curl --request POST \
  --url https://api.iotools.cloud/v1/tool/sharpe-ratio-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "mode": "summary",
  "portfolioReturn": "12",
  "riskFreeRate": "3",
  "stdDev": "15"
}
'

{
  "tool": "sharpe-ratio-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "summary": [
      {
        "metric": "Input Mode",
        "value": "Summary Statistics"
      },
      {
        "metric": "Portfolio Annual Return",
        "value": "12.00%"
      },
      {
        "metric": "Risk-Free Rate",
        "value": "3.00%"
      },
      {
        "metric": "Standard Deviation",
        "value": "15.00%"
      },
      {
        "metric": "Excess Return",
        "value": "+9.00%"
      },
      {
        "metric": "Sharpe Ratio",
        "value": "0.60"
      },
      {
        "metric": "Performance Rating",
        "value": "Sub-optimal"
      }
    ]
  },
  "credits_used": 5,
  "credits_remaining": null
}