curl --request POST \
  --url https://api.iotools.cloud/v1/tool/ipv6-expander \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "address": "2001:db8::1"
}
'

{
  "tool": "ipv6-expander",
  "tool_version": "1.0.1",
  "outputs": {
    "expanded": "2001:0db8:0000:0000:0000:0000:0000:0001",
    "compressed": "2001:db8::1"
  },
  "credits_used": 3,
  "credits_remaining": null
}