vCenter Server integrates with the vSphere Automation API endpoint that provides a common surface for exposing several vSphere services. When you use the vSphere Automation API endpoint, you establish a single session that provides access to virtual machine management, search and filter, Content Library, and other services for working with vSphere objects.
Other endpoints associated with vCenter Server include the Lookup Service and the vCenter Single Sign-On service. For more information about using the Lookup Service, see Retrieving Service Endpoints. For more information about using the vCenter Single Sign-On service, see vCenter Single Sign-On Token Authentication for vCenter Server.