Webex Connect sandbox mode offer the following APIs for SMS channel:
- Send SMS API for sending an SMS message
- Retrieve SMS Status API to retrieve the delivery status of a message sent using Webex Connect
This apart we offer a NodeJS SDK for sending SMS messages. You can access the SDK on npmjs portal here.
Webex Connect sandbox mode currently supports key based authentication using Service Key. JWT Authentication that's supported as part of the production accounts isn't available in sandbox mode at the moment.