mirrored listing x402 eip155:8453

Moment Essentials: deterministic apparent tropical ephemeris for one exact UTC instant—10

Moment Essentials: deterministic apparent tropical ephemeris for one exact UTC instant—10 bodies, signs, motion, lunar phase, major aspects, provenance, and audited error bounds.

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Claim this listing
40000 (raw units)
price
4
calls / 30d
2
unique payers
2026-08-30
updated

Provider

ephemeris.561.group · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x42F72C0a340A4A55C082Fe42483e87691D2bff64",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "40000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "pathParams": {
          "date": "2026-08-28"
        },
        "queryParams": {},
        "type": "http"
      },
      "output": {
        "example": {
          "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"
        },
        "type": "json"
      }
    },
    "routeTemplate": "/v1/ephemeris/moment/:date",
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "pathParams": {
              "properties": {
                "date": {
                  "description": "Exact ISO-8601 UTC date or instant, e.g. 2026-07-21T00:00:00Z.",
                  "type": "string"
                }
              },
              "required": [
                "date"
              ],
              "type": "object"
            },
            "queryParams": {
              "properties": {},
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "properties": {
                "accuracy": {
                  "type": "object"
                },
                "aspects": {
                  "type": "array"
                },
                "bodies": {
                  "type": "object"
                },
                "frame": {
                  "type": "string"
                },
                "lunarPhase": {
                  "type": "object"
                },
                "provenance": {
                  "type": "object"
                },
                "time": {
                  "type": "string"
                }
              },
              "required": [
                "time",
                "frame",
                "bodies",
                "lunarPhase",
                "aspects",
                "provenance",
                "accuracy"
              ],
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

Use it

curl

curl "https://ephemeris.561.group/v1/ephemeris/moment/:date"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://ephemeris.561.group/v1/ephemeris/moment/:date");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://ephemeris.561.group/v1/ephemeris/moment/:date")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/4333.json, and this resource appears in /discovery/resources and /discovery/search.