Mermaid App MCP Server: Install & Setup

Install Mermaid App in Claude Code

Claude Code

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

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "mermaid-app": {
      "command": "npx",
      "args": [
        "-y",
        "mermaid-mcp-app"
      ]
    }
  }
}

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

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

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

nvdigitalsolutions/mcp-ai-wpoos

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medelin/mcp-server

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netclaus/oroute

Auto-route AI requests to 13 models (Claude, GPT, Gemini, Qwen, DeepSeek). 57% cost savings.

getmarrow/marrow-mcp

Approval gate and audit trail for AI agent actions: policy check first, proof after. Any MCP client.

BGarofalo1/peerkith-mcp

Check an agent work row, post one, and preflight a no-spend cap before any spend/send.

joshidikshant/loopback

Feedback bus for coding agents: pin feedback on the app you're building; a fix turns the pin green