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+.. _clients:
+
+Service Clients Usage
+=====================
+
+Tests make requests against APIs using service clients. Service clients are
+specializations of the ``RestClient`` class. The service clients that cover the
+APIs exposed by a service should be grouped in a service clients module.
+A service clients module is python module where all service clients are
+defined. If major API versions are available, submodules should be defined,
+one for each version.
+
+The ``ClientsFactory`` class helps initializing all clients of a specific
+service client module from a set of shared parameters.
+
+The ``ServiceClients`` class provides a convenient way to get access to all
+available service clients initialized with a provided set of credentials.
+
+------------------
+The clients module
+------------------
+
+.. automodule:: tempest.lib.services.clients
+   :members: