In Concepts, an overview of receiving ACH files was shown in Receiving Electronic Payments.

An incoming ACH file should be sent to the wm.ach.trp:receive service. The service validates the ACH file. Then the wm.ach.trp:receive service parses the batches that are in the ACH file. The next step is to invoke a service to process the batch. When the WmACHforTN package is disabled (indicating that you are not using Trading Networks), the wm.ach.trp:receive service routes the batch to the Integration Server service that is configured on the Routing page. For instructions about how to set up a routing rule, see Creating Routing Rules.

You create the Integration Server service that processes the batch. Each batch is associated with a single SEC code. In your service, process each entry in the batch. Use the wm.ach.batch:getNextEntry service to retrieve an entry.