Start here

About five minutes to a Fake health check (no CAD install required):

pip install pycadmcp
cadmcp doctor --backend fake
cadmcp install --client opencode --dry-run

For a live CAD session on Windows, use --backend solidworks with the CAD application already running.

Full quick start →

Two ways to work

• Fake backend

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  Develop and verify offline on Windows, macOS, or Linux. The full pytest suite runs against Fake — try the tools before attaching to a live CAD session.

• Live CAD backend

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  Attach to a running CAD application on Windows. COM runs only on a dedicated STA thread; business code never opens COM itself. SolidWorks 2025 is supported today.

Why cadmcp

• AI-assisted design

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  Your MCP client calls modeling tools step by step — intent in chat, geometry in CAD.

• STA by design

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  One process, one dedicated STA executor. No cross-thread COM objects.

• 134 tools · 9 toolsets

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  Sketches, features, assemblies, drawings, sheet metal, export — one MCP surface.

• Your MCP client

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  OpenCode, Cursor, and other MCP hosts. Skills ship as cadmcp://skill/....

Guides

• Getting started

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  Install, doctor, serve, and wire an MCP client.

• Tools

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  Capability matrix and the full tool inventory.

• Architecture

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  Protocol, STA, Fake vs live CAD — product constraints only.

• FAQ

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  Limits, licensing notes, and common questions.