curl --request POST \
  --url https://api.iotools.cloud/v1/tool/biological-age-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "age": "35",
  "restingHeartRate": "50-60",
  "exerciseFrequency": "active",
  "bloodPressure": "optimal",
  "bmiCategory": "normal",
  "dietQuality": "excellent",
  "waterIntake": "excellent",
  "sleep": "7-8",
  "smokingStatus": "never",
  "alcoholConsumption": "none",
  "stressLevel": "low",
  "socialConnections": "strong",
  "mentalStimulation": "high"
}
'

{
  "tool": "biological-age-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "results": [
      {
        "metric": "Chronological Age",
        "value": "35 years"
      },
      {
        "metric": "Estimated Biological Age",
        "value": "15 years"
      },
      {
        "metric": "Difference",
        "value": "20 years younger than your age"
      },
      {
        "metric": "Cardiovascular & Fitness",
        "value": "6 yr younger"
      },
      {
        "metric": "Metabolic & Body",
        "value": "5 yr younger"
      },
      {
        "metric": "Lifestyle & Recovery",
        "value": "3 yr younger"
      },
      {
        "metric": "Mental & Social",
        "value": "6 yr younger"
      }
    ],
    "focus": "All four dimensions are net-neutral or better — keep up your current habits."
  },
  "credits_used": 3,
  "credits_remaining": null
}