Line9

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How to connect

Add it to any MCP client that supports remote servers.

{
  "mcpServers": {
    "line9": {
      "type": "http",
      "url": "https://mcp.line9.ai/mcp"
    }
  }
}

3 tools

• render_diagram

  Render Mermaid source with Line9's layout engine. Call this whenever you write or change Mermaid and the user should see the result. Flowcharts and sequence diagrams get Line9's layout; other Mermaid kinds are rendered with Mermaid's own layout and flagged as such. Returns a…

• list_diagrams

  List the diagrams published in the user's Line9 workspace(s): name, visibility, version, last update and permalink. Use it to find a diagram before `get_diagram`. Requires Line9 sign-in.

• get_diagram

  Fetch a published diagram's current Mermaid source by name or slug, and show it rendered. The returned source is stamped with the diagram's identity — keep the `line9:` frontmatter block when you edit it so that Line9 recognises the diagram when it is opened and published there…

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