curl --request POST \
  --url https://api.iotools.cloud/v1/tool/pump-power-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "flowRate": "100",
  "flowUnit": "lpm",
  "head": "20",
  "headUnit": "m",
  "fluid": "water",
  "pumpEfficiency": "75"
}
'

{
  "tool": "pump-power-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "results": [
      {
        "property": "Volumetric flow",
        "value": "0.001667 m³/s (100 L/min)"
      },
      {
        "property": "Total head",
        "value": "20 m"
      },
      {
        "property": "Fluid density",
        "value": "998.2 kg/m³"
      },
      {
        "property": "Hydraulic power",
        "value": "0.3263 kW (0.4376 hp)"
      },
      {
        "property": "Pump efficiency",
        "value": "75%"
      },
      {
        "property": "Shaft (brake) power",
        "value": "0.4351 kW (0.5834 hp)"
      }
    ]
  },
  "credits_used": 5,
  "credits_remaining": null
}