Line9 MCP Server: Install & Setup

Install Line9 in Claude Code

Claude Code

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

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

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

Frequently asked questions

What does the Line9 MCP server do?

Render Mermaid with Line9 layout in your assistant.

Is the Line9 MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Line9 run locally or remotely?

Remote. Hosted by the provider. You connect with a URL, nothing to install.

How do I add Line9 to Claude Code?

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

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