Send an approved WhatsApp Business template message to one or more recipients. Identify the template with event, and supply its variables per recipient by section: HEADER, BODY and BUTTONS.

sender is the WhatsApp Business number the template is sent from; it defaults to the stream's sender. A variable the template declares but you leave out is sent as a blank space, so the message still goes out — check your variables.

Response. HTTP 200 with a task_id and one entry per message. status is false when any message failed: failed entries come first and carry error (hex code) and details; accepted entries carry message_uuid (and conversation_uuid on two-way channels). Match entries by internal_id. Final delivery status is sent asynchronously to your configured webhook.

Authentication: stream token in the Authorization header (see Authentication in the API Overview).

{
  "event": "order_confirmation",
  "recipients": [
    {
      "internal_id": "1001",
      "recipient_phone": "12125551235",
      "template_variables": {
        "BODY": {
          "1": "John",
          "2": "4821"
        },
        "HEADER": {
          "1": "John"
        }
      }
    }
  ],
  "sender": "12125551234"
}

{
  "messages": [
    {
      "conversation_uuid": "e2a489db-bb8a-4f51-9692-726153599c57",
      "internal_id": "1001",
      "message_uuid": "a61e5bfe-c82b-448a-815b-32de8bf22089"
    }
  ],
  "status": true,
  "task_id": "ca550f7e-9eb5-45b3-9830-e82b407ede02"
}