The vSphere Web Services SDK, along with other VMware SDKs, is contained in the vSphere Management SDK. You can download the vSphere Management SDK using links at http://www.vmware.com/download/sdk/, which lead you 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.