# SolidCraft: open-source parametric CAD in pure Rust, with an MCP server so AI agents can model parts

Canonical: https://theagenticweekly.com/news/solidcraft-open-source-rust-cad-mcp-server · Evidence: Reported · First seen: 2026-10-26 12:27 UTC · Source published: 2026-10-07 18:57 UTC · Brief published: 2026-10-26 14:34 UTC · Updated: 2026-10-26 14:34 UTC · Author: Agentic Weekly

> SolidCraft is an open-source parametric 3D CAD application written in Rust that runs on the desktop and in the browser, and its solidcraft-cli mcp command is a Model Context Protocol server that lets AI agents such as Claude Code build models; its README calls it early but usable for simple parts.

## What changed

- SolidCraft is a parametric 3D CAD application written in Rust: sketches with constraints, then features such as extrude, revolve, sweep, loft, fillet, shell, holes, threads and patterns on an editable timeline that rebuilds when a dimension changes.
- The README says the desktop app, browser app, headless CLI and MCP server all run the same commands, with downloads for Windows, macOS and Linux (AppImage and Snap) and a browser version that needs no install.
- For AI agents, solidcraft-cli mcp is an MCP server: headless it runs its own design session, or with --connect it drives the running app so you can watch. The README gives a Claude Code setup line.
- The README lists STEP, IGES, 3MF, STL, OBJ and glTF import and export where supported, plus assemblies, sheet metal and URDF export, and says 75 of 76 public reference parts match their expected geometry.
- The repository was created on 2026-10-07 (UTC) and had about 10,700 GitHub stars when we checked; the latest stable release was v0.23.1, published 2026-10-26 (UTC).

## In the source's words

> "Early but usable for simple parts"
> (SolidCraft README, https://github.com/tangency-labs/solidcraft)

> "Headless it runs its own design session, or with --connect it drives the running app so you can watch."
> (SolidCraft README, AI agents (MCP) section, https://github.com/tangency-labs/solidcraft)

## What we have not verified

- We did not install or run SolidCraft or its MCP server; every capability here is as the README states it.
- The 75-of-76 reference-part figure is the project's own test result, not ours.
- The README says the licence is MIT OR Apache-2.0 at the user's option; we did not review the licence files or third-party attributions.
- The README says the downloads are not code-signed yet, so Windows and macOS show security warnings on first launch.

## Timeline

- Source published: 2026-10-07 18:57 UTC
- First seen by our watcher: 2026-10-26 12:27 UTC (via GitHub new repos: topic mcp (discovery sweep); primary source is the project's GitHub repository), 18.7 days after the source's timestamp
- Brief published: 2026-10-26 14:34 UTC

## Sources

- [tangency-labs/solidcraft README (GitHub)](https://github.com/tangency-labs/solidcraft) (primary source) (fetched 2026-10-26)
- [SolidCraft v0.23.1 release (GitHub)](https://github.com/tangency-labs/solidcraft/releases/tag/v0.23.1) (fetched 2026-10-26)
- [SolidCraft website](https://solidcraft.io) (fetched 2026-10-26)

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## How to cite

Agentic Weekly, "SolidCraft: open-source parametric CAD in pure Rust, with an MCP server so AI agents can model parts", published 2026-10-26 14:34 UTC, https://theagenticweekly.com/news/solidcraft-open-source-rust-cad-mcp-server