mermaid-mcp.md

Mermaid MCP Server

MCP server

from"hustcc"

647

hustcc/mcp-mermaid is a community server for generating Mermaid diagrams. It supports local stdio plus SSE or Streamable HTTP modes and returns generated diagram output; it does not register an MCP Apps ui:// view.

Not for: A live inline editor. The project generates and shares diagram output, while editing remains in Mermaid source or an external viewer.

Source and setup verified on 2026-11-03

Visualization

Mermaiddiagramsflowchartsmarkdown

View on GitHub

Quick facts

Maintainer: hustcc (community)
Transports: stdio, SSE and Streamable HTTP
Inline UI: No verified ui:// app
GitHub stars: 647 on 2026-11-03

What you can do

Generate Mermaid diagrams from source
Return rendered diagram results
Run locally or as an HTTP service

Requirements

Node.js for npx or global install
An MCP client

setup.md

# 1. Run over stdio

$npx -y mcp-mermaid

# Claude Desktop → claude_desktop_config.json

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

Always confirm the latest setup instructions with the maintainer before installing.

>Questions

Is Mermaid MCP Server an MCP App with inline UI?

No inline MCP App UI is claimed here. It is listed as a server or host because the verified source documents MCP tools or client support, not a ui:// app resource.

Where were these details checked?

Against the maintainer's README, source, or official documentation at https://github.com/hustcc/mcp-mermaid, plus the GitHub API where a repository is available.