mermaid mcp app for Claude Code

io.github.finfin/mermaid-mcp-app

MCP App that renders Mermaid diagrams as interactive UI in Claude, VS Code and other MCP clients

client:Claude Code transport:stdio runtime:npm

Install mermaid mcp app in Claude Code

run in your project directory

claude mcp add mermaid-mcp-app -- npx -y mermaid-mcp-app

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs