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build123d-mcp
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build123d-mcp

Active·★ 125·Apache-2.0·Updated 2026-10-15

build123d-mcp is an MCP server that exposes build123d CAD operations as tools, allowing AI assistants to interactively build, inspect, and iterate on 3D geometry. It closes the feedback loop for AI writing build123d scripts, enabling them to create geometry, render views, query dimensions, and catch errors incrementally.

#CAD#3D Modeling#AI Tools#Geometry Inspection#Parametric Design#Design Automation
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Guides
#Python
#MCP
$ Install
$ pip install build123d-mcp
↗ Visit site★ GitHub
01

Features

01Run and manage build123d CAD sessions with persistent state and snapshots.
02Perform comprehensive geometry inspection, including measuring properties, clearance, cross-sections, and printability analysis.
03Generate interactive 3D views and 2D engineering drawings for visualization and documentation.
04Securely execute LLM-generated code within a sandboxed Python environment with robust security features.
05Access integrated CAD quick references, selector guides, drafting cookbooks, and a parametric part library.
02

Compatibility

Python
Runtime
Verified via docs
MCP (Model Context Protocol)
Protocol
Verified via docs
03

Quick start

1
$ pip install build123d-mcp
04

Use cases

↳AI-driven CAD design and iteration: Enable AI assistants to generate and refine 3D models interactively with real-time feedback.
↳Automated geometric verification and error detection: Detect design flaws such as voids, thin walls, or alignment issues in 3D models.
↳Printability analysis for additive manufacturing: Evaluate 3D models for FDM printability, identifying overhangs, thin walls, and tip-over risks.
↳Programmatic generation and inspection of engineering drawings: Automatically create and validate 2D engineering drawings from 3D models.
↳Integration of parametric part libraries: Search and load parametric parts (e.g., fasteners) from `bd_warehouse` into CAD designs.
05

Alternatives

⚡Top VS:
VSunity-api-mcp★67→VSgemini-mcp-tool★2.3k→VScodeinterpreter-api★3.8k→

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pzfreo /
build123d-mcp
↗

MCP server for build123d to improve AI cognition when creating 3D CAD models

125Apache-2.0
Last commit1w ago
StatusActive
CategoryCode Assistant
Links
Documentation↗Discussion↗Issues↗Releases↗
Cloud Infrastructure
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