kernelCAD-web
Open, agent-native CAD: edit code instead of clicking menus, built for humans and agents alike.
What it does and how it connects
kernelCAD is agent-native CAD: describe a mechanical part in ChatGPT, Claude, Codex, Cursor or the browser, and the brief becomes editable parametric CAD that can be inspected, revised and exported as STEP, STL or drawings. The design stays as .kcad.ts source with named features, editable dimensions and assembly structure, so agents can evaluate it, check constraints and clearances, revise the source and export files for an engineer to inspect. OpenCASCADE is the geometry kernel; kernelCAD supplies the agent-first modeling and review workflow.
The hosted MCP server runs at mcp.kernelcad.com with no local CAD install, and the local MCP server runs with one npx command. kernelCAD also runs as a connected app in ChatGPT and in Claude, with one account across clients so a model saved from one client opens at the same Studio share link. A sandbox mode keeps all file access inside one workspace directory and refuses outbound network at runtime, including telemetry.
The README is explicit that geometry checks are not material-strength or manufacturing certification, and that the output is CAD for review. The repository holds the reusable CAD runtime, CLI, MCP tools and headless renderer, while the hosted UI and commercial services are maintained separately.
Alternatives
Compare side by side- tau
A browser-based, multi-kernel CAD platform with a natural-language interface, rather than agent-native CAD kept as editable .kcad.ts source.
- cad-studio
A native macOS CAD studio where the user's own coding agent writes parametric build123d scripts, rather than agent-native CAD kept as editable .kcad.ts source.
- cad-cae-copilot
An MCP-capable CAD and CAE workbench that writes real build123d geometry and continues into simulation, rather than agent-native CAD kept as editable .kcad.ts source.
- voice-to-3d-print
AI-first parametric CAD from chat or voice through to 3D-print preparation, rather than agent-native CAD kept as editable .kcad.ts source.
- mnft
Text-to-CAD tooling in Elixir that emits build123d, OpenSCAD and SMLib geometry, rather than agent-native CAD kept as editable .kcad.ts source.
Sources
Not verified
- Real user voices: no real linked post read for this page.
- Related Error Index entries: no matching entry verified (the live error map has no kernelCAD entries).
- A named individual builder beyond the repository owner handle w1ne
- The repository holds the reusable CAD runtime, CLI, MCP tools and headless renderer; the hosted UI and commercial services are maintained separately, per the README.
Last verified November 6, 2026. Listings are informational. The evidence score measures public, verifiable evidence and is not an endorsement or a compatibility claim.