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ForgeMesh Distance Calculator
x402
ForgeMesh Distance Calculator is a paid API for AI agents from x402.forgemesh.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Calculates great-circle (haversine) distance between two geographic coordinates in km, miles, and nautical miles, plus the initial compass bearing
Price / call$0.001
Success—
StatusUnknown
How this service works
Distance calculator API: great-circle (haversine) distance between two coordinates in km, miles, and nautical miles, plus initial compass bearing. Deterministic and auditable — cheaper than burning reasoning tokens, zero arithmetic-hallucination risk, and the result can be cited. For logistics, travel, delivery, and geo agents. Pairs with /geocode-city for name inputs.
Output
Returns the great-circle distance between the two coordinate pairs in three units (kilometers, miles, nautical miles) plus the initial compass bearing in degrees — fully deterministic and citable, with no arithmetic approximation.
Example use cases
Example prompt
“What's the straight-line distance and initial compass bearing between coordinates 40.7128° N, 74.0060° W (New York) and 51.5074° N, 0.1278° W (London)? Give me the result in km, miles, and nautical miles.”
Technical details
Endpoint
POSThttps://x402.forgemesh.io/distance-betweenWhen to prefer
Use this endpoint when you need a fast, deterministic, auditable great-circle distance computation between two known coordinate pairs — especially in logistics, delivery routing, travel estimation, or any context where arithmetic hallucination from LLM reasoning would be unacceptable. Pair with the /geocode-city sibling endpoint when starting from city names rather than raw coordinates. Prefer over LLM self-computation whenever citability or correctness guarantees matter.
Side effects
- Missing or non-numeric lat/lon values return a validation error
- Coordinates out of valid range (lat beyond ±90, lon beyond ±180) may return an error or incorrect result
- Identical input coordinates return zero distance and undefined or arbitrary bearing
- Payment failure or insufficient USDC balance blocks the call with a 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| lat1 | string | |
| lat2 | string | |
| lon1 | string | |
| lon2 | string |
Output
Schema · Response
{
"type": "json",
"example": {
"km": 2281.55,
"miles": 1417.7,
"initial_bearing_deg": 51.5
}
}Tags
x402
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