The Mermaid MCP MCP server,
connected in one click.
MCP server for Mermaid diagram validation and rendering. Connect the official Mermaid MCP MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
What your AI can do with Mermaid MCP
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “validate_and_render_mermaid_diagram”: SIMPLE RENDER TOOL - Renders Mermaid diagrams directly (Mermaid automatically validates during rendering). If successful, returns diagram im.”
“Use “get_diagram_title”: Generate a descriptive title for a Mermaid diagram based on its content. This tool analyzes the diagram structure and content to suggest an.”
“Use “get_diagram_summary”: Generate a concise summary for a Mermaid diagram based on its content. This tool provides prompts for the LLM to generate a brief summary (2.”
“Use “search_mermaid_icons”: Search for available Mermaid icons by provider or name. Returns icons in ready-to-use format with provider prefixes (e.g., 'aws:arch-amazon-.”
How secure is the Mermaid MCP MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Mermaid MCP holds up.
Official endpoint
Operated by Mermaid MCP (mermaidchart.com) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If Mermaid MCP adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick Mermaid MCP
Choose Mermaid MCP in the gate directory. No sign-in needed.
Use it anywhere
Mermaid MCP's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools Mermaid MCP exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
validate_and_render_mermaid_diagram — SIMPLE RENDER TOOL - Renders Mermaid diagrams directly (Mermaid automatically validates during rendering). If successful, returns diagram im
get_diagram_title — Generate a descriptive title for a Mermaid diagram based on its content. This tool analyzes the diagram structure and content to suggest an
get_diagram_summary — Generate a concise summary for a Mermaid diagram based on its content. This tool provides prompts for the LLM to generate a brief summary (2
search_mermaid_icons — Search for available Mermaid icons by provider or name. Returns icons in ready-to-use format with provider prefixes (e.g., 'aws:arch-amazon-
get_mermaid_syntax_document — Get comprehensive syntax documentation and examples for a specific Mermaid diagram type. Returns the official Mermaid.js documentation with
list_tools — Lists all available MCP servers and their tools in the workspace.
list_repos — List GitHub repositories for the authenticated user, or for an organization when `org` is set. REQUIRES: `Github-Token` header (HTTP) or `GI
list_mermaid_files — List .mmd Mermaid files in a GitHub repository (code search with tree fallback). REQUIRES: `Github-Token` header (HTTP) or GITHUB_TOKEN / GH
+ 17 more tools once connected
The Mermaid MCP MCP server at a glance
https://mcp.mermaidchart.com/mcpQuestions, answered
Is there an official Mermaid MCP MCP server?
Yes — Mermaid MCP operates its own remote MCP server at mcp.mermaidchart.com. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect Mermaid MCP to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick Mermaid MCP in the directory. No account or sign-in is needed. From then on, Mermaid MCP's tools are available in every client you've connected to gate.
Do I need to host anything?
No. Mermaid MCP runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the Mermaid MCP MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect Mermaid MCP in minutes. No credit card required.
Connect more than just Mermaid MCP
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up Mermaid MCP in: Claude · Claude Code · ChatGPT · Cursor · VS Code