xby-mermaid-doc

Writing Mermaid diagrams is rarely about the logic of the chart itself. It is the syntax that trips you up: one mistyped keyword or a forgotten parameter and the whole diagram refuses to render, leaving you to scroll through official docs line by line. xby-mermaid-doc turns that hunt into a single query.

As an MCP plugin, its core capability is get_diagram_doc: you pass a diagram type name (flowchart, sequenceDiagram, gantt, classDiagram, architecture, and many more) and it returns the full documentation for that type out of the box. The catalog covers twenty-plus chart types spanning flowcharts, sequence diagrams, Gantt charts, C4 architecture diagrams, Sankey diagrams, radar charts, Zenuml interaction diagrams, and essentially the major Mermaid family. Pair it with set_xby_apikey for one-time persistent credential setup, and every subsequent call is frictionless.

If you regularly draw system architectures, database ER models, Kanban boards, or user-journey diagrams in Mermaid and do not want to keep flipping through the official site, this plugin works as your on-demand syntax reference: ask once, get a complete answer, zero context switching.