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build123d MCP

pzfreo/build123d-mcp

Gives Claude direct access to build123d's CAD operations so it can build, inspect, and iterate on 3D geometry instead of writing blind scripts. Execute code in a persistent session, render views as PNG or SVG, measure volume and clearance, export to STEP or STL, and load parts from bd_warehouse's fastener catalog. The workflow model is smart: use execute() for simple shapes, but for complex geometry with high face counts or threading, probe the API through the MCP then build in a standalone Python script and import the result to verify. Includes AST sandboxing and a restricted builtins layer so you can point it at LLM-generated code without immediately regretting it.

GitHub stars
143
tool
1
transport
STDIO
last updated
Oct 15, 2026
View on GitHub

Tools

1 tools

Public tool metadata for what this MCP can expose to an agent.

install_skillInstalls workflow guidance for an assistant, targeting agents-md, claude, cursor, or windsurf with skill modeling, drawing, or repair.

Installs workflow guidance for an assistant, targeting agents-md, claude, cursor, or windsurf with skill modeling, drawing, or repair.

No parameter schema in public metadata yet.

Sponsors

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Readme

build123d-mcp

PyPI version Downloads Python CI License: Apache 2.0 MCP Registry build123d-mcp MCP server

View the full README on GitHub

Details

Repository
github.com/pzfreo/build123d-mcp
Category
Design & Creative
Package
build123d-mcp
Transport
STDIO
Registry
MCP registry, active

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