Shared visual canvas (Excalidraw) for collaborative whiteboarding between AI agents and humans.
io.github.sshwarts/napkin
https://github.com/sshwarts/napkin
STDIO
No auth required
How models use it and what it is built for.
Shared visual canvas (Excalidraw) for collaborative whiteboarding between AI agents and humans.
Hosted endpoint — paste into any MCP client.
Configuration this server reads at startup.
Anthropic API key — enables vision features (describe_elements). Optional.
Where to find authoritative docs and source for napkin.
MCP Playground runs 10,000+ hosted MCP servers — GitHub, Linear, Notion, Stripe, Sentry and more — across Claude, GPT, Gemini, DeepSeek and 30+ AI models. Compare model answers side-by-side, save agent presets, share runs. Zero install.
Open Agent Studio