When you want to use SOAP API calls to communicate with Magento 2 you want a overview of the available Web Services. Use the following url format to get a list of all the SOAP Services:
http://www.yourwebshop.com/soap/all?wsdl_list=1
In this list you also get the wsdl_endpoint which you can use to make a SOAP Web API Calls.
For more information about SOAP in Magento 2 take a look at the Magento2 DevDocs http://devdocs.magento.com/guides/v2.0/get-started/soap/soap-web-api-calls.html
