curl --request POST \
  --url https://api.iotools.cloud/v1/tool/golden-section-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "start": "0",
  "end": "100",
  "precision": "4"
}
'

{
  "tool": "golden-section-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "results": [
      {
        "metric": "Interval length",
        "value": "100"
      },
      {
        "metric": "Golden-section point (nearer start)",
        "value": "38.1966"
      },
      {
        "metric": "Golden-section point (nearer end)",
        "value": "61.8034"
      },
      {
        "metric": "Shorter segment length",
        "value": "38.1966"
      },
      {
        "metric": "Longer segment length",
        "value": "61.8034"
      },
      {
        "metric": "Golden ratio (φ)",
        "value": "1.618"
      }
    ]
  },
  "credits_used": 5,
  "credits_remaining": null
}