curl --request POST \
  --url https://api.iotools.cloud/v1/tool/attendance-percentage-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "mode": "target",
  "attended": "45",
  "totalHeld": "50",
  "remainingClasses": "5",
  "targetPercent": "75"
}
'

{
  "tool": "attendance-percentage-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "summary": "You can already hit 75% — safely skip up to 5 of your remaining 5 classes.",
    "breakdown": [
      {
        "metric": "Current attendance",
        "value": "90%"
      },
      {
        "metric": "Classes remaining this term",
        "value": "5"
      },
      {
        "metric": "Classes needed from those remaining",
        "value": "0"
      },
      {
        "metric": "Safe skips remaining",
        "value": "5"
      },
      {
        "metric": "Attendance if you attend exactly the needed amount",
        "value": "81.8%"
      },
      {
        "metric": "Max possible attendance (attend all remaining)",
        "value": "90.9%"
      }
    ]
  },
  "credits_used": 5,
  "credits_remaining": null
}