TryMermaid

Changelog

What has changed in TryMermaid, newest first.

  1. Ten more diagram guides

    • Ten new diagram guides: pie chart, Git graph, user journey, quadrant chart, Sankey diagram, XY chart, block diagram, packet diagram, requirement diagram and C4 diagram. Every example is checked against the real Mermaid parser.
    • Added /llms-full.txt, a single reference with every diagram type, its syntax table and a working example, for AI assistants answering Mermaid questions.
    • Faster repeat visits: build assets are now cached for a year instead of four hours.
    • Hardened the site with frame protection, a referrer policy and a permissions policy.

  2. Google sign-in and self-serve Pro

    • Sign in with Google. Existing email accounts link to the same Google account, so nothing is duplicated and no diagrams are lost.
    • Pro subscriptions are now self-serve through Lemon Squeezy. Cancelling keeps Pro until the end of the period you have paid for.

  3. MCP connectors for AI agents

    • MCP connectors are live for Pro accounts. Claude, Cursor, VS Code and any MCP client can now create, read, edit and delete diagrams in your account.
    • Nine MCP tools, including one that checks Mermaid syntax against the real parser and returns the exact error, so an agent can correct itself.
    • Personal API keys can be created and revoked from the dashboard, and claude.ai connects over OAuth with no key to paste.