Hello user99479,   Thank you for reaching out to Constant Contact API Developer Support. My team is here to assist outside software developers with questions about building into Constant Contact's API.   Currently, the only SMS campaign related endpoint available for the V3 API is for an SMS campaign summary report. We do not currently offer any endpoints for creating or scheduling SMS campaigns via API. I apologize for any confusion caused by the page you found in the V3 documentation and we appreciate you bringing it to our attention. Below I’m including the documentation for the SMS campaign summary report request.   GET an SMS Campaigns Summary Report: https://developer.constantcontact.com/api_reference/index.html#!/SMS_Reporting/getAllBulkSmsCampaignSummaries   Please have a look and let us know if you have any other questions!   Regards, ... View more