Line9
Render Mermaid with Line9 layout in your assistant.
Connect it
Settings → Connectors → Add custom connector
URL: https://mcp.line9.ai/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://mcp.line9.ai/mcp{
"mcpServers": {
"diagrams": {
"url": "https://mcp.line9.ai/mcp"
}
}
}claude mcp add --transport http diagrams https://mcp.line9.ai/mcp{
"servers": {
"diagrams": {
"type": "http",
"url": "https://mcp.line9.ai/mcp"
}
}
}3 tools, verified live
render_diagramread-onlyRender 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 â kind, size, warnings, or a parse error with its line and column â plus an "Open in Line9" link. On a par
list_diagramsread-onlyList 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_diagramread-onlyFetch 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 â 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 new one. Requires Line9 sign-in. This connector cannot publish or save. To publish, the user open
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