Xen API Libs is a set of libraries and utilities in OCaml 3.12 that are used by xapi. The libraries are a component of the Xen Cloud Platform (XCP) project.
Xen Cloud Platform (XCP) is an open source enterprise-ready server virtualization and cloud computing platform. XCP builds on the Xen Hypervisor; and provides network and storage support, and management tools in a single, tested installable image.
XCP runs many guest operating systems, including Linux and Microsoft Windows.
Links:
You can usually find the developers hanging out in #xen-api on freenode.
