Diagrams as code,
drawn together.
Excaliwow is a hosted, real-time Excalidraw workspace with a developer platform. Create and edit diagrams from the terminal, the REST API, or your AI agent over MCP — or open the canvas and sketch with your team in real time, with live cursors, comments, and share links.
free during early access · no credit card
Developer platform
Control your diagrams from Claude, the terminal, or the API.
Excaliwow is a hosted platform, not just an editor. Create, render, and edit diagrams from a script, your terminal, or your AI agent, against the same canvas your team draws on.
- REST API
- A public /api/v1 to list, read, create, render, and edit diagrams over plain HTTP.
- CLI
- @excaliwow/cli on npm. Script your diagrams locally or in CI, with inline previews.
- MCP server
- @excaliwow/mcp on npm. Eight tools so Claude and other agents can build, regenerate, and tidy your diagrams.
# create a diagram from a spec, in your terminal
npx @excaliwow/cli diagrams create --spec architecture.json
# render an existing one to a PNG
npx @excaliwow/cli diagrams render <id> --format png -o out.png{
"mcpServers": {
"excaliwow": {
"command": "npx",
"args": ["-y", "@excaliwow/[email protected]"],
"env": { "EXCALIWOW_TOKEN": "excw_pat_…" }
}
}
}Built for teams who sketch to think.
Every feature earns its keep. No Kanban board bolted on, and no AI forced into your canvas. Connect Claude or your own tools through the developer platform when you want them, and the canvas stays yours when you don't.
- 01
Folders that feel like your brain
Organize diagrams the way your team already thinks. Nest, drag, star, and restore instantly.
- 02
Live cursors, live edits
See teammates move across the canvas. Concurrent edits merge cleanly, so two people drawing at once never clobber each other's work.
- 03
Comments pinned to the work
Drop a pin anywhere, start a thread. Resolve, reopen, and mention, with no Slack-to-Figma context hunt.
- 04
Share links that respect permissions
Public read-only URLs, password-gated previews, or invite-only access. One toggle, revocable any time.
Questions, answered.
- What is Excaliwow?
- Excaliwow is a hosted, real-time Excalidraw workspace with a developer platform. You can sketch on a shared canvas with your team — live cursors, comments, and share links — or create and edit the same diagrams programmatically from the command line, a REST API, or an AI agent over MCP.
- Is Excaliwow free?
- Yes. Excaliwow is free to start, with no credit card required during early access. You can create an account, draw, collaborate with your team, and use the full developer platform — the REST API, CLI, and MCP server — right away.
- What happens to my account after early access?
- Accounts created during early access are grandfathered in: you keep today's full feature set — real-time collaboration, sharing, and the REST, CLI, and MCP developer platform — free, even if the free plan gets narrower for people who join later. Signing up is instant. If bot signups become a problem, we may use automated, human-reviewed checks so grandfathering still reaches genuine users.
- How is Excaliwow different from Excalidraw?
- Excalidraw is the open-source drawing editor. Excaliwow is built on it and adds what teams need to work together over time: hosted accounts, persistent diagrams and folders, real-time multiplayer in a shared workspace, public share links, and a developer platform — a REST API, CLI, and MCP server — for automating diagrams.
- Does Excaliwow work with Claude and other AI agents?
- Yes. The @excaliwow/mcp server connects Excaliwow to Claude and other MCP clients through a small set of tools to create, read, render, and edit diagrams. Your agent builds and updates real diagrams in your account, which you can then open and refine in the browser.
More in the full FAQ.
Sketch with your team,
at the speed of talking.
Free while we’re in early access — and accounts you create now are grandfathered in, keeping today’s full feature set free as we grow. No sales calls, no credit card. Sketch with your team, or grab a token and drive your diagrams from code.