Excalidraw MCP Diagramming

Create diagrams on a live Excalidraw canvas that renders in the browser and updates in real time. You are not generating a static file — you are painting onto a shared whiteboard through MCP tools. The canvas persists between calls, so what you put on it in one call is visible in the next screenshot.

When to Use

• The user asks to "create an excalidraw", "draw me a diagram", "make a flowchart", "visualise the system", or "diagram this architecture".
• The user wants an Excalidraw canvas output (not Draw.io / diagrams.net — use drawio-mcp-diagramming for that).
• The user wants to visualise an architecture, workflow, data flow, system design, mind map, or sequence diagram.
• The user asks to export a diagram to PNG, SVG, .excalidraw file, or a shareable URL.
• The user asks to update, change, or fix an existing Excalidraw diagram.

Required MCP Server

The excalidraw MCP server must be present in .vscode/mcp.json: