curl --request POST \
  --url https://api.iotools.cloud/v1/tool/pka-to-ka-converter \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "inputMode": "pKa",
  "pKaValue": "4.76",
  "kaValue": "1.8e-5",
  "pKbValue": "9.24",
  "kbValue": "5.6e-10"
}
'

{
  "tool": "pka-to-ka-converter",
  "tool_version": "1.0.2",
  "outputs": {
    "result": [
      {
        "quantity": "pKa",
        "value": "4.76",
        "source": "Input"
      },
      {
        "quantity": "Ka",
        "value": "1.738 × 10⁻⁵",
        "source": "Derived"
      },
      {
        "quantity": "pKb",
        "value": "9.24",
        "source": "Derived"
      },
      {
        "quantity": "Kb",
        "value": "5.754 × 10⁻¹⁰",
        "source": "Derived"
      }
    ],
    "steps": "Conjugate pair in water at 25°C: pKa + pKb = 14 (Ka × Kb = Kw = 1.0e-14).\nKa = 10^(-pKa) = 10^(-4.76) = 1.738 × 10⁻⁵\npKb = 14 - pKa = 14 - 4.76 = 9.24\nKb = 10^(-pKb) = 10^(-9.24) = 5.754 × 10⁻¹⁰"
  },
  "credits_used": 5,
  "credits_remaining": null
}