curl --request POST \
  --url https://api.iotools.cloud/v1/tool/bmi-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "weight": "70",
  "weightUnit": "kg",
  "height": "175",
  "heightUnit": "cm"
}
'

{
  "tool": "bmi-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "results": [
      {
        "metric": "BMI",
        "value": "22.86"
      },
      {
        "metric": "Category",
        "value": "Normal weight"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}