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io.github.dmsnavin/grandline-mcp

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Empirical maritime distances from real AIS tracks: 4 route variants, port lookup, bulk matrix

Source code Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

PYPI package grandline-mcp
Claude Code 
claude mcp add grandline-mcp -e 'GRANDLINE_API_KEY=<your grandline_api_key>' -e 'GRANDLINE_API_URL=<GRANDLINE_API_URL>' -- uvx grandline-mcp==0.2.1
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "grandline-mcp": {
            "command": "uvx",
            "args": [
                "grandline-mcp==0.2.1"
            ],
            "env": {
                "GRANDLINE_API_KEY": "<your grandline_api_key>",
                "GRANDLINE_API_URL": "<GRANDLINE_API_URL>"
            }
        }
    }
}

Environment variables

  • GRANDLINE_API_KEY secret Bearer token from grandline.luzomi.com/register. Omit to use the anonymous tier (5 calls total per IP).
  • GRANDLINE_API_URL Override the API base URL (default https://grandline.luzomi.com/api/v1).

Frequently asked questions

What is io.github.dmsnavin/grandline-mcp?

Empirical maritime distances from real AIS tracks: 4 route variants, port lookup, bulk matrix

How do I install io.github.dmsnavin/grandline-mcp?

It runs on your machine. In Claude Code: claude mcp add grandline-mcp -e 'GRANDLINE_API_KEY=<your grandline_api_key>' -e 'GRANDLINE_API_URL=<GRANDLINE_API_URL>' -- uvx grandline-mcp==0.2.1. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.dmsnavin/grandline-mcp need an API key?

Yes. It expects GRANDLINE_API_KEY, which you set in its configuration.

Is io.github.dmsnavin/grandline-mcp open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains io.github.dmsnavin/grandline-mcp?

It is published by dmsnavin. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.