mermaid
Overview
The mermaid MCP server is a Model Context Protocol (MCP) server that enables AI assistants and agents to generate and work with Mermaid diagrams through a structured, AI-friendly interface. It allows AI-driven workflows to create visual representations of systems, processes, architectures, and relationships using Mermaid’s text-based diagram syntax — without leaving the AI environment.
This server is especially useful for documentation, architecture design, system explanation, and workflows where visual clarity improves understanding and communication.
Transport
streamable-http
Tools
Key Capabilities
- Text-to-diagram generation — Create diagrams using Mermaid’s declarative syntax.
- Architecture and system visualization — Represent services, components, and dependencies visually.
- Process and workflow diagrams — Illustrate sequences, state machines, and flows.
- Documentation support — Embed diagrams directly into docs, READMEs, and design artifacts.
- Improved communication — Help AI assistants explain complex systems visually.
How It Works
The mermaid MCP server runs as an MCP service that accepts structured descriptions or diagram definitions from AI clients and produces Mermaid-compatible outputs. AI clients communicate with the server over the MCP protocol as part of broader reasoning or documentation workflows.
The server handles formatting, validation, and normalization of Mermaid syntax, returning diagram definitions that can be rendered by Mermaid-compatible viewers or embedded directly into documentation systems. By isolating diagram generation behind MCP, AI assistants can reliably create and refine visuals without embedding rendering or syntax logic themselves.
This design allows AI-driven workflows to move seamlessly between reasoning, explanation, and visualization, making Mermaid diagrams an integral part of MCP-powered documentation and design processes.