cad-mcp-server
About
MCP server for AI-assisted STEP CAD inspection, geometry queries, PMI hints, and revision comparison
Details
- Author
- mattmohandiss
- Categories
- Design, Other
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Setup
Install cad-mcp-server in your MCP client (Claude Desktop, Cursor, Windsurf, and others).
Repository: https://github.com/mattmohandiss/cad-mcp-server
Follow the installation instructions in the repository README, then restart your MCP client.
Give your AI assistant the ability to inspect, measure, and compare 3D CAD models. Drop in a STEP file, ask engineering questions, get measured answers. Runs entirely on your machine — no cloud, no CAD license, no setup.
{ "mcpServers": { "cad": { "command": "npx", "args": ["-y", "cad-mcp-server"] } } }
Point your AI at any STEP file and ask questions like:
"Review this part before manufacturing. Check wall thickness, draft angles, and hole sizes. Flag anything that violates standard DFM rules."
- Zero setup.One command. No CAD software, licenses, Docker, or cloud API.
- Runs locally.Your STEP files never leave your machine.
- Deterministic answers.Backed by the Open CASCADE kernel, not LLM guessing.
- Read-only.Inspects geometry without modifying anything.
The AI assistant interprets the measurements. You get engineering answers, not raw numbers.
- "Review this part for injection molding: check draft angles with +Z pull, measure minimum wall thickness, identify undercuts."
- "Prepare a first-pass CNC plan: likely setups, drilling directions, features that drive cost."
- "Compare these two revisions and flag what needs rechecking before tooling."
- "Which holes are blind vs through? What's the depth of the blind hole?"
- "Find the thinnest wall section on this part. Is it above the 1.5mm minimum?"
- Node.js 24+
- STEP files (export from SolidWorks, FreeCAD, Fusion 360, CATIA, or any CAD system)
MIT. The bundled OCCT kernel uses LGPL-2.1. SeeTHIRD_PARTY_NOTICES.md.
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