For a custom requirement, You would like to utilize Web Service Server connector in Boomi and would like to know how to request or purchase this connector.
Reproducing the Issue
Dell has confirmed that the web service server connector is available by default for the customer usage.
You would not be able to independently create the connection by clicking on "create component", or under 'Create' section in the Build tab.
You simply have to create a new process and configure the start shape with connection type - web service server.
Web Service Server Connector , KBA , LOD-SF-INT-BOM , Standard SF to 3rd Party Boomi Content , Problem