MCP server

Usno Astronomy

io.github.pipeworx-io/usno-astronomy

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Next solar eclipse, eclipse times by place, Moon phases and seasons from the US Naval Observatory.

Working at last checkOfficial: pipeworx.io's GitHub account (pipeworx-io)About 27,357 tokens per request once connected46 tools

https://gateway.pipeworx.io/usno-astronomy/mcp

At a glance

Type: MCP server
Publisher: pipeworx.io (verified by the MCP Registry)
Status: Working at last check
Tools: 46
Token cost: About 27,357 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http usno-astronomy https://gateway.pipeworx.io/usno-astronomy/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.usno-astronomy]
url = "https://gateway.pipeworx.io/usno-astronomy/mcp"

Gemini CLI

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

Cursor

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

VS Code

{"servers":{"usno-astronomy":{"type":"http","url":"https://gateway.pipeworx.io/usno-astronomy/mcp"}}}

Antigravity

agy mcp add usno-astronomy https://gateway.pipeworx.io/usno-astronomy/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"usno-astronomy","server_url":"https://gateway.pipeworx.io/usno-astronomy/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"usno-astronomy","server_url":"https://gateway.pipeworx.io/usno-astronomy/mcp"}

usno_eclipse_circumstances ~383 tokens
Local circumstances of a solar eclipse at a given latitude/longitude on a given date — whether the Sun is totally, annularly or partially eclipsed there, the magnitude and obscuration (percentage of the Sun covered), the duration, and the UT time, Sun altitude and azimuth of each contact (eclipse be
usno_moon_phases ~261 tokens
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 i
usno_seasons ~179 tokens
The seasons for a year from the US Naval Observatory: the UT date and time of the March and September equinoxes, the June and December solstices, and Earth's perihelion and aphelion. Answers "when is the summer solstice", "what date is the autumn equinox in 2027", "first day of spring", "when is Ear
usno_solar_eclipses ~231 tokens
When is the next solar eclipse — the list of solar eclipses in a year from the US Naval Observatory, each with its date and type (total, annular, partial, hybrid). With no arguments it returns the NEXT solar eclipse after today plus the rest of the current and following year, so "when is the next so

CycleCalcs Astronomy
Read-only astronomy calculations: sun, moon, planets, eclipses, twilight and star positions.
Astronomy
Offline observational astronomy: positions, rise/set, moon phases, eclipses, and seasons.
Sky and Signs — horoscopes and sky calendars
Daily horoscopes (en/es, 7 days ahead), moon phases, Panchang, solar terms, Maya, Ramadan dates.
Trikaal Vaani Jyotish
Vedic astrology (Jyotish): kundali, dasha, yog, dosha, muhurat, milan — Swiss Ephemeris + BPHS
Kaalshodh — Indian astronomy time machine
Observatory-grade Indian astronomy, years -5000..+5000: positions, eclipses, panchang date search.
Totally Tarot Calculators
Astrology, Vedic, Chinese and Maya calendar maths on real engines, cited in every answer.
Daily Alignment
The Chinese almanac, lunar dates, Four Pillars, solar terms and the sky, calculated from astronomy.
Caelus
34-tool Caelus MCP for validated astrology: charts, transits, Vedic, facts, sky view, synthetic.

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