Downloading the vSphere Web Services SDK
The vSphere Web Services SDK, along with other VMware SDKs, is contained in the vSphere Management SDK.
You can download the vSphere Management SDK at https://code.vmware.com. Click the SDKs link to reach a landing page that has links to all vSphere SDKs. After you download and 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.