billing.grace_period_warning

project_id is always null for billing events. Fires once per past-due cycle, 7 days before lockdown.

When this fires

The creator's account hits day 53 of the 60-day past-due window — exactly 7 days from the automatic lockdown.

Required ability

billing:read — token must carry this at mint time to subscribe an endpoint to this event.

Payload

{
  "id": "evt_01HX...",
  "type": "billing.grace_period_warning",
  "created_at": "2026-05-11T08:00:00Z",
  "api_version": "2026-05-01",
  "project_id": null,
  "data": {
    "creator_id": "cre_01HX...",
    "past_due_since": "2026-03-19T00:00:00Z",
    "days_until_lockdown": 7
  }
}

Field reference

Field	Type	Notes
`id`	string ULID	Unique event id, prefixed `evt_`. Use for idempotent processing.
`type`	string	Always `billing.grace_period_warning` for this event.
`created_at`	ISO 8601 timestamp	Server-side emission time.
`api_version`	string	Webhook API contract version.
`project_id`	null	Always `null` — account-level event.
`data.creator_id`	string ULID	Creator approaching lockdown.
`data.past_due_since`	ISO 8601 timestamp	When the past-due state began.
`data.days_until_lockdown`	integer	Always `7` for this event.

Caveats

Each past-due cycle produces at most one billing.grace_period_warning. If the account recovers and re-enters past_due later, a new cycle and a new warning may issue.
The earlier 30-day and 60-day cadence touchpoints are handled and surface as MemberPass dashboard notifications, not webhook events.

billing.payment_failed — the chain of failed collections leading here.
billing.account_locked — fires 7 days after this event if recovery doesn't happen.
Billing events overview — back to family overview.