Line9

ai.line9/diagrams · v0.4.4

Tools changed (7 days)

Measured by MCP Station

Last check	Reachable
Checked at	—
Check success 7 / 30 days	—
First-try success 30 days	—
Median response	—
Lookups 30 days	—
Authentication	No auth
MCP version	2025-06-18
Rank score	—
Declared risk	Read-only (all tools declare readOnlyHint)
Capabilities declared	resources, tools
Tool definitions	3 tools · with description 100% · input schema is an object 100% · read/destructive hints 100%

Render Mermaid with Line9 layout in your assistant.

streamable-http · https://mcp.line9.ai/mcp

claude mcp add --transport http diagrams https://mcp.line9.ai/mcp

{
  "mcpServers": {
    "diagrams": {
      "url": "https://mcp.line9.ai/mcp"
    }
  }
}

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 short verdict — kind, si
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 instead of creating a

Website · JSON · Text for agents · Registry updated 2026-09-17