Mermaid Chart

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Validate and render Mermaid diagrams, fetch syntax docs, and work with Mermaid files in GitHub, Jira and Notion.

state.ok.long (state.ok.title)Streamable HTTP

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https://mcp.mermaidchart.com/mcp

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mcp.tc/i/mermaid

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Connects an assistant to Mermaid Chart to validate and render Mermaid diagrams, look up official syntax documentation for each diagram type, search AWS, Azure, GCP and FontAwesome icons, and generate titles and summaries for diagrams.

Further tools read and write .mmd files, issues, branches and pull requests in GitHub, build diagrams from Jira tickets (dependency trees, kanban boards, timelines), and read or update Mermaid code blocks in Notion pages.

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  • Validate and render Mermaid code as a diagram image
  • Get official syntax docs and examples per diagram type
  • Search AWS, Azure, GCP and FontAwesome icons
  • Generate diagram titles and summaries
  • List and read .mmd files in GitHub repositories
  • Open pull requests and issues in GitHub
  • Generate Jira dependency trees, kanban boards and timelines
  • Read, insert and update Mermaid blocks in Notion pages

listing.tools 25

  • validate_and_render_mermaid_diagramlisting.hint.ro

    Render Mermaid code to an image, returning error details if validation fails.

  • get_diagram_titlelisting.hint.ro

    Suggest a descriptive title for a Mermaid diagram.

  • get_diagram_summarylisting.hint.ro

    Produce a short summary of a diagram's flow, decisions and outcomes.

  • search_mermaid_iconslisting.hint.ro

    Search AWS, Azure, GCP and FontAwesome icons by provider or name.

  • get_mermaid_syntax_documentlisting.hint.ro

    Get syntax documentation and examples for a Mermaid diagram type.

  • list_toolslisting.hint.ro

    List available MCP servers and their tools in the workspace.

  • list_reposlisting.hint.ro

    List GitHub repositories for the user or an organization.

  • list_mermaid_fileslisting.hint.ro

    List .mmd files in a GitHub repository.

  • read_mermaid_filelisting.hint.ro

    Read a single .mmd file from a GitHub repository.

  • create_prlisting.hint.writes

    Create a branch, commit file changes and open a pull request.

  • push_filelisting.hint.writes

    Create or update a single file on a branch in GitHub.

  • list_pullslisting.hint.ro

    List pull requests for a GitHub repository.

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  • list_brancheslisting.hint.ro

    List branches or resolve a single branch name.

  • list_issueslisting.hint.ro

    List issues in a repository, excluding pull requests.

  • create_issuelisting.hint.writes

    Create an issue in a GitHub repository.

  • get_issue_commentslisting.hint.ro

    List comments on an issue by number.

  • get_pull_commentslisting.hint.ro

    Get thread and inline review comments for a pull request.

  • generate_ticket_dependency_treelisting.hint.ro

    Build a Mermaid flowchart of Jira issue dependency links.

  • generate_jira_kanban_boardlisting.hint.ro

    Build a Mermaid kanban board from Jira issues grouped by status.

  • generate_ticket_diagramlisting.hint.ro

    Build a flowchart around one Jira ticket with subtasks, links and comments.

  • generate_ticket_timelinelisting.hint.ro

    Diagram a Jira ticket's changelog as a state diagram or timeline.

  • get_notion_page_mermaid_diagramslisting.hint.ro

    Extract all Mermaid code blocks from a Notion page.

  • get_notion_mermaid_diagram_by_block_idlisting.hint.ro

    Fetch one Mermaid code block from Notion by block ID.

  • update_notion_mermaid_diagramlisting.hint.writes

    Update the code and caption of an existing Mermaid block in Notion.

  • insert_notion_mermaid_diagramlisting.hint.writes

    Append a Mermaid diagram as a code block at the end of a Notion page.

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  • Render this Mermaid sequence diagram and fix any syntax errors

  • Show me the Mermaid syntax for a Gantt chart

  • Generate a kanban board from the Jira project PLAT

  • Insert this flowchart as a Mermaid block on my Notion page

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Claude Code

  1. Run this in a terminal, in your project folder:
claude mcp add --transport http mermaid https://mcp.mermaidchart.com/mcp
  1. Start Claude Code and type /mcp. mermaid should show as connected.

Add --scope user to make it available in every project, not just this one.

Claude Desktop

  1. Open Settings → Connectors and click Add custom connector.
  2. Name it Mermaid Chart and paste this URL:
https://mcp.mermaidchart.com/mcp
  1. Click Add. Its tools appear in the chat's tools menu.

Claude Desktop's JSON config file only starts local servers. Remote servers go through Connectors, and connectors you add on claude.ai show up here too.

claude.ai

  1. Open the connector form on claude.ai. This button fills in the name and URL for you:
  1. Check that the URL reads https://mcp.mermaidchart.com/mcp and click Add.
  2. Turn it on in a chat from the tools menu.

Free plans allow one custom connector. On Team and Enterprise plans an owner adds it under Organization settings → Connectors.

ChatGPT

  1. On chatgpt.com, open Settings → Security and login and turn on Developer mode.
  2. Go to chatgpt.com/plugins and click + to create an app for a remote MCP server.
  3. Paste https://mcp.mermaidchart.com/mcp as the server URL and choose No authentication.

Developer mode is available on the web for Plus, Pro, Business, Enterprise and Education accounts.

Cursor

Or add it by hand to ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (this project):

mcp.json
{
  "mcpServers": {
    "mermaid": {
      "url": "https://mcp.mermaidchart.com/mcp"
    }
  }
}

VS Code

Or from a terminal:

code --add-mcp '{"name":"mermaid","type":"http","url":"https://mcp.mermaidchart.com/mcp"}'

Or commit it to the repo in .vscode/mcp.json:

.vscode/mcp.json
{
  "servers": {
    "mermaid": {
      "type": "http",
      "url": "https://mcp.mermaidchart.com/mcp"
    }
  }
}

Devin Desktop

  1. Add it to ~/.config/devin/mcp_config.json (macOS and Linux) or %APPDATA%\devin\mcp_config.json (Windows):
mcp_config.json
{
  "mcpServers": {
    "mermaid": {
      "serverUrl": "https://mcp.mermaidchart.com/mcp"
    }
  }
}
  1. Refresh the MCP server list in Cascade.

Devin Desktop is the new name for Windsurf. It reads serverUrl (or url) for remote servers.

Codex

codex mcp add mermaid --url https://mcp.mermaidchart.com/mcp

Or edit ~/.codex/config.toml directly:

config.toml
[mcp_servers.mermaid]
url = "https://mcp.mermaidchart.com/mcp"

Gemini CLI

gemini mcp add --transport http mermaid https://mcp.mermaidchart.com/mcp

This adds it to the current project. Add -s user to use it everywhere.

Any client

Most clients accept this shape. Some name the URL field differently: serverUrl in Devin Desktop, httpUrl in Gemini CLI's settings file.

{
  "mcpServers": {
    "mermaid": {
      "type": "http",
      "url": "https://mcp.mermaidchart.com/mcp"
    }
  }
}

Zed puts servers under context_servers in its settings. Cline needs "type": "streamableHttp", or it assumes SSE.

Client only starts local servers? Bridge it with npx -y mcp-remote https://mcp.mermaidchart.com/mcp.

listing.faq

Can I paste mcp.tc/i/mermaid into my MCP client?

No. mcp.tc links are pages, not server addresses. Connect with https://mcp.mermaidchart.com/mcp, so your client talks to Mermaid Chart directly. The quick link is for sharing: it opens this page, with setup steps for every client.

Does Mermaid Chart need an API key or a sign-in?

No. Mermaid Chart doesn't ask for an account or key.

Is Mermaid Chart a remote or a local server?

Remote. Mermaid Chart hosts it at https://mcp.mermaidchart.com/mcp, and it speaks Streamable HTTP. There's nothing to install.

What can Mermaid Chart do?

It has 25 tools, including validate_and_render_mermaid_diagram, get_diagram_title and get_diagram_summary. You can validate and render Mermaid code as a diagram image, get official syntax docs and examples per diagram type and search AWS, Azure, GCP and FontAwesome icons.

Which clients can use it?

Any client that supports remote MCP servers: Claude Code, Claude Desktop, claude.ai, ChatGPT in developer mode, Cursor, VS Code, Devin Desktop, Codex, Gemini CLI, Zed and others. The setup steps cover each one.

Who wrote this page?

mcp.tc's robot read Mermaid Chart's own metadata (its MCP handshake, tool list and public pages), and an AI model drafted the text from it. A person reviews anything the checks can't confirm. The text can still be wrong, so if you spot a mistake, use Report this listing on this page.

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Markdown
[![Mermaid Chart on mcp.tc](https://mcp.tc/i/mermaid/badge.svg)](https://mcp.tc/i/mermaid)
HTML
<a href="https://mcp.tc/i/mermaid"><img src="https://mcp.tc/i/mermaid/badge.svg" alt="Mermaid Chart on mcp.tc" height="20"></a>

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HTML
<script src="https://mcp.tc/w/mermaid.js" async></script>

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iframe

HTML
<iframe src="https://mcp.tc/embed/mermaid" title="Mermaid Chart on mcp.tc" width="420" height="200" loading="lazy" allow="clipboard-write" style="border:0;border-radius:8px;max-width:100%"></iframe>

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JSON

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https://mcp.tc/i/mermaid.json

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