curl --request POST \
  --url https://api.iotools.cloud/v1/tool/ipv4-subnet-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "address": "192.168.1.100",
  "prefix": "24"
}
'

{
  "tool": "ipv4-subnet-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "result": [
      {
        "property": "Network Address",
        "value": "192.168.1.0"
      },
      {
        "property": "Broadcast Address",
        "value": "192.168.1.255"
      },
      {
        "property": "Subnet Mask",
        "value": "255.255.255.0"
      },
      {
        "property": "Wildcard Mask",
        "value": "0.0.0.255"
      },
      {
        "property": "CIDR Notation",
        "value": "192.168.1.0/24"
      },
      {
        "property": "Usable Host Range",
        "value": "192.168.1.1 - 192.168.1.254"
      },
      {
        "property": "Total Addresses",
        "value": "256"
      },
      {
        "property": "Usable Hosts",
        "value": "254"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}