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geo-midpoint
x402
geo-midpoint is a paid API for AI agents from x402.agentindex.world, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-16).
Computes the geographic (great-circle) midpoint between two latitude/longitude coordinates.
Price / call$0.001
Success—
StatusUnknown
How this service works
Geographic (great-circle) midpoint between two lat/lon points.
Output
Returns the latitude and longitude of the great-circle midpoint between the two input coordinate pairs, representing the true spherical halfway point on the Earth's surface between the two locations.
Example use cases
Equidistant meeting location finder
“My colleague is in Tokyo at 35.6762° N, 139.6503° E and I'm in Sydney at 33.8688° S, 151.2093° E — what's the great-circle midpoint between us so we can think about a neutral meeting city?”
Logistics hub placement
“We have warehouses at lat 41.8781, lon -87.6298 (Chicago) and lat 29.7604, lon -95.3698 (Houston). What's the geographic midpoint between them so we can evaluate it as a central distribution point?”
Halfway campsite planning
“I'm starting a road trip from 34.0522° N, 118.2437° W in Los Angeles and ending at 47.6062° N, 122.3321° W in Seattle — can you find the geographic midpoint so I can plan a halfway overnight stop?”
Technical details
Endpoint
GEThttps://x402.agentindex.world/geo/midpoint?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need the true spherical (great-circle) midpoint between two geographic coordinates, especially over long distances where planar approximations fail. Prefer this over simple arithmetic averaging of lat/lon values, which introduces distortion at high latitudes or over large distances.
Side effects
- Missing required parameters (lat1, lon1, lat2, lon2) result in a validation error
- Latitude values outside -90 to 90 or longitude values outside -180 to 180 are rejected
- Identical input points return the same point as the midpoint
- Antipodal points (opposite sides of the Earth) may produce an undefined or arbitrary midpoint due to great-circle ambiguity
- Payment failure via x402 protocol returns 402 status and no result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| lat1 | number | |
| lat2 | number | |
| lon1 | number | |
| lon2 | number |
Output
Schema · Response
{
"type": "json",
"example": {
"lat": 50.1918,
"lon": 1.0999
}
}Tags
x402
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