curl --request POST \
  --url https://api.iotools.cloud/v1/tool/rebar-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "slabLength": "10",
  "slabWidth": "10",
  "dimensionUnit": "ft",
  "barSize": "#4",
  "spacing": "12",
  "cover": "2",
  "spacingUnit": "in",
  "layers": "single",
  "wastePercent": "10"
}
'

{
  "tool": "rebar-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "status": "20 bars of #4 rebar, 212.67 ft (64.82 m) total, weighing 142.06 lb (64.43 kg).",
    "result": [
      {
        "property": "Bar Size",
        "value": "#4 (13M)"
      },
      {
        "property": "Mat Layers",
        "value": "1"
      },
      {
        "property": "Bars — Direction A",
        "value": "10 × 9.67 ft (2.95 m) each"
      },
      {
        "property": "Bars — Direction B",
        "value": "10 × 9.67 ft (2.95 m) each"
      },
      {
        "property": "Total Bars",
        "value": "20"
      },
      {
        "property": "Total Length (before waste)",
        "value": "193.33 ft (58.93 m)"
      },
      {
        "property": "Total Length (with waste)",
        "value": "212.67 ft (64.82 m)"
      },
      {
        "property": "Total Weight",
        "value": "142.06 lb (64.43 kg)"
      }
    ]
  },
  "credits_used": 5,
  "credits_remaining": null
}