Napkin

Turns Excalidraw into a shared whiteboard where your AI agent can draw, annotate, and respond to your sketches. The MCP server exposes an intent-based API so agents can add nodes, connect them, apply layouts, and read canvas state without touching coordinates. One-way mode works with any MCP client. Add a webhook receiver and the agent wakes up when you draw something, reads the diff, and responds in your chat channel. Includes thought bubbles for agent suggestions, metadata tagging for semantic reasoning, batch execution via apply_intents, and trace_path for walking flows through diagrams. Useful when you want visual collaboration that doesn't collapse into describing wireframes back and forth in text.