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2s.io Sky Watch — Integrated Sky Digest
x402
2s.io Sky Watch — Integrated Sky Digest is a paid API for AI agents from 2s.io, paid per call via x402, $0.00288/call, status unknown (last checked 2026-09-14).
Returns a synthesized sky digest for a given lat/lon: sun/moon almanac, visible naked-eye planets above the horizon, near-Earth asteroid close approaches for the next 7 days, and live ISS position with visibility check.
Price / call$0.00288
Success—
StatusUnknown
How this service works
One call → what's notable in YOUR sky right now, for a lat/lon. Synthesizes three sources: (1) the live almanac — sun up/down, moon phase + illumination, and which of the 7 naked-eye planets are currently above your horizon with their altitude/azimuth/magnitude; (2) near-Earth asteroid close approaches over the next 7 days (designation, date, distance in lunar distances); and (3) the ISS — its current sub-point, and whether it is above your horizon right now with look angles. Each section reports found/error independently. The "is it dark, what's up, anything passing" digest for stargazers and astrophotographers. For the raw almanac alone see /api/space/sky-tonight.
Output
A structured digest with three independent sections: (1) almanac — sun rise/set, moon phase and illumination percentage, and a list of naked-eye planets currently above the horizon with altitude, azimuth, and magnitude; (2) asteroid close approaches — list of near-Earth objects over the next 7 days with designation, closest approach date, and distance in lunar distances; (3) ISS — current ground sub-point coordinates and whether it is presently above the observer's horizon with look angles (azimuth, elevation). Each section reports success or error independently.
Example use cases
Example prompt
“What's worth looking at in the sky right now from latitude 37.77 and longitude -122.42 — what planets are up, is the ISS visible, and are there any asteroid flybys this week?”
Technical details
Endpoint
GEThttps://2s.io/api/space/skywatchWhen to prefer
Use this endpoint when you need a single, synthesized sky overview combining planets, moon, sun, ISS, and asteroid data for a specific observer location — rather than calling separate astronomy APIs. Prefer /api/space/sky-tonight if you only need the raw almanac without ISS or asteroid data.
Side effects
- Missing lat or lon query parameters returns an error for those sections
- Invalid lat/lon values outside -90/90 and -180/180 range cause validation failure
- Upstream NASA or ISS data source temporarily unavailable — affected section reports error while others succeed
- Extreme observer elevations may produce edge-case horizon calculations
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"lat": 37.77,
"lon": -122.42,
"altitudeM": 0
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
{
"data": {
"at": "2026-06-10T04:30:03.400Z",
"iss": {
"look": {
"rangeKm": 6392.18,
"azimuthDeg": 261.71,
"aboveHorizon": false,
"elevationDeg": -25.74
},
"error": null,
"found": true,
"geodetic": {
"latitude": 13.08805,
"longitude": 178.12608,
"altitudeKm": 413
},
"aboveHorizon": false
},
"sky": {
"sun": {
"nextSet": "2026-06-11T03:31:13.046Z",
"nextRise": "2026-06-10T12:47:21.676Z",
"altitudeDeg": -9.82,
"aboveHorizon": false
},
"moon": {
"phaseName": "Last Quarter",
"altitudeDeg": -43.26,
"aboveHorizon": false,
"illuminationPercent": 31.47
},
"isDark": false,
"planetsUp": [
{
"name": "Mercury",
"magnitude": 0.04,
"azimuthDeg": 295.08,
"altitudeDeg": 7.98
},
{
"name": "Venus",
"magnitude": -3.99,
"azimuthDeg": 285.75,
"altitudeDeg": 17.59
},
{
"name": "Jupiter",
"magnitude": -1.85,
"azimuthDeg": 284.82,
"altitudeDeg": 16.21
}
]
},
"sources": [
{
"url": "https://github.com/cosinekitty/astronomy",
"license": "MIT — computed locally, no external data.",
"provider": "astronomy-engine (computed; VSOP87 / NOVAS-derived)"
},
{
"url": "https://ssd-api.jpl.nasa.gov/doc/cad.html",
"license": "Public domain (NASA/JPL-Caltech).",
"provider": "NASA JPL Close-Approach Data (CAD) API"
},
{
"url": "https://celestrak.org/NORAD/elements/",
"license": "Public-domain orbital data (US Space Force / 18 SDS, redistributed by Celestrak).",
"provider": "Celestrak GP element sets + SGP4 propagation (satellite.js)"
}
],
"observer": {
"lat": 37.77,
"lon": -122.42,
"altitudeM": 0
},
"closeApproaches": {
"count": 3,
"error": null,
"found": true,
"approaches": [
{
"date": "2026-Jun-10 10:01",
"distanceLd": 0.73,
"designation": "2026 LB1",
"relativeVelocityKmS": 3.65438132129752
},
{
"date": "2026-Jun-16 05:22",
"distanceLd": 3.13,
"designation": "2026 LV",
"relativeVelocityKmS": 5.62527327442124
},
{
"date": "2026-Jun-12 18:59",
"distanceLd": 16.01,
"designation": "530520",
"relativeVelocityKmS": 14.5695296473862
}
]
}
},
"meta": {
"cost": {
"usd": 0.00288,
"tier": 0
},
"caller": "x402",
"version": null,
"endpoint": "space.skywatch",
"settlement": {
"txHash": "0x5ef835b1e99b1d194a0d599092e9e899180912a32908e51ff1d9c61b704b5c8e",
"network": "eip155:8453",
"success": true
}
}
}Tags
x402
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