Build a 3D website with Claude or ChatGPT (the 3dCMS MCP server)

3dCMS is a browser editor and an MCP server for real 3D websites: you build navigable 3D pages by hand or by chatting with Claude, ChatGPT or any other MCP client, and publish them as crawlable HTML at the same URL as the 3D view. It is free to start, needs no code, and connects to an AI assistant through one URL, https://3dcms.info/mcp.

MCP (the Model Context Protocol) is the open standard AI assistants use to call outside tools. The 3dCMS MCP server gives your assistant thirteen tools for your 3D sites: it can list and read your scenes, create new ones, add and move objects, pages, text, lights and links, look at what it built through a server-side render, critique the design, and publish to a public URL once you say yes. You describe the site; the assistant does the building; you open the result in the editor whenever you want to take over by hand.

The MCP server is the mirror image of the in-editor Assistant. Instead of chatting inside the editor on an API key, you chat in Claude, ChatGPT, or a coding tool such as Cursor or Claude Code (on the plan you already pay for), and the assistant builds and edits your saved scenes on your account. Anything it makes appears the next time you open that scene in the editor, and vice-versa.

Pick your client

• Claude (claude.ai, Claude Desktop): open 3dcms.info/claude, which takes you straight to 3dCMS in Claude's Connectors Directory, and click Connect. See Connect Claude to 3dCMS.
• ChatGPT: turn on developer mode and add the URL as a connector. See Connect ChatGPT to 3dCMS. This needs a paid ChatGPT plan.
• Gemini (the Gemini app): add 3dCMS as a custom app under Personal Intelligence. See Connect Gemini to 3dCMS.
• Cursor, Windsurf, VS Code, Claude Code, Codex CLI, Antigravity, Gemini CLI and any client that speaks streamable HTTP with OAuth: one url entry in the client's MCP config. See Other MCP clients.

Connected? Your first 3D website from a chat walks through a whole build in about ten minutes.

Two ways in

There are two routes, and the first one needs nothing installed:

Start with the hosted connector unless you specifically want generate_3d and generate_material, which only the local server offers (it lists them when a fal.ai key is set in its config). Either way, Connect Claude has the steps. (MCP stands for Model Context Protocol, the open standard Claude uses to connect to external tools.)

3dCMS is listed in the official MCP registry as info.3dcms/mcp, and directories that crawl that registry carry it too, so some clients can find it without you typing a URL at all. You can see the listings on Smithery and Glama, both of which show the same thirteen tools the hosted connector serves.

Want the one-page version to send to someone? 3dcms.info/ai has the connector URL, the setup steps for every client, the quick phrases, the thirteen tools and a FAQ on a single page. The same facts are published for assistants as /llms.txt (the short index) and /llms-full.txt (every tool with its description, the per-client steps and the FAQ in one fetch), so an assistant asked how to connect can read the answer itself.

What you get when you publish

A published 3dCMS site is not a canvas with nothing behind it. Every page serves a complete, semantic HTML document at the same URL as the 3D view, plus a plain-text /text/ twin, a sitemap and an llms.txt, so search engines and AI assistants read the same words your visitors see. See AIO: how AI assistants read a 3dCMS site.

What it costs

3dCMS is free to start, with no credit card: the free plan publishes real sites, and the connector works on it. The AI side runs on the Claude or ChatGPT plan you already have. The paid tiers raise the limits (sites, storage, server-side renders) and are listed under Membership & plan limits.