Line9 MCP server

Which servers in the official MCP registry are Line9's own, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-13

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Whose server it is

Registry nameai.line9/diagramsverified in the MCP registry

The registry name sits under line9.ai. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-13

Stateanswerschecked 2026-10-13
Tools3
Server calls itselfLine9
Server version0.5.0
Protocol version2025-06-18

On 2026-10-13 the server answered initialize and tools/list without a sign-in. First answer in 517 ms.

Tools it offers3 tools · read 2026-10-13

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…
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…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

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

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.