websocket_list_rooms
Enumerate active diagram/cursor/presence/global rooms
How to use it
websocket_list_rooms is exposed by the Excalidraw MCP MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), and the websocket_list_rooms tool becomes available to the model automatically. See the full listing for setup details and every tool this server provides.
Install Excalidraw MCP
uvx excalidraw-mcpOther tools in Excalidraw MCP (15)
Align elements (left, center, right, top, middle, bottom)
Create complex diagrams in one call
Create any type of Excalidraw element
Remove elements
Distribute elements evenly
Access scene, library, theme, or elements data
Group multiple elements
/ unlockelements - Lock/unlock elements
Search elements with filters
Ungroup element groups
Modify existing elements
Publish a synthetic event to a room (development use)
Throughput, rate-limit counters, and connection metrics
Active connections, rooms, and per-room subscriber counts
Liveness probe for the WebSocket server