{"x402Version":2,"name":"Astronomy","description":"Astronomy primitives — the astronomical Julian Date of an instant, sunrise/sunset/solar-noon for a location, the Moon's phase and illumination, and the astronomical season. All times UTC.","version":"0.1.0","openapi":"https://astro.openverbs.com/openapi.json","resources":[{"url":"https://astro.openverbs.com/v1/julian-date","method":"POST","description":"Compute the astronomical Julian Date (JD, fractional, epoch noon 1 Jan 4713 BC) and Modified Julian Date (MJD = JD − 2400000.5) of a UTC instant. Unlike `calendar`'s integer Julian Day Number, this carries the time-of-day fraction.","tags":["julian date calculator","modified julian date","utc to julian date","astronomical jd api","compute mjd","date to jd"],"accepts":[{"scheme":"exact","network":"eip155:8453","price":"$0.004","payTo":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A","asset":"USDC"}]},{"url":"https://astro.openverbs.com/v1/sun","method":"POST","description":"Compute sunrise, sunset, solar noon and day length for a latitude/longitude (east-positive) and date, using the NOAA sunrise equation. All times are UTC ISO-8601. Locations in polar day or night return null rise/set with a `polar` flag — a successful result, not an error.","tags":["sunrise sunset api","solar noon calculator","day length lookup","noaa sunrise equation","sun times by location","polar day night"],"accepts":[{"scheme":"exact","network":"eip155:8453","price":"$0.004","payTo":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A","asset":"USDC"}]},{"url":"https://astro.openverbs.com/v1/moon-phase","method":"POST","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).","tags":["moon phase api","lunar phase calculator","moon illumination lookup","moon age in days","date to moon phase","synodic month phase"],"accepts":[{"scheme":"exact","network":"eip155:8453","price":"$0.004","payTo":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A","asset":"USDC"}]},{"url":"https://astro.openverbs.com/v1/season","method":"POST","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.","tags":["astronomical season api","season by date","equinox solstice season","solar longitude lookup","hemisphere season calculator","date to season"],"accepts":[{"scheme":"exact","network":"eip155:8453","price":"$0.004","payTo":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A","asset":"USDC"}]}]}