curl --request POST \
  --url https://api.iotools.cloud/v1/tool/geo-distance-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "latA": "40.7128",
  "lonA": "-74.0060",
  "latB": "51.5074",
  "lonB": "-0.1278",
  "formula": "haversine"
}
'

{
  "tool": "geo-distance-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "result": [
      {
        "unit": "Kilometers",
        "value": "5570.222 km"
      },
      {
        "unit": "Miles",
        "value": "3461.175 mi"
      },
      {
        "unit": "Nautical miles",
        "value": "3007.680 nmi"
      },
      {
        "unit": "Meters",
        "value": "5570222.2 m"
      },
      {
        "unit": "Feet",
        "value": "18275007.7 ft"
      },
      {
        "unit": "Initial bearing",
        "value": "51.21° (NE)"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}