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Sindri Astronomy Ephemeris
x402
Sindri Astronomy Ephemeris is a paid API for AI agents from x402.outpimp.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Returns sunrise, sunset, solar noon, day length, and moon phase for a given latitude, longitude, and date using precise astronomical algorithms.
Price / call$0.01
Success—
StatusUnknown
How this service works
Sunrise, sunset, solar noon, day length, and moon phase for a given latitude/longitude/date, computed via the suncalc library (standard solar/lunar position algorithms) — precise astronomical math an LLM cannot reliably compute mentally.
Output
Returns precise astronomical event times (sunrise, sunset, solar noon) in UTC or local time, total day length in hours/minutes, and current moon phase (e.g. waxing crescent, full moon, new moon) for the given coordinates and date.
Example use cases
Outdoor photography golden hour planning
“I'm doing a sunrise shoot in Santorini, Greece on September 15, 2025 — what time is sunrise and how long is the day? The location is about 36.4° N, 25.4° E.”
Camping trip moonlight conditions
“I'm going backcountry camping near Yosemite (37.8651° N, 119.5383° W) on August 12, 2025 — what's the moon phase that night and when does it get dark?”
Religious or cultural observance timing
“What time does the sun set in Jerusalem (31.7683° N, 35.2137° E) on September 22, 2025? I need to know when Shabbat begins.”
Technical details
Endpoint
POSThttps://x402.outpimp.com/astronomyEphemerisWhen to prefer
Use this endpoint when you need precise, mathematically-computed solar or lunar data for a specific location and date — especially when accuracy matters for photography, navigation, religious observances, or event planning. Prefer this over asking an LLM directly, since LLMs cannot reliably compute exact astronomical times from solar position equations. This endpoint is ideal for single-point ephemeris lookups rather than bulk or real-time tracking.
Side effects
- Invalid or out-of-range latitude/longitude returns a validation error
- Malformed ISO date string causes a 400-level error
- Polar regions during midnight sun or polar night may return unusual or null sunrise/sunset values
- Network timeout or service unavailability returns a 5xx error
- Missing required fields (latitude, longitude, or date) results in a bad request error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| date | string | ISO date string, e.g. "2024-06-21". |
| latitude | number | Latitude in degrees (-90 to 90). |
| longitude | number | Longitude in degrees (-180 to 180). |
Tags
x402
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