The Agentic Mermaid MCP server,
connected in one click.
Render, verify, describe, and safely edit Mermaid diagrams through MCP. Connect the official Agentic Mermaid 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
Add Agentic Mermaid to your AI in one minute
Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.
claude mcp add --transport http agentic-mermaid https://agentic-mermaid.dev/mcpRun in your terminal, then restart Claude Code.
Agentic Mermaid · https://agentic-mermaid.dev/mcp
What your AI can do with Agentic Mermaid
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “execute”: Run JavaScript in an isolated sandbox; return a value. One call composes edits. Submit JavaScript; declaration types are guidance. No promis.”
“Use “describe_sdk”: Return version-matched mutation operations for one diagram family. Use detail=signatures for the compact op menu or detail=fields (default).”
“Use “render_svg”: Render a Mermaid source string to themeable SVG. Returns { ok, svg }. Layout is deterministic: identical input produces identical geometry.”
“Use “render_ascii”: Render a Mermaid source string to text. Returns { ok, text }. useAscii true → plain ASCII (+,-,|); false/absent → Unicode box drawing (┌,─,│.”
How secure is the Agentic Mermaid MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Agentic Mermaid holds up.
Official endpoint
Operated by Agentic Mermaid (agentic-mermaid.dev) 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 Agentic Mermaid 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 Agentic Mermaid
Choose Agentic Mermaid in the gate directory. No sign-in needed.
Use it anywhere
Agentic Mermaid'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 Agentic Mermaid exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
execute — Run JavaScript in an isolated sandbox; return a value. One call composes edits. Submit JavaScript; declaration types are guidance. No promis
describe_sdk — Return version-matched mutation operations for one diagram family. Use detail=signatures for the compact op menu or detail=fields (default)
render_svg — Render a Mermaid source string to themeable SVG. Returns { ok, svg }. Layout is deterministic: identical input produces identical geometry.
render_ascii — Render a Mermaid source string to text. Returns { ok, text }. useAscii true → plain ASCII (+,-,|); false/absent → Unicode box drawing (┌,─,│
render_png — Rasterize a Mermaid source string to PNG. Returns { ok, png_base64 }. Hosted rendering uses resvg-wasm with bundled fonts; bytes may differ
verify — Parse and verify a Mermaid diagram without rendering it. Returns { ok, family, summary, warnings, layout: { bounds, nodes, edges } } for val
describe — Describe a Mermaid diagram. format=text returns { ok, text } with one or two summary sentences; format=json returns { ok, tree } with the AX
mutate — Apply a list of structured edit ops to an existing Mermaid `source` and return the edited diagram. This is the declarative counterpart to `e
+ 1 more tools once connected
Who runs the Agentic Mermaid MCP server?
The Agentic Mermaid MCP server at a glance
https://agentic-mermaid.dev/mcpQuestions, answered
Is there an official Agentic Mermaid MCP server?
Yes — Agentic Mermaid operates its own remote MCP server at agentic-mermaid.dev. 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 Agentic Mermaid to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick Agentic Mermaid in the directory. No account or sign-in is needed. From then on, Agentic Mermaid's tools are available in every client you've connected to gate.
Do I need to host anything?
No. Agentic Mermaid runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the Agentic Mermaid 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 Agentic Mermaid in minutes. No credit card required.
Connect more than just Agentic Mermaid
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up Agentic Mermaid in: Claude · Claude Code · ChatGPT · Cursor · VS Code
Give your AI Agentic Mermaid — safely.
One URL. All MCPs. Full control. Free to start.
Get started free