The vSphere Web Services SDK, along with other VMware SDKs, is contained in the vSphere Management SDK. You can find the vSphere Management SDK at https://developercenter.vmware.com, which links to the My VMware service.After you expand the vSphere Management SDK package, the Web Services SDK is in the subdirectory SDK/vsphere-ws. You also need the SDK/ssoclient subdirectory for client authentication.