Send SMS with the REST API

POST https://www.splitsms.com/api/v1/sms/send with a Bearer key, sender, recipients, and message.

For Developers

1. 1

   Authenticate

   All requests are HTTPS JSON. Header Authorization: Bearer YOUR_API_KEY. Base URL: https://www.splitsms.com/api/v1. Use sk_test_ keys in development.

2. 2

   Send

   POST /sms/send with sender (approved Sender ID), recipients (array of international numbers without +), and message. The response includes message IDs and initial status.

3. 3

   Track delivery

   Poll GET /messages or register a webhook. Do not assume Delivered from a 200 on send — that only means SplitSMS accepted the request.