How do I install Bitbybit CAD MCP?

Copy the http config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does Bitbybit CAD MCP need an API key?

No required environment variable is listed on this record.

What transport does Bitbybit CAD MCP use?

Bitbybit CAD MCP is reached over HTTP.

When was Bitbybit CAD MCP last checked?

Last checked 2026-11-08. Bitbybit 3D parametric CAD API, version-exact, for coding agents: search, describe, examples, guide

Bitbybit CAD MCP server

Power your agent

Add this server

The publisher's own URL. Not a PlugMCP endpoint.

Add to Cursor Add in Claude Add to VS Code Run on PlugMCP

Host a copy with our keys and logs.

Server URL

https://mcp.bitbybit.dev/mcp

The Claude button above opens Claude with the name and URL filled in. You still confirm it there.

shClaude Code

1claude mcp add --transport http dev.bitbybit-cad https://mcp.bitbybit.dev/mcp

Run in a terminal.

jsonClaude Desktop

1{2  "mcpServers": {3    "dev.bitbybit-cad": {4      "command": "npx",5      "args": [6        "-y",7        "mcp-remote",8        "https://mcp.bitbybit.dev/mcp"9      ]10    }11  }12}

claude_desktop_config.json

Remote · HTTPPublisher installStep-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

Server facts

Live

Transport: http
Version: 1.6.1
Last checked

7 tools

Tools

tools/listVoice mode preview

Tool	What it does

Bitbybit Monorepo

Open-source 3D CAD algorithms for the web - MIT licensed. This monorepo contains all Bitbybit NPM packages plus example applications.

Written to be used by people and by AI coding agents alike: every function is published in a form an agent can look up while it writes - see Build It With an AI Agent.

License

Source code in packages/, languages/, and examples/ is MIT licensed. Documentation text in docs/ is CC BY 4.0. Logos, trademarks, and media assets are not open-source - see CONTENT-LICENSE.md for details.

FULL PLATFORM AT BITBYBIT.DEV

LEARN BITBYBIT

TYPESCRIPT API REFERENCE

Quick Start

Scaffold a fully-configured 3D CAD project in seconds:

npx @bitbybit-dev/create-app my-project

The CLI first asks you to pick an app type:

Frontend - Browser-based 3D/CAD app. Choose a game engine (Three.js, Babylon.js, or PlayCanvas) and OCCT architecture (32-bit, 64-bit, or 64-bit MT). You get a Vite + TypeScript project with all three CAD kernels (OCCT, JSCAD, Manifold) pre-configured.
CAD Cloud - Full-stack project with server-side CAD via our CAD Cloud API. Choose a backend template (Hono + SDK, Hono + REST, Node.js + SDK, Node.js + REST, or .NET + REST). You get a React + Three.js frontend that proxies requests through your backend - your API key never leaves the server.

cd my-project
npm install
npm run dev

Build It With an AI Agent

Bitbybit has 2017 functions across three CAD kernels - more than any model remembers, so an agent working from memory invents plausible names that do not exist. Give it the Bitbybit CAD MCP instead and it looks up the exact signature, defaults, return type and examples for the version you have installed. It is free and needs no account:

claude mcp add --transport http bitbybit https://mcp.bitbybit.dev/mcp

Codex, Cursor, VS Code, Gemini CLI, Windsurf, Zed, the JetBrains IDEs, claude.ai, ChatGPT and the Claude API connect to the same endpoint, and npx -y @bitbybit-dev/mcp runs it locally against the @bitbybit-dev packages in your project - every configuration is here.

	What it gives an agent	Cost
Bitbybit CAD MCP	The exact API of the version you use: search, full signatures with defaults, examples, and the guide on where geometry should run. Read-only.	Free, no account
Bitbybit CAD Cloud MCP	Hands as well as knowledge: the agent runs operations and pipelines on CAD Cloud, converts STEP to glTF, runs Pro algorithms, and returns the files.	A CAD Cloud key
Context files and Context7	The whole API as one file to attach, for assistants that cannot speak MCP.	Free

Every answer carries a tier - oss runs in these MIT packages anywhere, platform-pro inside the bitbybit.dev editors, cloud-pro only on CAD Cloud - so an agent never sends you to a paid service for something the free packages already do. The AI section of the documentation covers all of it.

Support the Mission

⭐ Subscribe - Silver or Gold plan | Get API Key for CAD Cloud

Check out 3D Bits app for Shopify - interactive 3D product configurators for e-commerce.

Your subscription directly funds continued open-source development of these packages.

Important Topics

Topic	Link
Getting Started	https://learn.bitbybit.dev/learn/getting-started/overview
TypeScript API Reference	https://docs.bitbybit.dev
API Reference - OCCT kernel	https://docs.bitbybit.dev/classes/Bit.OCCT
API Reference - JSCAD kernel	https://docs.bitbybit.dev/classes/Bit.JSCAD
API Reference - Manifold kernel	https://docs.bitbybit.dev/classes/Bit.Manifold
NPM Packages Intro	https://learn.bitbybit.dev/learn/npm-packages/intro
Integrate with Three.js	https://learn.bitbybit.dev/learn/npm-packages/threejs/start-with-three-js
Integrate with BabylonJS	https://learn.bitbybit.dev/learn/npm-packages/babylonjs/start-with-babylon-js
Integrate with PlayCanvas	https://learn.bitbybit.dev/learn/npm-packages/playcanvas/start-with-playcanvas
CAD Cloud API	https://learn.bitbybit.dev/api/cloud-api
Script Runners	https://learn.bitbybit.dev/learn/runners/intro
3D Bits for Shopify	https://learn.bitbybit.dev/learn/3d-bits/intro
AI Coding Agents - Overview	https://learn.bitbybit.dev/learn/using-ai-with-bitbybit/intro

How Bitbybit Fits Into Your Stack

The diagram shows every way a website can reach Bitbybit geometry, and where the NPM packages below sit among them:

NPM packages - this repository. The kernels compile to WebAssembly and run in your users' browsers or in your own Node process, inside your build, MIT licensed and free.
Script runners - one script file loads the same engine and executes scripts exported from the visual editors, with no build step.
Iframe embeds - a project published on bitbybit.dev dropped straight into a page.
CAD Cloud REST API - your backend sends the work to our managed kernels and gets results back as files, for the Pro algorithms and for compute you would rather not host.
AI agents - the MCP servers above, writing code against any of these paths or running the geometry themselves.

The full walkthrough of the diagram is on learn.bitbybit.dev.

NPM Packages

Package	Description
@bitbybit-dev/babylonjs	BabylonJS engine integration for drawing CAD geometry
@bitbybit-dev/threejs	Three.js engine integration for drawing CAD geometry
@bitbybit-dev/playcanvas	PlayCanvas engine integration for drawing CAD geometry
@bitbybit-dev/core	Core assembly layer combining all CAD kernels
@bitbybit-dev/occt	OpenCascade CAD kernel (works in Node.js & browser)
@bitbybit-dev/occt-worker	OCCT via WebWorker (non-blocking, browser only)
@bitbybit-dev/manifold	Manifold fast mesh booleans (works in Node.js & browser)
@bitbybit-dev/manifold-worker	Manifold via WebWorker (non-blocking, browser only)
@bitbybit-dev/jscad	JSCAD solid modeling (works in Node.js & browser)
@bitbybit-dev/jscad-worker	JSCAD via WebWorker (non-blocking, browser only)
@bitbybit-dev/ifc	IFC building models read, written and authored in TypeScript (works in Node.js & browser)
@bitbybit-dev/ifc-worker	IFC via WebWorker (non-blocking, browser only)
@bitbybit-dev/base

NPM Package Architecture

Example Applications

All examples live in the examples/ directory of this monorepo:

App	Engine	Source Code
Hex Shell	Three.js	GitHub
Cup Configurator	Three.js	GitHub
Hex House Concept	Three.js	GitHub
Starter Template	BabylonJS	GitHub
Starter Template	Three.js	GitHub
Starter Template	PlayCanvas	GitHub
Terrace Furniture	BabylonJS	Closed source

Bitbybit Platform

Beyond these open-source NPM packages, the Bitbybit platform includes:

Visual Programming Editors - Rete & Blockly drag-and-drop 3D modeling, plus a Monaco TypeScript editor with full IntelliSense
CAD Cloud API - Build full pipelines that compose all Bitbybit algorithms, where each step can reference outputs of previous steps. Supports parametric model generation, STEP-to-glTF conversion, and complex CAD workflows via HTTP. TypeScript SDK available.
Bitbybit Studio - A growing visual dashboard where API Key users can generate models, convert files, build pipelines with a GUI, inspect tasks, and preview 3D results
3D Bits for Shopify - Interactive 3D product configurators for your Shopify store. Documentation.
Script Runners - Execute Rete/Blockly/TypeScript scripts directly on your website without writing code
Built for AI Coding Agents - The free Bitbybit CAD MCP gives Claude Code, Codex, Cursor, VS Code, claude.ai and ChatGPT the exact API of the version you use; the Bitbybit CAD Cloud MCP lets an agent run geometry on CAD Cloud with a key. Context files cover assistants without MCP.
Business & Enterprise - We help businesses and enterprises develop custom applications and spin up optimized CAD tenant workflows on our managed servers

Community

Watch the Introduction

Matas walks through the platform and the ideas behind it:

Development Setup

Contributions

If you're interested in contributing please check our Contribution guidelines & code of conduct

First Time Setup and Testing

For first-time developers working on this project, follow these steps to set up the development environment and run all unit tests:

Prerequisites

Node.js 22 or newer (.tool-versions pins 22; the nightly workflow also runs 24)
pnpm 11 (see step 2 below)
Git

Quick Start

Clone the repository:

git clone https://github.com/bitbybit-dev/bitbybit.git
cd bitbybit

Install pnpm 11 once (the packages are one pnpm workspace; the packageManager field pins the exact version):
```
npm install -g pnpm@11
```
Run the complete first-time setup (this will install all dependencies, build all packages, and run all unit tests):
```
npm run first-time-setup
```

Available Commands

npm run first-time-setup - Complete setup for new developers (installs dependencies, builds packages, runs tests)
npm run setup - Install dependencies and build all packages without running tests
npm run setup-and-test - Install dependencies, build packages, and run all unit tests
npm run test - Run all unit tests (requires packages to be built first)
npm run test:report - One report over every suite's last results (files, tests, failures, skipped, coverage); written to the job summary on GitHub Actions
npm run ci-packages - Install dependencies for all packages (one pnpm install --frozen-lockfile for the workspace)
npm run refresh-lockfile - Rewrite pnpm-lock.yaml after a dependency change, without touching node_modules
npm run build-packages - Build and stage all packages (tsc -b over generated project references, run by pnpm in dependency order)
npm run rebuild-all-packages - Empty every dist, then build all packages
npm run gen:references - Regenerate the TypeScript project references from the package manifests after a dependency change
npm run check:references - Fail if the project references and the manifests disagree (the first step of npm test)
npm run lint - ESLint over the repository, green by the committed suppression baseline; a new finding fails
npm run typecheck:strict - Every package's typecheck under the full strict set
npm run check:strict-baselines - Fail if any package has grown a strict baseline; every package is fully strict, so the check holds the line at zero
npm run api:check - Fail if any package's public API surface differs from the committed report in its etc/ folder
npm run api:update - Regenerate those API reports after a deliberate change to the public surface
npm run check:tarballs - Pack every built package and install the tarballs together into an empty project, as a user would

Running Individual Package Tests

You can also run tests for individual packages:

npm run test-base - Test base package
npm run test-occt - Test OCCT package
npm run test-core - Test core package
npm run test-jscad - Test JSCAD package
npm run test-manifold - Test Manifold package
npm run test-threejs - Test ThreeJS package
npm run test-playcanvas - Test PlayCanvas package
npm run test-babylonjs - Test BabylonJS package

Troubleshooting

If you encounter issues during setup:

Make sure you have Node.js 22+ installed (node --version)
Clear the pnpm store: pnpm store prune
Delete node_modules at the root and under packages/dev/*, then run pnpm install

Major Dependencies

BabylonJS, ThreeJS, PlayCanvas, OpenCascade, Manifold, JSCAD, and Verbnurbs - the last of these deprecated, no longer maintained upstream, and removed in the next major version.

search_api	Find Bitbybit API members (methods, namespaces, cloud operations) by keywords, for example "box solid" or "fillet edges". Returns dotted paths with a one-line summary, the tier (oss on npm, platform-pro only at bitbybit.dev, cloud-pro only on CAD Cloud) and the engines each is published for. Call de
describe	The exact contract of one member by dotted path, for example occt.shapes.solid.createBox: signature, every parameter with its type, default and range, the return type, the documentation, examples and where it runs. Answers are for the API version the server holds. It also describes the types a membe
list_namespace	The members one level below a namespace path, for example occt.shapes, each with its kind and summary. Without a path, the top-level namespaces. Use it to discover what exists before searching for details.
get_examples	Working TypeScript examples for a member path, for a namespace, or for a topic given as keywords. Each example names the member it belongs to and links its reference page. Examples are written for the API version the server holds.
get_guide	Sections of the public guides: building with Bitbybit (what runs in the browser, on a server, on a lightweight backend, and what needs CAD Cloud), writing geometry with the kernels (which kernel to use, the order to build a part in, choosing edges, checking and exporting shapes), writing design docu
search	Searches the Bitbybit API documentation and returns a list of results with id, title and url. Each id is a dotted API path that fetch accepts.
fetch	Fetches the full documentation of one Bitbybit API member by id (a dotted path returned by search) as text, with its title, url and metadata.

Add this server

Host a copy with our keys and logs.

Server facts

Tools

Questions

How do I install Bitbybit CAD MCP?

Does Bitbybit CAD MCP need an API key?

What transport does Bitbybit CAD MCP use?

When was Bitbybit CAD MCP last checked?

Documentation

Bitbybit Monorepo

License

FULL PLATFORM AT BITBYBIT.DEV

LEARN BITBYBIT

TYPESCRIPT API REFERENCE

Quick Start

Build It With an AI Agent

Support the Mission

Important Topics

How Bitbybit Fits Into Your Stack

NPM Packages

NPM Package Architecture

Example Applications

Bitbybit Platform

Community

Watch the Introduction

Development Setup

Contributions

First Time Setup and Testing

Prerequisites

Quick Start

Available Commands

Running Individual Package Tests

Troubleshooting

Major Dependencies