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Sindri Astronomy Ephemeris
x402
Sindri Astronomy Ephemeris is a paid API for AI agents from ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).
Computes sunrise, sunset, solar noon, day length, and moon phase for a given latitude, longitude, and date using precise solar/lunar position 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 data for the given location and date, including sunrise time, sunset time, solar noon time, total day length in hours/minutes, and moon phase (e.g. waxing crescent, full moon, percentage illuminated), all computed from standard solar/lunar position algorithms.
Example use cases
Golden hour photography planning
“I'm shooting a landscape in Denver, Colorado on July 4, 2025 — can you tell me exactly when sunrise and sunset are so I can plan for golden hour?”
Camping trip moon phase check
“We're going backcountry camping at 36.5°N, 118.5°W starting August 12, 2025 — what will the moon phase be and how many hours of daylight can we expect?”
Winter solstice day length lookup
“How long is the day in Tromsø, Norway (69.65°N, 18.95°E) on December 21, 2025? I want to know the exact sunrise and sunset times.”
Technical details
Endpoint
POSThttps://ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/astronomyEphemeris?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need precise, mathematically computed astronomical data (sunrise, sunset, solar noon, day length, moon phase) for any geographic coordinate and date — especially when LLM reasoning alone would be unreliable for exact times. Prefer this over general-purpose time APIs that don't include moon phase, or over weather APIs that approximate solar data.
Side effects
- Invalid or out-of-range latitude/longitude returns an error
- Malformed or missing date string causes a validation error
- Locations near the poles during polar day/night may return null sunrise/sunset times
- Network timeout on the Lambda cold start
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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