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.
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 headerMachine-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.