curl --request POST \
  --url https://api.iotools.cloud/v1/tool/cpm-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "solveFor": "cost",
  "campaignCost": "500",
  "cpm": "5",
  "impressions": "100000",
  "campaignDays": "30"
}
'

{
  "tool": "cpm-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "resultTable": [
      {
        "metric": "Campaign Cost",
        "value": "$500.00"
      },
      {
        "metric": "CPM",
        "value": "$5.00"
      },
      {
        "metric": "Impressions",
        "value": "100,000"
      },
      {
        "metric": "Cost per Impression",
        "value": "$0.0050"
      },
      {
        "metric": "Impressions per Dollar",
        "value": "200.00"
      },
      {
        "metric": "Daily Impressions (30-day campaign)",
        "value": "3,333"
      },
      {
        "metric": "Daily Budget (30-day campaign)",
        "value": "$16.67"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}