curl --request POST \
  --url https://api.iotools.cloud/v1/tool/gas-vs-electric-cost-comparison \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "gasUsage": "500",
  "gasUnit": "therms",
  "gasRateTherm": "1.20",
  "gasRateKwh": "0.06",
  "electricUsage": "10000",
  "electricRate": "0.16"
}
'

{
  "tool": "gas-vs-electric-cost-comparison",
  "tool_version": "1.0.1",
  "outputs": {
    "resultTable": [
      {
        "metric": "Annual cost",
        "gas": "$600.00",
        "electric": "$1,600.00"
      },
      {
        "metric": "CO2 emissions (yearly)",
        "gas": "2,651.7 kg CO₂",
        "electric": "4,170.0 kg CO₂"
      }
    ],
    "comparison": "Gas costs $1,000.00/year less and produces 1,518.3 kg CO₂/year less than the other option."
  },
  "credits_used": 3,
  "credits_remaining": null
}