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Spherical Route Great-Circle Leg Bearings
x402
Spherical Route Great-Circle Leg Bearings is a paid API for AI agents from detect.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-11-04).
Computes the great-circle arc length and initial departure bearing for each leg of a multi-point spherical route.
Price / call$0.003
Success—
StatusUnknown
How this service works
Compute spherical route lengths and each departure bearing.
Output
Returns an artifact containing per-leg great-circle arc lengths (in the same units as the input radius) and the initial departure bearing (in degrees) for each consecutive pair of waypoints along the route, along with a claim object for verification.
Example use cases
Multi-city flight route analysis
“I have a 5-city flight itinerary through Paris, London, New York, Tokyo, and Sydney — can you compute the great-circle distance and initial departure bearing for each leg of that route, treating Earth as a sphere of radius 6371 km?”
Maritime voyage leg planning
“Plan out the per-leg arc lengths and headings for a ship sailing from [51.5, 0.12] to [38.7, -9.14] to [35.9, 14.5] on a sphere of radius 6371 km so I can brief the navigator on each leg's bearing and distance.”
Satellite orbit segment metrics
“For a satellite passing over ground stations at [28.5, -80.6], [51.9, 15.5], and [35.7, 139.7], compute the arc length and departure bearing for each leg assuming a sphere of radius 6771 km — that's Earth's radius plus 400 km altitude.”
Technical details
Endpoint
POSThttps://detect.halowerk.com/v1/F-TD2000-GEO-INDUSTRY-B001/spherical-route-great-circle-leg-bearings?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need precise great-circle leg-by-leg bearing and arc length decomposition for a multi-waypoint route on any sphere (Earth, other planetary bodies, or custom radius). Ideal when you need both distance and initial heading per segment in a single call, rather than just point-to-point distance. Well-suited for aviation, maritime, orbital, or geodesic planning workflows that handle sequences of 2–64 waypoints.
Side effects
- Fewer than 2 waypoints provided — minimum is 2 points to form at least one leg
- Waypoint arrays with other than exactly 2 elements (not [lat, lon] pairs)
- Radius outside allowed range (1 to 10,000,000) causes validation error
- More than 64 waypoints submitted — exceeds maxItems limit
- Coordinate values outside the allowed range (-1,000,000 to 1,000,000)
- Missing required fields sphereRoute.data.points or sphereRoute.data.radius returns schema error
- Payment failure or insufficient USDC balance returns 402
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| artifact | object |
Tags
x402
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