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Calendar Systems Moon Phase
x402
Calendar Systems Moon Phase is a paid API for AI agents from calendar-systems.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-31).
Returns moon phase name, age in days, illumination fraction, and previous/next lunar event times (new moon, quarters, full moon) for a given date.
Price / call$0.02
Success—
StatusUnknown
How this service works
Moon phase name, age in days, approximate illumination and the previous/next new, quarter and full moon times for a date.
Output
Returns a JSON object with the moon's phase name (e.g. 'Waxing Crescent'), age in days since last new moon, illumination fraction (0–1), waxing boolean, elongation in degrees, ISO datetime strings for the previous new moon, previous full moon, next new moon, next first quarter, next full moon, next last quarter, lunation length in days, mean synodic month in days, and metadata fields like timeBasis and disclaimer.
Example use cases
Checking moon for outdoor photography
“I'm planning a night photography shoot on August 15th 2025 — can you tell me the moon phase, how illuminated it will be, and whether it's waxing or waning that night?”
Planning a fishing trip by lunar calendar
“We're going fishing on September 3rd 2025 and want to fish around a new moon. Can you tell me the moon phase for that date and when the nearest new moon is?”
Historical moon phase research
“What was the moon phase on June 6th 1944? I need the phase name, age in days, illumination, and the dates of the surrounding new and full moons.”
Technical details
Endpoint
GEThttps://calendar-systems.x402tookit.com/moon-phase?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need detailed lunar phase data for a single specific date, including illumination, age, waxing/waning status, and surrounding lunar event times. Prefer this over a bulk lunar events endpoint when you only need the context around one date rather than all moon phases in a month.
Side effects
- Date out of supported range (1900–2100) returns an error or degraded result
- Invalid date format causes a validation error
- Missing required 'date' query parameter returns a bad request error
- Time parameter in wrong format (not HH:MM) may default to 12:00 or return an error
- Network or service unavailability returns no response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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