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Almanac Sky API – Celestial Positions & Solar/Lunar Data
x402
Almanac Sky API – Celestial Positions & Solar/Lunar Data is a paid API for AI agents from almanac.locomot.io, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).
Returns real-time or scheduled solar, lunar, planetary body positions, twilight times, and next seasonal event for a given geographic location and time.
Price / call$0.003
Success—
StatusUnknown
How this service works
Deterministic ephemeris snapshot (one location/time).
Output
A JSON object containing sun data (rise, set, azimuth, elevation), moon data (rise, set, phase, illumination), planetary body positions, an array of twilight intervals, a next_season_event object (e.g. next solstice), the astronomical engine and ephemeris kernel used, and a flag indicating whether the result is deterministic — all computed for the requested lat/lon and time.
Example use cases
Example prompt
“What are the exact sunrise, sunset, moonrise, moonset, and twilight times for London (51.5074° N, -0.1278° W) tomorrow, May 20, 2025, at sea level?”
Technical details
Endpoint
GEThttps://almanac.locomot.io/skyWhen to prefer
Choose this endpoint when you need precise, computation-backed astronomical data (sun/moon positions, twilight, planetary bodies, seasonal events) for any geographic coordinate and arbitrary time. Prefer it over weather APIs (which may include basic sunrise/sunset but lack planetary positions and twilight breakdowns) and over static almanac tables (which are not real-time or coordinate-specific). Ideal for agents building stargazing planners, solar energy tools, photography golden-hour finders, or any app needing authoritative ephemeris-based celestial data.
Side effects
- Missing required lat or lon query params → 400 Bad Request
- lat out of range [-90, 90] or lon out of range [-180, 180] → validation error
- Invalid ISO-8601 format for 'when' → parsing error
- Payment not provided or insufficient → 402 Payment Required
- Server-side ephemeris computation failure → 500 Internal Server Error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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