`usno_moon_phases`

Pack: usno-astronomy · Endpoint: https://gateway.pipeworx.io/usno-astronomy/mcp

Moon phases from the US Naval Observatory: the UT date and time of every New Moon, First Quarter, Full Moon and Last Quarter in a year, or the next few phases from a given date. Answers “when is the next full moon”, “full moons in 2026”, “what phase is the Moon in this week”, “date of the new moon in October”. Pass a year for the whole year, or a start date (default today) with a count for the next phases.

Parameters

Name	Type	Required	Description
`year`	number	no	Four-digit year, 1800-2050, for every phase in that year (about 50).
`date`	string	no	Start date YYYY-MM-DD for the next phases from that day. Default today when year is omitted.
`count`	number	no	How many phases to return from the start date, 1-99. Default 8 (about two lunar months).

Example call

Arguments

{
  "year": 2026
}

curl

curl -X POST https://gateway.pipeworx.io/usno-astronomy/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"usno_moon_phases","arguments":{"year":2026}}}'

TypeScript (@pipeworx/sdk)

import { Pipeworx } from '@pipeworx/sdk';
const pipeworx = new Pipeworx();

const result = await pipeworx.call('usno_moon_phases', {
  "year": 2026
});

Connect

Add this to your MCP client config, or use one-click install buttons:

{
  "mcpServers": {
    "usno-astronomy": {
      "url": "https://gateway.pipeworx.io/usno-astronomy/mcp"
    }
  }
}

See Getting Started for client-specific install steps.

usno_moon_phases