diff --git a/kollacli/api/group.py b/kollacli/api/group.py
index d173fb7..aa71690 100644
--- a/kollacli/api/group.py
+++ b/kollacli/api/group.py
@@ -11,6 +11,8 @@
 #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 #    License for the specific language governing permissions and limitations
 #    under the License.
+import kollacli.i18n as u
+
 from kollacli.api.exceptions import MissingArgument
 from kollacli.common.inventory import Inventory
 from kollacli.common.utils import safe_decode
@@ -18,15 +20,45 @@ from kollacli.common.utils import safe_decode
 
 class GroupApi(object):
 
+    class Group(object):
+        def __init__(self, groupname, servicenames, hostnames):
+            self.name = groupname
+            self.servicenames = servicenames
+            self.hostnames = hostnames
+
+        def get_name(self):
+            """Get name
+
+            :return: group name
+            :rtype: string
+            """
+            return self.name
+
+        def get_servicenames(self):
+            """Get service names associated with this group.
+
+            :return: service names
+            :rtype: list of strings
+            """
+            return self.servicenames
+
+        def get_hostnames(self):
+            """Get host names associated with this group.
+
+            :return: host names
+            :rtype: list of strings
+            """
+            return self.hostnames
+
     def group_add(self, groupname):
-        """add a group to the inventory
+        """Add a group to the inventory
 
         :param groupname: name of the group to add to the inventory
-        :param groupname: string
+        :type groupname: string
 
         """
         if not groupname:
-            raise MissingArgument('group name')
+            raise MissingArgument('Group name')
         groupname = safe_decode(groupname)
 
         inventory = Inventory.load()
@@ -34,16 +66,50 @@ class GroupApi(object):
         Inventory.save(inventory)
 
     def group_remove(self, groupname):
-        """remove a group from the inventory
+        """Remove a group from the inventory
 
         :param groupname: name of the group to remove from the inventory
-        :param groupname: string
+        :type groupname: string
 
         """
         if not groupname:
-            raise MissingArgument('group name')
+            raise MissingArgument('Group name')
 
         inventory = Inventory.load()
         groupname = safe_decode(groupname)
         inventory.remove_group(groupname)
         Inventory.save(inventory)
+
+    def group_get_all(self):
+        """Get all groups in the inventory
+
+        :return: groups
+        :rtype: list of Group objects
+        """
+        return self._get_groups(None, get_all=True)
+
+    def group_get(self, groupnames):
+        """Get selected groups in the inventory
+
+        :param groupnames: names of groups to be read
+        :type groupnames: list of strings
+        :return: groups
+        :rtype: list of Group objects
+        """
+        if groupnames is None:
+            raise(MissingArgument(u._('Group names')))
+        groupnames = safe_decode(groupnames)
+        return self._get_groups(groupnames)
+
+    def _get_groups(self, groupnames, get_all=False):
+        groups = []
+        inventory = Inventory.load()
+        group_services = inventory.get_group_services()
+        inv_groups = inventory.get_groups()
+        for inv_group in inv_groups:
+            if get_all or inv_group.name in groupnames:
+                group = self.Group(inv_group.name,
+                                   group_services[inv_group.name],
+                                   inv_group.get_hostnames())
+                groups.append(group)
+        return groups
diff --git a/kollacli/api/service.py b/kollacli/api/service.py
index c30d7c9..6464fcd 100644
--- a/kollacli/api/service.py
+++ b/kollacli/api/service.py
@@ -15,6 +15,7 @@ import kollacli.i18n as u
 
 from kollacli.api.exceptions import MissingArgument
 from kollacli.common.inventory import Inventory
+from kollacli.common.utils import safe_decode
 
 
 class ServiceApi(object):
@@ -94,6 +95,7 @@ class ServiceApi(object):
         """
         if servicenames is None:
             raise(MissingArgument(u._('Service names')))
+        servicenames = safe_decode(servicenames)
         return self._get_services(servicenames)
 
     def _get_services(self, servicenames, get_all=False):
diff --git a/kollacli/commands/group.py b/kollacli/commands/group.py
index 2d8a1ed..3be1a0b 100644
--- a/kollacli/commands/group.py
+++ b/kollacli/commands/group.py
@@ -123,18 +123,16 @@ class GroupListhosts(Lister):
 
     def take_action(self, parsed_args):
         try:
-            inventory = Inventory.load()
-
-            data = []
-            group_hosts = inventory.get_group_hosts()
-            if group_hosts:
-                for (groupname, hostnames) in group_hosts.items():
-                    data.append((groupname, hostnames))
-            else:
-                data.append(('', ''))
+            data = [('', '')]
+            groups = CLIENT.group_get_all()
+            if groups:
+                data = []
+                for group in groups:
+                    data.append((group.get_name(),
+                                 sorted(group.get_hostnames())))
             return ((u._('Group'), u._('Hosts')), sorted(data))
-        except CommandError as e:
-            raise e
+        except ClientException as e:
+            raise CommandError(str(e))
         except Exception as e:
             raise Exception(traceback.format_exc())
 
@@ -197,17 +195,15 @@ class GroupListservices(Lister):
 
     def take_action(self, parsed_args):
         try:
-            inventory = Inventory.load()
-
-            data = []
-            group_services = inventory.get_group_services()
-            if group_services:
-                for (groupname, servicenames) in group_services.items():
-                    data.append((groupname, sorted(servicenames)))
-            else:
-                data.append(('', ''))
+            data = [('', '')]
+            groups = CLIENT.group_get_all()
+            if groups:
+                data = []
+                for group in groups:
+                    data.append((group.get_name(),
+                                 sorted(group.get_servicenames())))
             return ((u._('Group'), u._('Services')), sorted(data))
-        except CommandError as e:
-            raise e
+        except ClientException as e:
+            raise CommandError(str(e))
         except Exception as e:
             raise Exception(traceback.format_exc())