curl --request POST \
  --url https://api.iotools.cloud/v1/tool/boiling-point-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "mode": "altitude",
  "altitude": "0",
  "altitudeUnit": "m",
  "precision": "2"
}
'

{
  "tool": "boiling-point-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "boilingPointC": "100.00 °C",
    "boilingPointF": "211.99 °F",
    "boilingPointK": "373.15 K",
    "pressureTable": [
      {
        "metric": "Altitude",
        "value": "0 m"
      },
      {
        "metric": "Atmospheric pressure (kPa)",
        "value": "101.3250 kPa"
      },
      {
        "metric": "Atmospheric pressure (atm)",
        "value": "1.0000 atm"
      },
      {
        "metric": "Atmospheric pressure (psi)",
        "value": "14.6959 psi"
      },
      {
        "metric": "Atmospheric pressure (mmHg)",
        "value": "760.00 mmHg"
      },
      {
        "metric": "Atmospheric pressure (bar)",
        "value": "1.0133 bar"
      },
      {
        "metric": "Shift from sea level",
        "value": "0.00 °C (0.01 °F) lower"
      }
    ],
    "notes": "Using the US Standard Atmosphere barometric formula for pressure, then the Antoine equation to solve for boiling point.\nThe Antoine equation is accurate for 1–100 °C (about 4.6–760 mmHg); results well outside that range are extrapolated and less precise."
  },
  "credits_used": 5,
  "credits_remaining": null
}