MCP for 3D: how Claude and Cursor build scenes in ARClip

MCP (Model Context Protocol) is an open standard for connecting AI apps to outside tools. Claude, Cursor and other agents can work with any MCP server: read data, run actions and check the result.

ARClip has its own MCP server. Connect it, and an agent can build a 3D scene in your project: place objects, set up materials and light, add events and an interface, write scripts and check what came out. It all happens in the live editor: you see every change and can undo it like your own.

This is how it looks in the editor's built-in assistant. An agent connected over MCP works on the same scene, and you see each of its steps the same way.

How to connect

The server address:

https://editor.arclip.design/api/mcp/v1

claude.ai or Claude Desktop. Open Settings → Connectors, click Add custom connector, paste the address and sign in when asked.

Claude Code. Add the server with one command, then start Claude Code and run /mcp:

claude mcp add --transport http arclip https://editor.arclip.design/api/mcp/v1

Cursor. Add the server to .cursor/mcp.json:

{
  "mcpServers": {
    "arclip": { "url": "https://editor.arclip.design/api/mcp/v1" }
  }
}

The first time you connect, an ARClip page lists the permissions the app asks for: untick whatever you don't want to allow and press Allow. You can see and revoke access later in your account, under API & MCP.

What to ask for

• "Put a table here and four chairs around it" — the agent builds and places the objects while you watch.
• "Make the chairs the same blue as the logo" — it finds the colour and applies it to every chair.
• "Make the door open on tap" — it adds states and an event.
• "Find a ready-made armchair, and generate one if there isn't any" — it searches the library and Sketchfab first; generation uses AI credits.
• "Check the scene and show me a screenshot" — the agent checks its own work.

More ideas are in the docs: what an assistant does well.

A workshop with an agent

In a team project the agent is one more participant: its edits show up for everyone in real time and go into the edit history like yours. With the Timer and Voting plugins it can run a timed round, open a vote between options, read the result and carry on building with the winner.

An agent in a folder: the command line

If you work with a coding agent, install the arclip tool. It sets a folder up for Claude Code in one command, checks the scene, renders pictures and shows the draft on your phone through a QR code.

npm i -g arclip
arclip login
arclip link <project-id>

More on the CLI page and in the docs.

What each plan allows

On the free plan the agent can only read and check the project, up to 200 calls a month. Editing the scene and generating need a paid plan, and publishing the project needs one of the top plans. Generating images, video and 3D models uses AI credits.