# Message Service API

- [MessageService](/message-api/message-service-api/messageservice.md)
- [Send template message](/message-api/message-service-api/messageservice/send-template-message.md): API to send a WhatsApp templated message to recipient.
- [Send session message](/message-api/message-service-api/messageservice/send-session-message.md): Send a message to recipient on target channel, i.e. WhatsApp, SMS.
- [Error codes](/message-api/message-service-api/error-codes.md)