Abstract: A system and method for processing e-commerce transactions on an IBM server, such as an iSeries or AS/400 computing system, is provided. XML-encoded e-commerce transactions are submitted via the Internet to a central e-commerce website server, from one or more requesters. The website server dispatches the XML transactions to an IBM server for processing thereby. Optionally, the e-commerce server can process the XML transactions in accordance with one or more pre-defined business rules. The XML transactions are received by the IBM server, and are translated thereby to one or more data structures and/or formats compatible with the IBM server. A server program on the IBM server parses the transaction, determines its type, and calls a handler program for handling the transaction. The handler program subsequently calls one or more customizable subroutines containing programmer-modified code for handling the transaction. Additionally, external applications can operate on the transaction.