Similarly to metrics being added to Okapi via
What metrics should be added?
1. outgoing API calls need to have their own set of metrics:
- rate (reqs/sec) of calls to API "x"
- total count of calls to API "x"
- duration of calls to API "x"
RMB provides HttpModuleClient2 that some RMB based modules use https://github.com/folio-org/raml-module-builder/blob/master/domain-models-runtime/src/main/java/org/folio/rest/tools/client/HttpModuleClient2.java and this is the client that can be instrumented.