Dynamic host integration techniques are provided. A Transaction-based system integrates heterogeneous hosts to perform various operations associated with the transaction-based system. A command handler implements a specific operation for a host system and a protocol handler implements a specific communication protocol for contacting and having the host system execute the specific operation. For any given transaction within the transaction-based system a command handler and a protocol handler are dynamically acquired and bound to the processing flow to execute a desired operation on a remote and heterogeneous host system.