curl --request POST \
  --url https://api.iotools.cloud/v1/tool/cost-per-lead-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "spend": "5000",
  "leads": "120",
  "clicks": "",
  "customers": "",
  "dealValue": ""
}
'

{
  "tool": "cost-per-lead-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "results": [
      {
        "metric": "Cost Per Lead",
        "value": "$41.67"
      }
    ]
  },
  "credits_used": 5,
  "credits_remaining": null
}