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US Geography: Great-Circle Distance Between Two Coordinates
x402
US Geography: Great-Circle Distance Between Two Coordinates is a paid API for AI agents from geo-us.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-30).
Calculates the haversine great-circle distance between two lat/lon coordinates in km, miles, and nautical miles, plus initial bearing and geographic midpoint.
Price / call$0.02
Success—
StatusUnknown
How this service works
Great-circle (haversine) distance between two coordinates in km, miles and nautical miles, with bearing and midpoint.
Output
Returns the haversine great-circle distance in kilometers, miles, meters, and nautical miles; the initial bearing in degrees along with a compass direction string (e.g. 'NE'); and the geographic midpoint as a lat/lon object. Also includes a summary string, source attribution, and optional disclaimer or degraded-service flags.
Example use cases
Flight path distance estimation
“Can you calculate the great-circle distance between JFK Airport at 40.6413° N, 73.7781° W and Heathrow at 51.4700° N, 0.4543° W? I need it in miles and nautical miles plus the initial bearing.”
Delivery radius check for logistics
“I need to know how far it is in kilometers and miles between our warehouse at 41.8827° N, 87.6233° W and a customer at 42.3601° N, 71.0589° W, plus which compass direction they are from us.”
Geographic midpoint for meeting location
“What's the midpoint between 47.6062° N, 122.3321° W (Seattle) and 37.7749° N, 122.4194° W (San Francisco), and how many miles apart are those two cities as the crow flies?”
Technical details
Endpoint
GEThttps://geo-us.x402tookit.com/coord-distance?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, accurate geodetic distance between two arbitrary lat/lon coordinate pairs, especially when you also want bearing and midpoint data in a single call. Prefer it over geocoding-then-distance pipelines when you already have coordinates. It is purpose-built for point-to-point great-circle calculations rather than routing or driving distances.
Side effects
- Missing required query parameters (lat1, lon1, lat2, lon2) returns an error
- Out-of-range latitude (>90 or <-90) or longitude (>180 or <-180) may cause computation error
- Identical coordinates return zero distance and undefined bearing
- Payment failure via x402 protocol returns 402 status before computation
- Network timeout on the remote service returns no result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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