{"uid":"cap_6T5EHBstUevrgFd5SSCAJ","slug":"calendar-systems-moon-phase-5fb2e54a","name":"Calendar Systems Moon Phase","description":"Moon phase name, age in days, approximate illumination and the previous/next new, quarter and full moon times for a date.","url":"https://calendar-systems.x402tookit.com/moon-phase?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["date"],"properties":{"date":{"type":"string","description":"YYYY-MM-DD, 1900 to 2100"},"time":{"type":"string","description":"UTC time HH:MM, default 12:00"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"phase":{"type":["null","string"]},"source":{"type":["null","string"]},"waxing":{"type":["boolean","null"]},"ageDays":{"type":["null","number"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"weekday":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"timeBasis":{"type":["null","string"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"nextNewMoon":{"type":["null","string"]},"nextFullMoon":{"type":["null","string"]},"elongationDeg":{"type":["null","number"]},"nextLastQuarter":{"type":["null","string"]},"previousNewMoon":{"type":["null","string"]},"nextFirstQuarter":{"type":["null","string"]},"previousFullMoon":{"type":["null","string"]},"lunationLengthDays":{"type":["null","number"]},"illuminationFraction":{"type":["null","number"]},"meanSynodicMonthDays":{"type":["null","number"]}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_RVZ5KBqLOSbT2eKUZvYfV","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns moon phase name, age in days, illumination fraction, and previous/next lunar event times (new moon, quarters, full moon) for a given date.","exampleAgentPrompt":"What's the moon phase on July 4th 2025? I want to know the phase name, how many days old the moon is, the illumination fraction, and when the next full moon and next new moon will be.","exampleUseCases":[{"title":"Checking moon for outdoor photography","prompt":"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?"},{"title":"Planning a fishing trip by lunar calendar","prompt":"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?"},{"title":"Historical moon phase research","prompt":"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."}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T00:34:47.934Z","isFirstParty":false,"canonicalSlug":"calendar-systems-moon-phase-5fb2e54a"}