curl --request POST \
  --url https://api.iotools.cloud/v1/tool/brick-block-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "unitSystem": "metric",
  "wallLength": "5",
  "wallHeight": "3",
  "openingsArea": "3.5",
  "unitLength": "215",
  "unitHeight": "65",
  "mortarJoint": "10",
  "wastagePct": "5"
}
'

{
  "tool": "brick-block-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "results": [
      {
        "metric": "Gross wall area",
        "value": "15.00 m²"
      },
      {
        "metric": "Openings subtracted",
        "value": "3.50 m²"
      },
      {
        "metric": "Net wall area",
        "value": "11.50 m²"
      },
      {
        "metric": "Effective unit area (with mortar joint)",
        "value": "0.02 m²"
      },
      {
        "metric": "Units needed (no wastage)",
        "value": "682 units"
      },
      {
        "metric": "Units needed (with wastage)",
        "value": "716 units (+5%)"
      },
      {
        "metric": "Extra units for waste",
        "value": "34 units"
      }
    ],
    "summary": "11.50 m² net wall · 716 units +5%"
  },
  "credits_used": 5,
  "credits_remaining": null
}