The MicroProfile Rest Client specification provides a type-safe mechanism for invoking RESTful services.
To enable the MicroProfile Rest Client 1.0 feature, add the following element declaration inside the featureManager element in your server.xml file:
<feature>mpRestClient-1.0</feature>
If you are developing a feature that depends on the MicroProfile Rest Client 1.0 feature, include the following item in the Subsystem-Content header in the feature manifest file for your new feature:
com.ibm.websphere.appserver.mpRestClient-1.0; type="osgi.subsystem.feature"