curl --request POST \
  --url https://api.iotools.cloud/v1/tool/roof-pitch-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "rise": "6",
  "run": "12",
  "unit": "in"
}
'

{
  "tool": "roof-pitch-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "status": "A rise of 6 in over a run of 12 in is a 6/12 roof pitch — 26.57° from horizontal, 50% slope. Each 12 in of run needs about 13.42 in of rafter (×1.118).",
    "result": [
      {
        "property": "Roof Pitch",
        "value": "6/12"
      },
      {
        "property": "Angle",
        "value": "26.57°"
      },
      {
        "property": "Slope",
        "value": "50%"
      },
      {
        "property": "Rafter Length Multiplier",
        "value": "×1.118"
      },
      {
        "property": "Rafter Length (for your run)",
        "value": "13.42 in"
      }
    ],
    "reference": [
      {
        "pitch": "2/12",
        "angle": "9.46°",
        "notes-your-roof": "Yours is 4/12 steeper — Minimum slope for low-slope/membrane roofing"
      },
      {
        "pitch": "3/12",
        "angle": "14.04°",
        "notes-your-roof": "Yours is 3/12 steeper — Minimum slope for asphalt shingles"
      },
      {
        "pitch": "4/12",
        "angle": "18.43°",
        "notes-your-roof": "Yours is 2/12 steeper — Common on ranch-style homes"
      },
      {
        "pitch": "6/12",
        "angle": "26.57°",
        "notes-your-roof": "Same as yours — Most common residential pitch — comfortably walkable"
      },
      {
        "pitch": "9/12",
        "angle": "36.87°",
        "notes-your-roof": "Yours is 3/12 gentler — Steep — common on craftsman and A-frame styles"
      },
      {
        "pitch": "12/12",
        "angle": "45°",
        "notes-your-roof": "Yours is 6/12 gentler — 45° — very steep, chalet-style"
      }
    ]
  },
  "credits_used": 5,
  "credits_remaining": null
}