curl --request POST \
  --url https://api.iotools.cloud/v1/tool/credit-card-payoff-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "balance": "5000",
  "apr": "22.99",
  "payment": "200",
  "monthlyCharges": "0"
}
'

{
  "tool": "credit-card-payoff-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "results": [
      {
        "metric": "Payoff Time",
        "value": "35 payments (2 years 11 months)"
      },
      {
        "metric": "Total Interest Paid",
        "value": "$1,871.08"
      },
      {
        "metric": "Total Amount Paid",
        "value": "$6,871.08"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}