Diagram
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How to make and share diagrams with Cursor

Cursor (the AI code editor) can draw architecture diagrams, flowcharts, and sequence diagrams, but on its own they end up as text in the chat or a file only you can open. Connect Diagram once and every diagram Cursor makes becomes a link you can share, which stays current as the diagram changes.

Set up Cursor, freeHow Diagram works

1. Connect Diagram to Cursor

Use the one-click Add to Cursor button on the setup page. Or add this to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "diagram": {
      "url": "https://diagram.la/mcp"
    }
  }
}

Sign in once: In Cursor Settings → MCP, click Connect (or Needs login) next to diagram: sign in with Google and click Allow.

2. Ask for a diagram

Open your repo and switch the chat to Agent, then describe what you want in plain words. For example:

Cursor draws it, keeps it in your repo’s diagrams/ folder, and gives you a link. You never have to mention Diagram again: it knows to use it.

3. Share the link

Paste it in Slack, a pull request, or a doc. Diagrams start private; add people to the project, share it with your team, or make one public. When it changes, ask Cursor to update it: the link stays the same and every version is kept.

Questions

Is Diagram free to use with Cursor?
Yes. Diagram is free for 5 projects, and there's nothing to install.
Who can see my diagrams?
Only you, until you share. Add people to a project, share it with your team through an org, or make a single diagram public so anyone with the link can open it.
What happens when the diagram changes?
Ask Cursor to update it. The new version lands at the same link, and every earlier version is kept.
Does Cursor need an API key?
No. Cursor signs in to Diagram with your Google account in the browser.

Diagrams in other tools