The idea is to be able to specify the webhook endpoint per message request. So instead of account wide webhook endpoints that get called for every message, have the ability for a property in the api call for sending sms to specify an endpoint for the delivery status webhook for that specific message.

Ticket: https://app.au.intercom.com/a/inbox/nqkkwhx0/inbox/admin/100002108/conversation/200901300856673?view=List