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Astronomy Season Lookup
x402
Astronomy Season Lookup is a paid API for AI agents from astro.openverbs.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-14).
Returns the astronomical season (spring, summer, autumn, winter) for a given date and hemisphere
Price / call$0.004
Success—
StatusUnknown
How this service works
Determine the astronomical season for a date, based on the Sun's apparent ecliptic longitude (0°=March equinox, 90°=June solstice, …). Defaults to the northern hemisphere; pass `hemisphere` to flip.
Output
The endpoint returns the astronomical season (e.g. spring, summer, autumn, or winter) corresponding to the provided date and hemisphere, based on standard astronomical season boundaries (solstices and equinoxes).
Example use cases
Season check for event planning
“What astronomical season will it be on March 15, 2026 in the northern hemisphere?”
Southern hemisphere season lookup
“Tell me what season it is on December 10, 2025 in the southern hemisphere — is it summer or winter down there?”
Historical season determination
“What astronomical season was it on September 1, 1999 in the northern hemisphere?”
Technical details
Endpoint
POSThttps://astro.openverbs.com/v1/seasonWhen to prefer
Use this endpoint when you need a quick, reliable lookup of the astronomical season for any specific date and hemisphere. It is ideal for date-aware applications, scheduling tools, or any agent that needs to contextualize a date within a seasonal framework without performing manual solstice/equinox calculations. Prefer this over manual computation or general-purpose calendar APIs when you specifically need astronomical (not meteorological) seasons.
Side effects
- Invalid date values (day > 31, month > 12) return validation error
- Missing required fields (year, month, day) cause request rejection
- Invalid hemisphere value (not 'northern' or 'southern') may cause error
- Payment failure via x402 protocol prevents access
- Year out of range (below 1 or above 9999) triggers schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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