Show HN: An OSS text to CAD MCP and API

Category: devtools

Tags: cad, text-to-cad, mcp, opencascade, rust, ai-integration

Score: 7.5/10 (Innovation: 7, Technical: 8, Documentation: 8, Utility: 7)

scratchcad is a Rust-based solid modelling API built on OpenCASCADE that lets AI assistants generate CAD models via Rhai scripts, with an MCP server and live editor. It bridges LLMs and parametric CAD, enabling text-to-CAD workflows with exact B-rep exports to formats like STEP and STL.

Target audience: mechanical engineers, CAD developers, AI tool builders, hobbyist 3D modellers

Repository: https://github.com/Zesuperaker/scratchcad · Rust · Apache-2.0 · 4 stars

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