member.joined

Always follows subscription.created. For trials, see member.trial_joined.

When this fires

A paid subscriber gains access to the project — either through a successful checkout, an access-code redemption against a paid plan, or a re-join after churn.

Required ability

project-user:view-any — token must carry this at mint time to subscribe an endpoint to this event.

Payload

{
  "id": "evt_01HX...",
  "type": "member.joined",
  "created_at": "2026-05-18T10:05:00Z",
  "api_version": "2026-05-01",
  "project_id": "prj_01HX...",
  "data": {
    "subscription_id": "sub_01HX...",
    "plan_id": "pln_01HX...",
    "subscriber_id": "usr_01HX...",
    "project_id": "prj_01HX...",
    "access_code": null
  }
}

Field reference

Field	Type	Notes
`id`	string ULID	Unique event id, prefixed `evt_`. Use for idempotent processing.
`type`	string	Always `member.joined` for this event.
`created_at`	ISO 8601 timestamp	Server-side emission time.
`api_version`	string	Webhook API contract version.
`project_id`	string ULID	Project this event belongs to.
`data.subscription_id`	string ULID	Subscription that triggered the join.
`data.plan_id`	string ULID	Plan the subscription is on.
`data.subscriber_id`	string ULID	Subscriber's project-scoped user id.
`data.project_id`	string ULID	Mirrors top-level `project_id`.
`data.access_code`	string \| null	Masked code (last 5 chars only) when redemption was the trigger.

Caveats

For trials, member.trial_joined fires instead of member.joined.
Resource-level grants emit separate member.resource_added events as the dispatcher processes each invite.

subscription.created — always precedes.
member.trial_joined — trial counterpart.
Member events overview — back to family overview.