Does exist Asset Management Agent (AM) for VMWare ESX servers ?
Client Automation - All Versions
There is no Agent for VMWare ESX servers.
But with the AM RVI plugin (running on Windows or Linux agent) it is possible to do the inventory of a ESX Server and its virtual machines.
See : VMware ESX
And see also these articles :
How to create a Remote Virtual Inventory Collect Task?
Installation and basic configuration of the Remote Inventory agent for ESX