Validate and render Mermaid diagrams through an MCP server. For developers building tools that need to parse, check, or generate diagram syntax without running local Mermaid.
com.mermaidchart/mermaid-mcp
https://mcp.mermaidchart.com/mcp
HTTP
No auth required
How models use it and what it is built for.
Validate and render Mermaid diagrams through an MCP server. For developers building tools that need to parse, check, or generate diagram syntax without running local Mermaid.
Hosted endpoint — paste into any MCP client.
Where to find authoritative docs and source for Mermaid.
Paste any of these into Agent Studio after connecting Mermaid.
Common questions about connecting and running Mermaid.
What diagram types does this MCP server support?
The server supports Mermaid diagram validation and rendering. Refer to the official Mermaid documentation for the full list of supported diagram types (flowcharts, sequence diagrams, Gantt charts, class diagrams, state diagrams, and more).
How do I connect to the Mermaid MCP server?
The server is hosted at https://mcp.mermaidchart.com/mcp and uses HTTP transport. Configure your MCP client to point to this endpoint to start validating and rendering diagrams.
Can I use this server to validate Mermaid syntax before rendering?
Yes, the server provides diagram validation as a core capability. You can send Mermaid syntax to validate it and receive feedback on errors before rendering.
Is there a cost to use this MCP server?
Pricing information is not specified in the registry metadata. Check the MermaidChart website or contact their support for details on any usage limits or pricing tiers.
What should I do if my diagram fails validation?
The server will return validation errors indicating what's wrong with your Mermaid syntax. Review the error messages, consult the Mermaid documentation for correct syntax, and resubmit your corrected diagram.
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