An account manager plug-in for a Web server having an application programming interface (API). The plug-in is preferably a computer program product comprising a set of instructions (program code) encoded on a computer-readable substrate. This plug-in includes program code for establishing a set of one or more monitored resources (e.g., UrlCounter, ByteCounter, PageCounter and FailedLoginCounter) and for defining a threshold rule for at least one of the set of monitored resources. As Web transactions occur at the Web server, the account manager is responsive to a monitored resource exceeding a condition of a threshold rule for triggering one of a set of threshold actions. The set of threshold actions, for example, include clearing a record counter, running a given program, sending an e-mail note and disabling or enabling a user account.