Mermaid-MCP

Mermaid-MCP is an MCP server that generates production-ready Mermaid architecture diagrams, charts, and visualizations from natural language descriptions. It connects AI assistants directly to a local rendering pipeline powered by Puppeteer and Mermaid v10, providing developers, software architects, and technical writers with validated SVG visual assets. By translating conversational prompts into structured code, the server enables users to create more than twenty-two distinct diagram formats, including system architectures, sequence flows, entity-relationship models, and Git graphs. The server handles diagram compilation locally, validating the output as XML-compliant SVG code that renders reliably in browsers, documentation sites, and presentation software. It bridges the gap between conceptual architecture design and physical technical documentation without requiring manual Mermaid syntax composition. Engineers use it to embed system layouts directly inside codebases, maintain visual representations of services in markdown documentation, outline CI/CD pipelines, and document complex distributed applications quickly during active development cycles.

Category: Design, Media & Creative

Tags: architecture, charts, diagrams, mermaid, visualization

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How to install and configure Mermaid-MCP

1. Ensure Node.js 18 or higher is installed on your system. 2. Install the server globally from npm by running npm install -g @narasimhaponnada/mermaid-mcp-server. 3. Verify the installation in your terminal using mermaid-mcp --version. 4. To configure with GitHub Copilot in VS Code, open User Settings (JSON) and add the server definition: json { "github.copilot.mcp.servers": { "mermaid": { "command": "mermaid-mcp" } } } 5. Alternatively, build from source by cloning the repository, running npm install, and executing npm run build in the mermaid-mcp-server directory.

What you can do with Mermaid-MCP

• Creating microservices and cloud infrastructure diagrams from natural language prompts to document backend service dependencies. - Generating sequence diagrams and user authentication flowcharts to clarify complex OAuth and API interactions during development. - Visualizing CI/CD deployment pipelines and GitHub Actions workflows directly within project repositories and code review discussions. - Constructing entity-relationship and class diagrams to help new engineering team members onboard to database schemas and code structures. - Building project management roadmaps, Gantt charts, and sprint timelines for technical proposals and stakeholder presentations.

Key facts

• https://github.com/Narasimhaponnada/mermaid-mcp
• Design, Media & Creative, Developer Tools & Code Intelligence
• architecture, charts, diagrams, mermaid, visualization

Part of MCP Servers

How do I install Mermaid-MCP?

You can install Mermaid-MCP globally by running npm install -g @narasimhaponnada/mermaid-mcp-server. Alternatively, clone the source repository from GitHub, run npm install within the mermaid-mcp-server directory, and execute npm run build. It requires Node.js version 18 or higher.

What can Mermaid-MCP do?

Mermaid-MCP converts plain language prompts into over twenty-two types of Mermaid diagrams. It automates the generation of sequence diagrams, microservice architectures, flowcharts, class models, Gantt charts, and Git flows, rendering them into validated, XML-compliant SVG assets using a headless browser engine.

Which MCP clients work with Mermaid-MCP?

The server integrates with GitHub Copilot in VS Code, Claude Desktop, and Cursor IDE. It also supports direct automation via CLI execution, testing through the official MCP Inspector, and custom client implementations utilizing standard Model Context Protocol SDKs.

Is Mermaid-MCP open source?

Yes, Mermaid-MCP is open source software released under the MIT License. The complete source code, configuration guides, and example diagram templates are maintained in its public repository on GitHub.