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2s.io Sunrise/Sunset Solar Times Calculator
x402
2s.io Sunrise/Sunset Solar Times Calculator is a paid API for AI agents from 2s.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Computes sunrise, sunset, solar noon, and twilight times (civil, nautical, astronomical) for a geographic coordinate and date, returned in UTC ISO 8601
Price / call$0.001
Success—
StatusUnknown
How this service works
Compute sunrise, sunset, solar noon, and civil/nautical/astronomical twilight times for a coordinate + date. Query: lat (-90..90), lon (-180..180), date (YYYY-MM-DD). All times returned as ISO 8601 UTC. At high latitudes near solstices an event may not occur (polar day/night) — those fields return null and a note is included. dayLengthMinutes is the sunrise→sunset interval.
Output
Returns ISO 8601 UTC timestamps for sunrise, sunset, solar noon, civil twilight start/end, nautical twilight start/end, and astronomical twilight start/end, plus dayLengthMinutes (sunrise-to-sunset interval). At extreme latitudes near solstices, events that don't occur (polar day/night) return null with an explanatory note.
Example use cases
Example prompt
“What time does the sun rise and set in Reykjavik (lat 64.1355, lon -21.8954) on December 21, 2025, and how long is the day? Also give me civil and nautical twilight times.”
Technical details
Endpoint
GEThttps://2s.io/api/sunrise/computeWhen to prefer
Use this endpoint when you need precise, programmatically computed solar event times (sunrise, sunset, twilight phases) for any global coordinate and date — especially when you need all twilight categories (civil, nautical, astronomical) in a single call, or when handling edge cases like polar regions where events may not occur.
Side effects
- Invalid latitude outside -90..90 returns validation error
- Invalid longitude outside -180..180 returns validation error
- Date not in YYYY-MM-DD format returns parse error
- At high latitudes near solstice, some or all events return null with polar day/night note
- Missing required parameters (lat, lon, date) returns 400-level error
- Payment not included or insufficient results in 402 Payment Required
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"lat": 40.7128,
"lon": -74.006,
"date": "2025-06-21"
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
{
"data": {
"notes": [],
"query": {
"date": "2025-06-21",
"latitude": 40.7128,
"longitude": -74.006
},
"source": {
"note": "Times are computed locally — no upstream call.",
"algorithm": "NOAA Solar Calculator (Meeus, Astronomical Algorithms 2nd ed.)"
},
"sunset": "2025-06-22T00:30:00.000Z",
"sunrise": "2025-06-21T09:25:00.000Z",
"solarNoon": "2025-06-21T16:57:00.000Z",
"civilTwilightEnd": "2025-06-22T01:04:00.000Z",
"dayLengthMinutes": 905,
"civilTwilightBegin": "2025-06-21T08:51:00.000Z",
"nauticalTwilightEnd": "2025-06-22T01:46:00.000Z",
"nauticalTwilightBegin": "2025-06-21T08:08:00.000Z",
"astronomicalTwilightEnd": "2025-06-22T02:37:00.000Z",
"astronomicalTwilightBegin": "2025-06-21T07:18:00.000Z"
},
"meta": {
"cost": {
"usd": 0.001,
"tier": 0
},
"caller": "x402",
"version": null,
"endpoint": "sunrise.compute",
"settlement": {
"txHash": "0x0a116dfc57aac3b006440eeacbeb2bf10e7b84d6e61d568ed8e6959a20c67f0f",
"network": "eip155:8453",
"success": true
}
}
}Schema · Response
{
"type": "json",
"schema": {
"type": "object",
"required": [
"ok",
"items",
"total",
"source"
],
"properties": {
"ok": {
"enum": [
true
],
"type": "boolean"
},
"meta": {
"type": "object",
"required": [
"query"
],
"properties": {
"query": {
"type": "object",
"required": [
"latitude",
"longitude",
"date"
],
"properties": {
"date": {
"type": "string"
},
"latitude": {
"type": "number"
},
"longitude": {
"type": "number"
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"items": {
"type": "array",
"items": {
"type": "object",
"additionalProperties": {}
}
},
"total": {
"type": "integer",
"nullable": true,
"description": "Total matching rows upstream; null when unknown."
},
"source": {
"type": "object",
"required": [
"provider",
"url",
"license"
],
"properties": {
"url": {
"type": "string"
},
"license": {
"type": "string"
},
"provider": {
"type": "string"
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"example": {
"ok": true,
"meta": {
"query": {
"date": "example",
"latitude": 1,
"longitude": 1
}
},
"items": [
{}
],
"total": 1,
"source": {
"url": "example",
"license": "example",
"provider": "example"
}
}
}Tags
x402
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