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Vextorium Geo Distance Calculator
x402
Vextorium Geo Distance Calculator is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-15).
Calculates the straight-line geodesic distance between two geographic coordinates using the Vincenty WGS84 formula, returning distance in km, miles, and nautical miles, plus bearing, midpoint, and estimated travel times.
Price / call$0.003
Success—
StatusUnknown
How this service works
Distance between two coordinates (Vincenty geodesic on WGS84 plus great-circle), in km, miles and nautical miles, initial bearing and compass direction, midpoint and estimated time on foot, by car and by plane.
Output
A JSON object containing the straight-line distance in kilometers, miles, spherical kilometers, and nautical miles; the compass heading (e.g. 'E'); the initial bearing in degrees; the geographic midpoint as a lat/lon pair; estimated travel times by car at 80 km/h, plane at 800 km/h, and walking at 5 km/h; and a note clarifying this is not a road distance.
Example use cases
Flight distance estimation for trip planning
“How far is it in a straight line from New York (40.7128° N, 74.0060° W) to London (51.5074° N, 0.1278° W), and roughly how long would a plane take to cover that distance?”
Nautical navigation between two ports
“I need the geodesic distance in nautical miles between the port of Rotterdam (51.9225° N, 4.4792° E) and the port of Hamburg (53.5753° N, 9.9552° E), plus the initial bearing heading.”
Midpoint between two field survey sites
“Can you calculate the midpoint and straight-line distance in kilometers between survey site A at 34.0522° N, 118.2437° W and survey site B at 37.7749° N, 122.4194° W?”
Technical details
Endpoint
POSThttps://api.vextorium.com/v1/geo-distance?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, precise geodesic distance computation between two coordinate pairs without routing or road network data. It is ideal for aviation, nautical, logistics, or survey applications where straight-line (great-circle) distance and bearing matter more than driving directions. Prefer this over map-routing APIs when you need Vincenty WGS84 accuracy, travel-time estimates across multiple modes, or nautical miles output in a single pay-per-call call.
Side effects
- Missing required parameters (lat1, lon1, lat2, lon2) returns a validation error
- Out-of-range latitude/longitude values (lat outside -90 to 90, lon outside -180 to 180) may produce incorrect results or errors
- Identical coordinates for both points returns zero distance
- Non-numeric values for coordinates cause schema validation failure
- Payment failure via x402 results in 402 response and no data returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| lat1 | number | |
| lat2 | number | |
| lon1 | number | |
| lon2 | number |
Output
Schema · Response
{
"type": "json",
"example": {
"note": "Straight-line distance, not by road.",
"method": "Vincenty WGS84",
"heading": "E",
"midpoint": {
"lat": 40.939351,
"lon": -0.789164
},
"distance_km": 506.3,
"distance_miles": 314.6,
"estimated_time_h": {
"car_80kmh": 6.33,
"plane_800kmh": 1.13,
"walking_5kmh": 101.26
},
"spherical_distance_km": 505.096,
"distance_nautical_miles": 273.38,
"initial_bearing_degrees": 75.75
}
}Tags
x402
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