The Merge web service APIs account for the standard actions on quotes.

You can invoke APIs in  Web Service from the following command:

Apttus_Proposal.MergeWebService.<Name of the Function>
where the name of the function is API Name and it's parameters.

You can use the Merge web service APIs to complete the following tasks:

The Salesforce API version used in CPQ SOAP APIs is upgraded to 50.0.