BSUID Support: The{whatsappNumber}path parameter has been extended to accept a polymorphic{target}identifier. You can now pass any of the following formats:
Format Example Description Phone Number 14155552671WhatsApp phone number (existing behavior) Contact ID 507f1f77bcf86cd799439011MongoDB Contact ID BSUID US.123124141512Business Solution User ID (cross-channel stable identifier) The system automatically detects the format and resolves the contact accordingly. Existing callers using phone numbers continue to work without changes.