billing.account_locked

project_id is always null for billing events.

When this fires

The creator's account reaches its tier's past-due lockdown — day 30 on a paid tier, day 7 on Free or an unconverted trial. New signups on my.subscriby.net/{handle} are blocked and the dashboard surfaces a lockdown banner.

Required ability

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

Payload

{
  "id": "evt_01HX...",
  "type": "billing.account_locked",
  "created_at": "2026-05-18T00:00:00Z",
  "api_version": "2026-05-01",
  "project_id": null,
  "data": {
    "creator_id": "2a91c4e7-6f38-4b52-8e0d-9c1a7b3f5d80",
    "past_due_since": "2026-04-18T00:00:00Z",
    "locked_at": "2026-05-18T00:00:00Z"
  }
}

Field reference

Field	Type	Notes
`id`	string ULID	Unique event id, prefixed `evt_`. Use for idempotent processing.
`type`	string	Always `billing.account_locked` 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 UUID	Creator that was locked.
`data.past_due_since`	ISO 8601 timestamp	When the past-due state began.
`data.locked_at`	ISO 8601 timestamp	When the lockdown took effect.

Caveats

Lockdown is reversible: a successful payment fires billing.invoice_paid and the lockdown is cleared automatically. There is no dedicated "account_unlocked" event.
Existing subscribers retain access to project resources during lockdown; only new signups are blocked.

billing.grace_period_warning — the warning that precedes it, 7 days earlier on a paid tier and 4 on Free or an unconverted trial.
billing.invoice_paid — automatic unlock signal.
Billing events overview — back to family overview.