curl --request POST \
  --url https://api.iotools.cloud/v1/tool/section-properties-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "shape": "rectangle",
  "width": "200",
  "height": "400"
}
'

{
  "tool": "section-properties-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "results": [
      {
        "property": "Shape",
        "value": "Rectangle"
      },
      {
        "property": "Area (A)",
        "value": "80,000 mm²"
      },
      {
        "property": "Centroid",
        "value": "At the geometric center (b/2, h/2)"
      },
      {
        "property": "Moment of Inertia, x-x (Ix)",
        "value": "1,066,666,667 mm⁴"
      },
      {
        "property": "Section Modulus, x-x (Sx)",
        "value": "5,333,333 mm³"
      },
      {
        "property": "Radius of Gyration, x-x (rx)",
        "value": "115.5 mm"
      },
      {
        "property": "Moment of Inertia, y-y (Iy)",
        "value": "266,666,667 mm⁴"
      },
      {
        "property": "Section Modulus, y-y (Sy)",
        "value": "2,666,667 mm³"
      },
      {
        "property": "Radius of Gyration, y-y (ry)",
        "value": "57.74 mm"
      }
    ]
  },
  "credits_used": 5,
  "credits_remaining": null
}