# WhatsApp Authentication

This allows you to send WhatsApp authentication template messages to a single mobile number per request with fallback to SMS as an option if the recipient cannot be reached via WhatsApp within the message lifetime. <br><br>Promotexter `/whatsapp/send` API for authentication messages utilizes Meta's WhatsApp Cloud API.

 - [POST /whatsapp/send‌](https://promotexter-api.redocly.app/api/whatsapp-authentication/sendwhatsappauthentication.md): Send a WhatsApp authentication template message using Meta-compatible payload structure and optionally enables SMS fallback when WhatsApp delivery fails. WhatsApp template content is not automatically