Connect-MCP

Line9

ai.line9/diagrams · v0.4.4

Render Mermaid with Line9 layout in your assistant.

MCPremoteno credentials

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Last check

Reachable, 3 tools, protocol 2025-06-18 · checked 2026-10-17

Test & rating

B 88/100

What it does: 3 tools · 3 read, 0 write · Messaging

Test call list_diagrams: needs a key: HTTP 401 (1,395 ms)

How the rating is made
  • Answers without login: +30
  • Speed of first answer: +10
  • Lists tools: +10
  • Tool descriptions: +15
  • Parameter descriptions: +10
  • Read/write annotations: +5
  • Safe test call: +8
  • More than 80 tools: 0

Tested 2026-10-17. Fixed rules, no AI model. Grade A needs a successful real call.

Install

Remote URL
https://mcp.line9.ai/mcp

Tools

3 tools listed at last check
  • 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

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