The client connection interface ("CCI") provides a uniform mechanism for accessing services hosted inside the ODE container from objects outside the container. For example, through the CCI a client can connect to a running BPEL service to inspect the state of a process instance; similarly, a Servlet may use the CCI to notify a ODE SOAP service that a new message has arrived.

The CCI supports marshalling of invocations for arbitrary interfaces that are defined by each particular service provider. Both blocking and non-blocking operations are supported.