SolidCraft

SolidCraft is an open-source parametric 3D CAD application that builds solids from constrained sketches.

SolidCraft is an open-source parametric 3D CAD application written in pure Rust. Users can sketch on a plane, constrain and dimension the sketch, and turn profiles into solids with features on a timeline. Changing a parameter causes the entire timeline to rebuild. It runs as a desktop app for Windows and Linux, a web app in the browser via WebAssembly, a headless CLI for running command scripts, measuring, and exporting, and an MCP server for AI agents. Every action is a command with JSON parameters, enabling full scripting and testing parity across the user interface, CLI, and MCP. The application currently supports sketching, solid modelling, parameters, components with joints, sheet metal, and a plastic-enclosure subset, while surfaces, drawings, CAM, and simulation are deferred. It is licensed under MIT OR Apache-2.0.

SolidCraft at a glance

Best for: Software engineer, Designer
Runs on: Web, Windows, Linux, CLI
Pricing: Free and open-source under MIT OR Apache-2.0 license.
Released: October 2026
Category: AI coding tool
Website: bherbruck.github.io/solidcraft

Key features

Sketch on a plane with constraints and dimensions
Turn profiles into solids with features on a timeline
Rebuild the timeline automatically when parameters change
Run as a desktop application for Windows and Linux
Run as a web application in the browser
Execute headless commands and exports via CLI
Model using AI agents via an MCP server
Control all actions using JSON parameters

Use it for

Design 3D models using parametric sketches
Automate modelling tasks using a headless CLI
Drive CAD models programmatically with AI agents
Build and test designs via JSON command parameters

Alternatives to SolidCraft

SolveCraft — A command-driven architecture supports scripting, headless CLI use, and AI agents.
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Lobole — Drives the GUI, Python scripts, and AI agents through a single unified command layer.
Solid Glass — Pre-built glass UI components tailored for AI status and workflows
Popkern — It uses research-class CAGD algorithms and runs in your browser or locally.
Hackerscad — Combines code-based modeling with direct mouse editing and an AI agent MCP server.
CADAM — Integrates directly into SolidWorks, Onshape, and Fusion.
AMNI-SCIENT — Runs parametric CAD, finite element analysis, and CFD simulations directly in the browser.
Blender AI MCP Addon — It provides 21 built-in scene tools and a visual studio workspace for AI agents.
Lightcraft — It is a native, high-performance photo darkroom driven end to end by AI agents.
OpenSandbox — Provides isolated environments with multi-language SDKs and lifecycle management.

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