at all product lifecycle phases, boosted by AI.

Using AI to generate 3D models

A CAD viewer capable of displaying (and editing) OCP models (CadQuery/Build123d) in a web browser.

A curated list of Build123d code and resources.

CAD CLI and MCP server for AI agents

Meshing library for nuclear workflows

Fast visual 3d diff for STL, OBJ, 3MF, and STEP files

MCP server for build123d to improve AI cognition when creating 3D CAD models

CAD/CAE Copilot — an AI-native CAD/CAE/CAX workbench for AI agents. Text-to-CAD, text-to-CAE, real build123d/OpenCASCADE geometry, editable parameters, stable topology pointers, deterministic critique, and MCP server tools.

Build123d in the browser!

Automatically generate a 3D printable case and magnetic carrycase for your custom split keyboard PCBs, from just the outline. Also generates cases for other PCBs.

Scripts to generate 3D-printable models that increase the height of Lenovo TrackPoints to make them usable on ergonomic keyboards.

Use agents to design and build high powered rockets

Skills and tools which enable coding agents like Codex to CAD

A Python package for parametric 3D modeling of keyboard keycaps using build123d.

MCP server for Shapr3D — AI-driven CAD modeling with build123d (OpenCascade) and STEP file exchange

Claude Code skill and diagnostics-first Build123d wrapper for LLM-driven CAD iteration.

A nicegui-based CAD customizer, editor, and viewer for OCP-based projects like build123d