What does Mermaid MCP Server do?
It provides three MCP tools: `validate_mermaid` checks syntax, `render_mermaid_svg` converts valid Mermaid code to SVG, and `get_mermaid_docs_link` returns the documentation URL.
Mermaid MCP Server
@abekdwight
基本信息
关于 Mermaid MCP Server
An MCP server providing tools for validating and rendering Mermaid diagrams.
Mermaid MCP Server 配置
Mermaid MCP Server 工具
9** Validate Mermaid syntax without rendering.
** `{ "mermaid_code": "string" }`
** Text indicating success or failure with error details.
** Render Mermaid code to SVG format.
** `{ "mermaid_code": "string" }`
** SVG content as text (`mimeType: 'image/svg+xml'`) or an error message.
** Get a link to the official Mermaid documentation.
** `{}` (No input required)
** Text containing the URL.
概览
What is Mermaid MCP Server?
A Model Context Protocol (MCP) server that provides tools for validating and rendering Mermaid diagrams. It enables AI assistants like Roo to check Mermaid syntax, render diagrams into SVG format, and access official documentation links.
How to use Mermaid MCP Server?
Install globally with npm install -g mermaid-mcp-server, then configure the server in your MCP client’s settings file (e.g., Roo Cline’s mcp_settings.json) by adding an entry under mcpServers. Restart VSCode; the tools validate_mermaid, render_mermaid_svg, and get_mermaid_docs_link will then be available to the AI assistant.
Key features of Mermaid MCP Server
- Validate Mermaid diagram syntax
- Render valid Mermaid code to SVG format
- Provide a link to official Mermaid documentation
- Integrates seamlessly with MCP‑compatible clients
- Uses
@mermaid-js/mermaid-cliand Puppeteer for rendering
Use cases of Mermaid MCP Server
- Check Mermaid code correctness before generating diagrams
- Generate SVG images from Mermaid diagrams via an AI assistant
- Quickly retrieve the official Mermaid documentation URL
常见问题
What are the runtime requirements?
Node.js v18 or later, npm or yarn, a compatible MCP client (e.g., Roo Cline VSCode Extension), and network connectivity on first run for Puppeteer to download Chromium.
How do I configure the server with Roo Cline?
Install globally, then add a `mermaid-mcp-server` entry in the Roo Cline MCP settings file with `"command": "mermaid-mcp-server"`. If built from source, use `"command": "node"` with the absolute path to `build/index.js` as an argument.
Where does the server process data?
All validation and rendering happens locally on the machine where the server runs. No external services are called beyond the Puppeteer download.
What transport does the server use?
The server communicates via standard input/output (stdio), the default MCP transport. No authentication or network endpoints are configured.
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