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Moon Phase Lookup by Date
x402
Moon Phase Lookup by Date is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-19).
Returns the moon phase name, illumination percentage, lunar age, and next new/full moon dates for a given calendar date.
Price / call$0.003
Success—
StatusUnknown
How this service works
Moon phase on a date: name, illuminated percentage, lunar age and the next new and full moon dates. Local astronomical calculation.
Output
A JSON object containing: the queried date, the moon phase name (e.g. 'last quarter', 'full moon'), illumination percentage, lunar age in days, next new moon date, next full moon date, and a note indicating calculation accuracy (±1 day on phase dates).
Example use cases
Wedding date moon phase check
“Can you tell me the moon phase on June 14th, 2026? I'm planning a wedding and want to know if there will be a full moon — include how bright it'll be and when the next full moon is.”
Photographer's golden night planning
“What will the moon look like on September 3rd, 2025? I need the phase name, illumination percentage, and lunar age so I can plan a night photography shoot.”
Fishing trip lunar timing
“Check the moon phase for March 22nd, 2026 — is it a new moon or close to one? Also tell me when the next new and full moons are around that date.”
Technical details
Endpoint
POSThttps://api.vextorium.com/v1/moon-phase?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need quick, locally-computed lunar phase data for any calendar date without relying on external astronomy APIs. It is ideal for date-specific lookups where exact phase transitions are needed and a ±1 day accuracy margin is acceptable. Prefer this over ephemeris-based services when low latency and low cost matter more than sub-hour precision.
Side effects
- Invalid date format (non-YYYY-MM-DD string) may return an error or default to today
- Dates extremely far in the past or future may produce inaccurate results due to mean calculation approximations
- Missing body may default to today's date rather than returning an error
- Network timeout on payment verification
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| date | string | YYYY-MM-DD (default today) |
Output
Schema · Response
{
"type": "json",
"example": {
"date": "2026-10-02",
"note": "Mean calculation (±1 day on phase dates).",
"phase": "last quarter",
"age_days": 20.97,
"next_new_moon": "2026-10-11",
"next_full_moon": "2026-10-26",
"illumination_pct": 62.4
}
}Tags
x402
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