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Geo Distance (Haversine)
x402
Geo Distance (Haversine) is a paid API for AI agents from x402.agentindex.world, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-30).
Computes the great-circle distance between two geographic coordinates using the haversine formula, returning the result in km, miles, or nautical miles.
Price / call$0.001
Success—
StatusUnknown
How this service works
Great-circle distance between two lat/lon points (haversine formula). Returns km, mi or nm.
Output
A numeric distance value between the two specified coordinates expressed in the requested unit (km, mi, or nm), computed via the haversine great-circle formula.
Example use cases
Flight distance estimation
“How far is it in kilometers from New York (40.7128, -74.0060) to Los Angeles (34.0522, -118.2437) as the crow flies?”
Nautical route planning
“What's the great-circle distance in nautical miles between Sydney (−33.8688, 151.2093) and Auckland (−36.8485, 174.7633)?”
Delivery radius check
“Calculate the straight-line distance in kilometers between my warehouse at 52.5200, 13.4050 and a customer location at 53.5511, 9.9937 — I need to see if they're within our 200 km delivery zone.”
Technical details
Endpoint
GEThttps://x402.agentindex.world/geo/distance?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, cheap, single-call great-circle distance between two coordinate pairs without needing routing, road distances, or map tiles. Ideal for filtering, proximity checks, or any computation that only requires straight-line geographic distance.
Side effects
- Latitude out of range [-90, 90] returns a validation error
- Longitude out of range [-180, 180] returns a validation error
- Invalid unit string (not km, mi, or nm) returns a validation error
- Missing required lat1/lon1/lat2/lon2 parameters causes a 422 error
- Payment failure (insufficient USDC balance) returns 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| lat1 | number | |
| lat2 | number | |
| lon1 | number | |
| lon2 | number | |
| unit | string |
Output
Schema · Response
{
"type": "json",
"example": {
"unit": "km",
"distance": 343.5577
}
}Tags
x402
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