Abstract: An apparatus for agent based monitoring software-as-a-service information technology service management. Proxy clients are installed on network equipment devices belonging to a customer. Each proxy client includes discovery module(s) to discover network equipment devices on at least one private network of the customer, a discovery reporting module to transmit information identifying the devices discovered by the discovery modules to a server using web services, and monitoring module that monitors network equipment device(s) according to monitoring definition(s) configured by the customer to collect information of those network equipment devices, receives monitored information from monitoring agents installed on different network equipment devices, and transmits the information collected and the received monitored information to the server using web services. Each of the monitoring definitions identifies which of the network equipment devices to monitor and defines parameter(s) of the monitoring.