Send a broadcast now, or pass an ISO 8601 scheduledAt to schedule it. A one-click unsubscribe is always added. Returns the status and resolved audience count.
HTTP: POST /api/broadcasts/{id}/send
| Field | Type | Required | Description |
|---|---|---|---|
scheduledAt |
string |
any
Object res = mk.sendBroadcast(Map.of("id", "bct_1", "scheduledAt", "2026-07-01T15:00:00Z"));