curl --request POST \
  --url https://api.iotools.cloud/v1/tool/factor-of-safety-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "strength": "250",
  "workingStress": "100",
  "application": "general-mechanical"
}
'

{
  "tool": "factor-of-safety-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "results": [
      {
        "metric": "Factor of Safety",
        "value": "2.500"
      },
      {
        "metric": "Verdict",
        "value": "Capacity exceeds demand (FOS > 1) — the required margin still depends on your code and application."
      },
      {
        "metric": "Compared to General mechanical design (static load)",
        "value": "Within the typical 1.500–2.500 range for general mechanical design (static load)."
      },
      {
        "metric": "Note",
        "value": "A broad guide only, not a code requirement — verify against your governing design standard. Don't mix ultimate capacity with service demand, or compare factored and unfactored values."
      }
    ]
  },
  "credits_used": 5,
  "credits_remaining": null
}