A webhook with the addressBalance.updated type will receive a call when a balance of address(es) has/have been updated. Example:
# Headers
x-webhook-id: b9827a46-6ca9-4027-b318-b11293ec2728
x-webhook-timestamp: 1716975338
x-webhook-signature: v1,84Z8uQuAJ/L69HLKDG40TEQAAaFdZFiliX9rYHBCePg=
# Payload
{
"id": "d35bd911-56b5-47de-ad1a-d185aa868fcb",
"type": "addressBalance.updated",
"url": "https://webhook.site...",
"status": "enabled",
"createdAt": "2026-08-19T08:04:08.471600Z"
}