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A whiteboard your AI agent can draw on, live with your team

Heeey is a hosted MCP server on top of a multiplayer Excalidraw canvas. Ask Claude, Cursor or any MCP client for an architecture diagram and watch it appear on a board everyone can open, edit and keep.

Get your free API key Read the setup guide

Sign in with a magic link, then create a key under Settings → Integrations.

Terminal 
# Claude Code: one command, nothing to install or run locally
claude mcp add --transport http heeey https://www.heeey.click/api/mcp \
  --header "Authorization: Bearer hk_YOUR_KEY"

# then just ask
> Draw our checkout flow as a diagram on heeey

How does the Heeey MCP server work?

Your agent calls tools over Streamable HTTP; Heeey writes to the board and broadcasts every change to whoever has it open.

  1. 1

    Connect once

    Add the remote server URL and your API key to any MCP client. No Node process, no local canvas server.

  2. 2

    Describe, don't position

    create_diagram takes nodes and edges. Heeey sizes boxes, lays them out in layers and routes arrows around shapes.

  3. 3

    Share the link

    Every result includes the board URL. Teammates see shapes appear in real time and can keep editing by hand.

Which tools does the agent get?

Thirteen tools to read, draw and organize boards. Reads return a compact scene (labels, connections, rounded coordinates) to save context.

create_diagram · layout_board
Flowcharts, architectures, org charts and mind maps with automatic layout, or tidy up a messy board.
add_elements · delete_elements
Draw shapes, text and bound arrows from short specs with stable ids, then update them later.
get_board · list_boards · search_boards
Read what's on a board, or find one by any text written on its canvas.
create_board · rename_board · trash_board
Manage boards; trashed boards can be restored from the app.
list_folders · create_folder · move_board
Keep agent-made diagrams organized next to your own.
Plus a REST API
The same key works with /api/v1 for scripts and CI.

FAQ

Is the Heeey MCP server free?

Yes. Create an account with your email, generate an API key and connect your agent at no cost.

Which MCP clients does it work with?

Any client that supports remote MCP servers over Streamable HTTP with a custom header, including Claude Code and Cursor. The setup guide has copy-paste configs.

How is this different from a local Excalidraw MCP server?

Local servers draw on a canvas that lives on your machine. Heeey is hosted: boards persist in your account, have a shareable URL, and several people (and agents) can work on the same one at once.

Can I control what the agent is allowed to do?

Yes. API keys are scoped to read or read and write, and can be revoked at any time. See auth and permissions.

Do people need an account to see the diagram?

No. Anyone with the board link can open it, set to either "can edit" or "view only".

Give your agent a whiteboard

Sign in, create a key and your next diagram is one prompt away.

Get your free API key