SmartSimple Web Services (SOAP) API
The legacy SOAP Web Services API, exposed per instance via a WSDL at /WS/services/UtaUpdate?wsdl (for example https://smart.smartsimple.biz/WS/services/UtaUpdate?wsdl). It predates SmartConnect - new integrations are directed to the JSON SmartConnect REST API, but the SOAP interface remains documented and supported. Endpoints are modeled against the documented per-instance service.