Failing the OIC integration when REST API gives error response

Summary

Failing the OIC integration when REST API gives error response

Content

I created an OIC integration that uses a REST API to create inventory transactions, if the data is invalid such as invalid Item number the REST API fails with an error message, however the integration is successful because I was successfully able to call the REST endpoint and get the response. Now my question is how do fail the integration in this case? So that I can create the item in Oracle and Resubmit the transaction from monitoring window.

Thanks!

Ram