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One part of trustfulness on web services application over the network is confidence of services that providers can guarantee to their customers. Therefore, after the development process, web services developers must be sure that the delivered services are qualified for availability and reliability during their execution. However, there is a critical problem when errors occur during the execution time of the service agent, such as the infinite loop problem in the service process. This unexpected problem of the web services software can cause critical damages in various aspects, especially lives and dead of people. Although there are various methods have been proposed to protect the unexpected errors, most of them are procedures in the verification and validation during the development processes. Nevertheless, these methods cannot completely solve the infinite loop problem since this problem is usually occurred by an unexpected values obtained from the execution of request and response processes . Therefore, this paper proposed a system architecture includes with a protection mechanism that completely detect and protect the unbound loop problem of web services when request services of each requester are under the dynamic situation. This proposed solution can guarantee that users will definitely be protected from a critical lost occurred from the unexpected infinite loop of the web services system. Consequently, all service agents with dynamic loop control condition can be trustable.