# Send message APIs

Complete REST API documentation for sending WhatsApp messages.
Before making requests, ensure you have configured [authentication](/products/whatsapp/enterprise-documentation/developer-documentation/authentication).

- [Send a message](/products/whatsapp/enterprise-documentation/developer-documentation/api-references/send-message-apis/send) — send a utility template message
- [Send an OTP message](/products/whatsapp/enterprise-documentation/developer-documentation/api-references/send-message-apis/send-otp) — send an authentication template OTP