Payload

All webhook payloads follow a consistent top-level structure with event-specific data nested within the data object.

subscriptionIdstring

The subscription ID.

customerIdstring

The customer ID. Returns your externalId if you provided one when creating the customer, otherwise returns the Commet publicId.

addonobject

The add-on: id and name.

featureCodestring

The feature the add-on unlocked or extended.

{
  "event": "addon.deactivated",
  "timestamp": "2026-06-18T09:12:00.000Z",
  "organizationId": "org_abc123",
  "mode": "live",
  "apiVersion": "2026-06-10",
  "data": {
    "subscriptionId": "sub_1a2b3c4d",
    "customerId": "user_123",
    "addon": {
      "id": "addon_5e6f7g8h",
      "name": "Extra Storage"
    },
    "featureCode": "storage"
  }
}

When this fires

When an active add-on is deactivated — via DELETE /subscriptions/{id}/addons/{addonId} or the customer portal. The add-on stops billing at the next renewal.

customer.state_changed fires alongside it with trigger addon_deactivated.

Use it to revoke the add-on's feature in your app.