curl --request POST \
  --url https://api.iotools.cloud/v1/tool/voltage-converter \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "value": "1",
  "fromUnit": "volt",
  "precision": "4"
}
'

{
  "tool": "voltage-converter",
  "tool_version": "1.0.1",
  "outputs": {
    "table": [
      {
        "unit": "Volt (V)",
        "value": "1"
      },
      {
        "unit": "Millivolt (mV)",
        "value": "1000"
      },
      {
        "unit": "Microvolt (µV)",
        "value": "1000000"
      },
      {
        "unit": "Nanovolt (nV)",
        "value": "1000000000"
      },
      {
        "unit": "Picovolt (pV)",
        "value": "1000000000000"
      },
      {
        "unit": "Kilovolt (kV)",
        "value": "0.001"
      },
      {
        "unit": "Megavolt (MV)",
        "value": "0"
      },
      {
        "unit": "Gigavolt (GV)",
        "value": "0"
      },
      {
        "unit": "Statvolt (statV)",
        "value": "0.0033"
      },
      {
        "unit": "Abvolt (abV)",
        "value": "100000000"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}