I have recently updated the OpenIDM shell REST client to include pulling back access, activity and recon logs over REST. The client helps with command line management of an OpenIDM environment by performing admin tasks over the REST interface simply via a menu system. The set of scripts is just built on curl.
User management is based on simple create-read-update-delete tasks, as well as doing specific attribute/value searches.
I will add more scripts as the endpoints develop. For further information on the OpenIDM REST API take a look at the OpenIDM Integrators Guide.