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Bitbybit CAD MCP

Bitbybit MCP servers: exact signatures of 2205 CAD functions for an agent and cloud geometry runs on CAD Cloud

  • 211 ★ on the repository
  • Last commit
  • MIT
MCP serverOfficial

Minimal access

Why this level

  • The main server only reads API descriptions and changes nothing, while the cloud server runs operations under a CAD Cloud key
All reasons and checks

bitbybit-dev/bitbybitAuthor:Bitbybit

Install

Manual install

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

The hosted free API lookup server.

Access and checks

How we review

Minimal accessThe tool runs nothing and makes no network calls.

  • The main server only reads API descriptions and changes nothing, while the cloud server runs operations under a CAD Cloud key

This is third-party code. Review the repository files before installing.

What it does

Bitbybit is a 3D and CAD algorithm platform for the browser and NodeJS with three geometry kernels and 2205 functions. A model does not remember that many names and invents plausible ones, so an agent gets the Bitbybit CAD MCP: it looks up the exact signature, defaults, return type and examples for the version you have installed. The server is read-only, free and needs no account. The address is `https://mcp.bitbybit.dev/mcp`, or run locally with `npx -y @bitbybit-dev/mcp` against the `@bitbybit-dev` packages in your project. A separate Bitbybit CAD Cloud MCP adds hands: the agent runs operations and pipelines on CAD Cloud, converts STEP to glTF and runs Pro algorithms, and that needs a CAD Cloud key. Each answer carries a tier: oss, platform-pro or cloud-pro.

Who it is for. Developers writing geometry with Three.js, Babylon.js or PlayCanvas who want the agent to stop inventing library calls.

Good fit when

  • An agent looks up a chamfer function in the API and gets the exact signature with an example instead of a guess
  • Before writing code you need to know where geometry should run: in the browser, on a server or in the cloud
  • An agent converts a STEP file to glTF through CAD Cloud and returns the result
  • You need to know whether a function is free: the answer names the tier oss, platform-pro or cloud-pro

Not a fit when

  • You need general CAD questions with no tie to the Bitbybit library: the server knows its own API
  • You have no CAD Cloud key: the cloud server does not run operations without it
  • You want a general Context7 instead of a dedicated server: context files cover such cases

Example request

Find the parametric cylinder function in Bitbybit, show the full signature with defaults and write an example for Three.js

MCP

Transport
http, stdio
Authentication
not required

Limitations

The main Bitbybit CAD MCP is read-only and free, while the cloud server needs a CAD Cloud key and platform plans. The hosted address `https://mcp.bitbybit.dev/mcp` suits HTTP clients, and the local `npx -y @bitbybit-dev/mcp` reads packages from your project. For assistants without MCP there are context files and Context7. The repository is a monorepo of algorithms and this card describes only the MCP servers. The license is MIT, and platform-pro and cloud-pro tier functions are paid.

How to disable. Remove the server from the client (`claude mcp remove bitbybit`). The CAD Cloud key is revoked in the platform account.

FAQ

What is the Bitbybit CAD MCP address?

`https://mcp.bitbybit.dev/mcp`, free and with no account. Locally the server runs with `npx -y @bitbybit-dev/mcp`.

How is CAD MCP different from CAD Cloud MCP?

The first only looks up the exact API of your version, the second also runs operations and pipelines, converts STEP to glTF and returns files, which needs a CAD Cloud key.

Which clients does it work with?

Claude Code, Codex, Cursor, VS Code, Gemini CLI, Windsurf, Zed, JetBrains IDEs, claude.ai, ChatGPT and the Claude API, all connecting to the same address.

What do the oss, platform-pro and cloud-pro tiers mean?

`oss` runs in the MIT packages anywhere, `platform-pro` inside the bitbybit.dev editors and `cloud-pro` only on CAD Cloud. The agent will not send you to a paid service for what the free packages do.

What if the assistant does not support MCP?

Attach the context files with the whole API as one file, or use Context7.

Discussion

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README in short

The text describes the Bitbybit platform and its packages, then a section on working with an agent: the free CAD MCP, the CAD Cloud MCP and context files. Usage paths follow: scripts, embeds and the REST API.

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