curl --request POST \
  --url https://api.iotools.cloud/v1/tool/weir-discharge-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "weirType": "rectangular",
  "head": "0.3",
  "dischargeCoefficient": "0.62",
  "crestWidth": "1.5"
}
'

{
  "tool": "weir-discharge-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "summary": [
      {
        "metric": "Weir type",
        "value": "Rectangular (full-width)"
      },
      {
        "metric": "Discharge (m³/s)",
        "value": "0.4512"
      },
      {
        "metric": "Discharge (L/s)",
        "value": "451.179"
      },
      {
        "metric": "Discharge (m³/h)",
        "value": "1624.2445"
      },
      {
        "metric": "Discharge (US gpm)",
        "value": "7151.3334"
      }
    ]
  },
  "credits_used": 5,
  "credits_remaining": null
}