{"uid":"cap_9fFclsCQdma6lHHhkWdjD","slug":"moon-phase-lookup-by-date-585f2730","name":"Moon Phase Lookup by Date","description":"Moon phase on a date: name, illuminated percentage, lunar age and the next new and full moon dates. Local astronomical calculation.","url":"https://api.vextorium.com/v1/moon-phase?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"date":{"type":"string","description":"YYYY-MM-DD (default today)"}}},"responseSchema":{"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}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_o3uR2TmohVWiFLXqxuIwj","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the moon phase name, illumination percentage, lunar age, and next new/full moon dates for a given calendar date.","exampleAgentPrompt":"What's the moon phase on October 31st, 2025? I want to know the phase name, how illuminated it is, its lunar age, and when the next new and full moons will be after that date.","exampleUseCases":[{"title":"Wedding date moon phase check","prompt":"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."},{"title":"Photographer's golden night planning","prompt":"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."},{"title":"Fishing trip lunar timing","prompt":"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."}],"resultDescription":"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).","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-19T12:46:02.532Z","isFirstParty":false,"canonicalSlug":"moon-phase-lookup-by-date-585f2730"}