Hello, I have some customized ResourceProviders implements RealmResourceProvider (follow the example in keycloak: org.keycloak.examples.rest), something like this: public class UserProvider implements RealmResourceProvider { ... @Path("/{username}/pre-authentication") @PUT @Produces(MediaType.APPLICATION_JSON) public Response validateAuthenticationRequest(@PathParam("username") String username, @HeaderParam("Authorization") String authorization) { } ... } I also create Log Interceptor following the document here: https://docs.oracle.com/javaee/7/tutorial/cdi-adv006.htm, <https://docs.oracle.com/javaee/7/tutorial/cdi-adv006.htm> and add Log interceptor annotation in previous class like : public class UserProvider implements RealmResourceProvider { ... @Path("/{username}/pre-authentication") @LogInterceptor @PUT @Produces(MediaType.APPLICATION_JSON) public Response validateAuthenticationRequest(@PathParam("username") String username, @HeaderParam("Authorization") String authorization) { } ... } But the Interceptor doesn't work. Do you have any ideas why? Many Thanks! Stone 25.6 Using Interceptors in CDI Applications - Java ...<https://docs.oracle.com/javaee/7/tutorial/cdi-adv006.htm> docs.oracle.com 25.6 Using Interceptors in CDI Applications. An interceptor is a class used to interpose in method invocations or lifecycle events that occur in an associated target ...