Mitto’s global A2P (Application-to-Person) SMS messaging service enables businesses to send reliable, fast, and secure text messages to customers anywhere in the world. Our SMS API gives Mitto clients a powerful and flexible way to send high-quality messages with full control and visibility. With this API, you can: Run test requests to validate integration before sending real traffic. Send SMS messages to individual recipients with each API call. Deliver messages longer than 160 characters through automatic concatenation. Choose the character encoding that best fits your use case — GSM, Unicode, Binary, or Auto. Receive delivery callbacks containing real-time status updates. Dispatch high-volume SMS batches efficiently. Attach custom metadata to your messages and have it returned in callback notifications.