curl --request POST \
  --url https://api.iotools.cloud/v1/tool/pwm-duty-frequency-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "mode": "freq",
  "frequency": "1000",
  "dutyCycle": "25",
  "period": "2",
  "pulseWidth": "0.5"
}
'

{
  "tool": "pwm-duty-frequency-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "summary": [
      {
        "metric": "Frequency",
        "value": "1000 Hz"
      },
      {
        "metric": "Period",
        "value": "1 ms"
      },
      {
        "metric": "Duty Cycle",
        "value": "25.00%"
      },
      {
        "metric": "Pulse Width (High Time)",
        "value": "0.25 ms"
      },
      {
        "metric": "Pulse Low (Low Time)",
        "value": "0.75 ms"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}