The document provides an introduction and overview of the vCloud API. It discusses key concepts such as the API being standardized, platform independent, and focused on resource semantics rather than physical infrastructure. It also covers the API features such as interface for providing and consuming cloud resources, deployment and management of virtual workloads, and migration of workloads between clouds. Examples of API operations like powering on a vApp, looking at vApp details, and instantiating a vApp template are also provided at a high level.