{"uid":"cap_a1AGcjcB9GjF3jYbbDubK","slug":"astronomy-season-lookup-fd6a6bd0","name":"Astronomy Season Lookup","description":"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.","url":"https://astro.openverbs.com/v1/season","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","required":["year","month","day"],"properties":{"day":{"type":"integer","maximum":31,"minimum":1},"year":{"type":"integer","maximum":9999,"minimum":1},"month":{"type":"integer","maximum":12,"minimum":1},"hemisphere":{"enum":["northern","southern"],"type":"string","description":"Default northern."}},"additionalProperties":false},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.004","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.004/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_-IxvxjYOAW_oRFK-_pXCA","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.004","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the astronomical season (spring, summer, autumn, winter) for a given date and hemisphere","exampleAgentPrompt":"What astronomical season is it on June 21, 2025 in the northern hemisphere?","exampleUseCases":[{"title":"Season check for event planning","prompt":"What astronomical season will it be on March 15, 2026 in the northern hemisphere?"},{"title":"Southern hemisphere season lookup","prompt":"Tell me what season it is on December 10, 2025 in the southern hemisphere — is it summer or winter down there?"},{"title":"Historical season determination","prompt":"What astronomical season was it on September 1, 1999 in the northern hemisphere?"}],"resultDescription":"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).","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:34:26.603Z","isFirstParty":false}