561-group-ephemeris-moment · Ephemeris Moment

import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";

const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);

const res = await fetchWithPay("https://ephemeris.561.group/v1/ephemeris/moment/:date", {
  method: "GET",
});
const data = await res.json();

curl -X GET \
  "https://ephemeris.561.group/v1/ephemeris/moment/:date" \
  -H "X-PAYMENT: <signed x402 payment>"

{
  "accuracy": {
    "method": "independently audited against astronomy-engine (VSOP87/ELP)",
    "validRange": "1800-2050"
  },
  "aspects": [
    {
      "bodyA": "jupiter",
      "bodyB": "uranus",
      "name": "sextile",
      "offset": -0.08,
      "phase": "applying"
    }
  ],
  "bodies": {
    "sun": {
      "degreeInSign": 28.3151,
      "latitude": 0,
      "longitude": 118.3151,
      "motion": "direct",
      "sign": "Cancer",
      "speed": 0.95465
    }
  },
  "frame": "geocentric ecliptic-of-date, tropical, apparent",
  "lunarPhase": {
    "illuminatedFraction": 0.566,
    "name": "first quarter",
    "trend": "waxing"
  },
  "provenance": {
    "algorithm": "meeus-truncated-series + jpl-approximate-elements (zero-dependency)"
  },
  "time": "2026-07-21T00:00:00.000Z"
}