15 tools that work with Mermaid: 6 MCP servers, 9 Agent Skills and 0 Claude Code plugins. 1 of the remote servers answered our live check, 0 worked without an API key, and 2 come from an official or verified publisher. Ranked by GitHub stars plus official, live and free-to-try signals.
Most common uses: Design tools (Figma, Canva...) (7), Frontend, UI components & design-to-code (3), Code & dependency scanning (2), Unusual, one-of-a-kind tools (1).
| Tool | Stars | Last update | License | |
|---|---|---|---|---|
| mermaid-diagrams Comprehensive guide for creating software diagrams using Mermaid syntax. Use when users need to create, visualize, or document software through diagra SkillInstall · skills CLI | 33,495 | MIT | ||
| mermaid-diagram Generate Mermaid diagrams from user requirements. Supports flowcharts, sequence diagrams, class diagrams, ER diagrams, Gantt charts, and 18 more diagr SkillInstall · skills CLI | 19,162 | MIT | ||
| crypto-protocol-diagram Extracts protocol message flow from source code, RFCs, academic papers, pseudocode, informal prose, ProVerif (.pv), or Tamarin (.spthy) models and gen SkillInstall · skills CLI | 8,179 | CC-BY-SA-4.0 | ||
| mermaid-to-proverif Translates Mermaid sequenceDiagrams describing cryptographic protocols into ProVerif formal verification models (.pv files). Use when generating a Pro SkillInstall · skills CLI | 8,179 | CC-BY-SA-4.0 | ||
| mermaid-studio Expert Mermaid diagram creation, validation, and rendering with dual-engine output (SVG/PNG/ASCII). Supports all 20+ diagram types including C4 archit SkillInstall · skills CLI | 7,167 | — | ||
| markdown-mermaid-writing Comprehensive markdown and Mermaid diagram writing skill that establishes text-based diagrams as the DEFAULT documentation standard. Use this skill wh SkillInstall · skills CLI | 3,816 | Apache-2.0 | ||
| excalidraw-diagram Generate Excalidraw diagrams from text content. Supports three output modes - Obsidian (.md), Standard (.excalidraw), and Animated (.excalidraw with a SkillInstall · skills CLI | 3,682 | MIT | ||
| Line9 Render Mermaid with Line9 layout in your assistant. MCP serverVerified domain · line9.aiRemote● LiveAPI key needed | — | — | ||
| matplotlib This skill should be used when the user invokes "/matplotlib" to plot data from the current context using matplotlib (via uv) and output the resulting SkillInstall · skills CLI | 149 | — | ||
| story-track Writes a point-and-click adventure's story and puzzles so they can be built and tested. Interviews the operator and drafts three story cores, then wri SkillInstall · skills CLI | 106 | — | ||
| com.mermaidchart/mermaid-mcp MCP server for Mermaid diagram validation and rendering MCP serverVerified domain · mermaidchart.comRemoteSign-in needed | — | — | ||
| diagonaldiagrams Diagrams and charts for agents: Mermaid or a spec in, an audited SVG out. MCP serverGitHub-verified authorLocal · PyPI | 0 | MIT | ||
| io.github.tci-nebula/mermaid-render-mcp Renders Mermaid diagram syntax to PNG or SVG images for LLM clients MCP serverGitHub-verified authorLocal · npm | 0 | MIT | ||
| Mermaid Online MCP — Share Links & Source Mermaid Online MCP: encode share links and recover Mermaid diagram source locally. MCP serverGitHub-verified authorLocal · npm | 0 | MIT | ||
| Vaults Diagram Tools Mermaid to assets. Source code to maps. MCP for agents. MCP serverGitHub-verified authorLocal · npm | 0 | MIT |