{"uid":"cap_aoNPrhdg22XjwomoPcXhw","slug":"moon-phase-lookup-0b2ad1da","name":"Moon Phase Lookup","description":"Compute the Moon's phase name, age in days since the last new moon and illuminated fraction (0..1) for a UTC date/time. Uses the mean synodic month (29.53 days).","url":"https://astro.openverbs.com/v1/moon-phase","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},"hour":{"type":"integer","maximum":23,"minimum":0,"description":"UTC hour. Default 12."},"year":{"type":"integer","maximum":9999,"minimum":1},"month":{"type":"integer","maximum":12,"minimum":1},"minute":{"type":"integer","maximum":59,"minimum":0,"description":"Default 0."}},"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_DfQaa_8gv8up7ZhL0740p","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 moon phase for a given calendar date and UTC time","exampleAgentPrompt":"What is the moon phase on July 4, 2025 at 9pm UTC?","exampleUseCases":[{"title":"Birthday lunar phase lookup","prompt":"What was the moon phase on March 15, 1990 at 12:00 UTC? I want to know what the moon looked like on the day I was born."},{"title":"Event planning moon check","prompt":"Can you check the moon phase for June 21, 2025 at midnight UTC? I'm planning an outdoor summer solstice party and want to know if we'll have a bright full moon or a dark sky."},{"title":"Monthly new moon finder","prompt":"What is the moon phase on February 1, 2026 at hour 0 UTC? I'm trying to figure out when the new moon falls this month for my lunar calendar."}],"resultDescription":"Returns the moon phase for the specified date and time, including the phase name (e.g., new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, last quarter, waning crescent), phase angle or illumination percentage, and other relevant lunar cycle details.","failureModes":["Missing required fields (year, month, day) returns a validation error","Day value out of range for the given month may return an error or unexpected result","Year outside 1–9999 range returns a validation error","Invalid month value (outside 1–12) returns a validation error","Network timeout or service unavailability returns a 5xx error","Hour or minute out of valid range returns a validation error"],"whenToPreferThis":"Choose this endpoint when you need a precise, programmatic lookup of the moon phase for any historical or future date, especially when you need a specific UTC time component alongside the date. Prefer this over general almanac queries when integrating lunar phase data into an automated workflow, event planner, or astrology application.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:41:23.319Z","isFirstParty":false}