curl --request POST \
  --url https://api.iotools.cloud/v1/tool/ipv4-to-ipv6-converter \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "ipv4": "192.168.1.1"
}
'

{
  "tool": "ipv4-to-ipv6-converter",
  "tool_version": "1.0.1",
  "outputs": {
    "result": [
      {
        "type": "IPv4-Mapped IPv6 (dotted)",
        "address": "::ffff:192.168.1.1"
      },
      {
        "type": "IPv4-Mapped IPv6 (hex)",
        "address": "::ffff:c0a8:101"
      },
      {
        "type": "6to4 Prefix (2002::/16)",
        "address": "2002:c0a8:101::/48"
      },
      {
        "type": "IPv4-Compatible IPv6 (deprecated)",
        "address": "::192.168.1.1"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}