curl --request POST \
  --url https://api.iotools.cloud/v1/tool/charge-converter \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "value": "1",
  "fromUnit": "coulomb",
  "precision": "6"
}
'

{
  "tool": "charge-converter",
  "tool_version": "1.0.1",
  "outputs": {
    "table": [
      {
        "unit": "Coulomb (C)",
        "value": "1"
      },
      {
        "unit": "Millicoulomb (mC)",
        "value": "1000"
      },
      {
        "unit": "Microcoulomb (µC)",
        "value": "1000000"
      },
      {
        "unit": "Nanocoulomb (nC)",
        "value": "1000000000"
      },
      {
        "unit": "Picocoulomb (pC)",
        "value": "1000000000000"
      },
      {
        "unit": "Kilocoulomb (kC)",
        "value": "0.001"
      },
      {
        "unit": "Megacoulomb (MC)",
        "value": "0.000001"
      },
      {
        "unit": "Elementary Charge (e)",
        "value": "6.241509e+18"
      },
      {
        "unit": "Faraday (F)",
        "value": "0.00001"
      },
      {
        "unit": "Statcoulomb (statC)",
        "value": "2997924580"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}