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geo402 Great-Circle Distance
x402
geo402 Great-Circle Distance is a paid API for AI agents from 69.67.172.228.sslip.io, paid per call via x402, $0.001/call, status down (last checked 2026-09-15).
Calculates the great-circle (shortest path) distance between two geographic coordinates, returning the result in the requested unit.
Price / call$0.001
Success—
StatusDown
How this service works
Pay-per-call geolocation utility for AI agents: geocoding, reverse geocoding, timezone lookup, and great-circle distance. No API key, no subscription — agents pay per request via x402 (Base/USDC) or MPP (Tempo/pathUSD).
Output
Returns the computed great-circle (shortest spherical path) distance between the two provided coordinate pairs, expressed in the requested unit (e.g., kilometers or miles). The response is a numeric distance value along with the unit.
Example use cases
Flight path distance estimation
“How far is it in kilometers from Sydney (coordinates -33.8688, 151.2093) to Tokyo (35.6762, 139.6503) as the crow flies? I want to estimate the flight distance for a route planning tool.”
Nearest warehouse distance check
“Can you calculate the straight-line distance in miles between my warehouse at 41.8781, -87.6298 in Chicago and a customer location at 29.7604, -95.3698 in Houston? I need to figure out which distribution center is closest.”
Delivery radius eligibility check
“I have a restaurant at coordinates 48.8566, 2.3522 in Paris and a customer at 48.9021, 2.4186 — can you tell me the great-circle distance between them in kilometers so I can check if they fall within our 10 km delivery zone?”
Technical details
Endpoint
GEThttps://69.67.172.228.sslip.io/v1/distanceWhen to prefer
Use this endpoint when you need a fast, pay-per-call great-circle distance computation between two GPS coordinate pairs without committing to a subscription or obtaining an API key. Ideal for AI agents that need occasional or on-demand geospatial distance calculations and support x402 or MPP micropayment protocols (Base/USDC or Tempo/pathUSD).
Side effects
- Missing required parameters (lat1, lat2, lon1, lon2) returns a 400 error
- Invalid non-numeric coordinate values return a validation error
- Coordinates out of valid range (latitude outside -90 to 90, longitude outside -180 to 180) may return an error
- Payment not included or insufficient USDC returns a 402 Payment Required response
- Invalid or unsupported unit string may return an error or default to a standard unit
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| lat1required | number | Start latitude in decimal degrees. |
| lat2required | number | Destination latitude in decimal degrees. |
| lon1required | number | Start longitude in decimal degrees. |
| lon2required | number | Destination longitude in decimal degrees. |
| unit | string | Distance unit: kilometers, miles, meters, or nautical miles. |
Tags
x402
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