diff --git a/releasenotes/notes/add-identity-v3-clients-as-a-library-d34b4fdf376984ad.yaml b/releasenotes/notes/add-identity-v3-clients-as-a-library-d34b4fdf376984ad.yaml
new file mode 100644
index 0000000..1af1939
--- /dev/null
+++ b/releasenotes/notes/add-identity-v3-clients-as-a-library-d34b4fdf376984ad.yaml
@@ -0,0 +1,6 @@
+---
+features:
+    - Define the identity v3 service client domains_client as a library.
+      Add domains_client to the library interface so the other
+      projects can use this module as a stable library without any
+      maintenance changes.
diff --git a/tempest/clients.py b/tempest/clients.py
index 1ab7cfe..a96b415 100644
--- a/tempest/clients.py
+++ b/tempest/clients.py
@@ -21,7 +21,7 @@
 from tempest.lib import auth
 from tempest.lib import exceptions as lib_exc
 from tempest.lib.services import clients
-from tempest.services import identity
+from tempest.lib.services import identity
 from tempest.services import object_storage
 from tempest.services import orchestration
 
diff --git a/tempest/lib/services/identity/__init__.py b/tempest/lib/services/identity/__init__.py
index e69de29..941a10e 100644
--- a/tempest/lib/services/identity/__init__.py
+++ b/tempest/lib/services/identity/__init__.py
@@ -0,0 +1,18 @@
+# Copyright (c) 2016 Hewlett-Packard Enterprise Development Company, L.P.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
+from tempest.lib.services.identity import v2
+from tempest.lib.services.identity import v3
+
+__all__ = ['v2', 'v3']
diff --git a/tempest/lib/services/identity/v3/__init__.py b/tempest/lib/services/identity/v3/__init__.py
index e69de29..8058d51 100644
--- a/tempest/lib/services/identity/v3/__init__.py
+++ b/tempest/lib/services/identity/v3/__init__.py
@@ -0,0 +1,38 @@
+# Copyright (c) 2016 Hewlett-Packard Enterprise Development Company, L.P.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
+from tempest.lib.services.identity.v3.credentials_client import \
+    CredentialsClient
+from tempest.lib.services.identity.v3.domains_client import DomainsClient
+from tempest.lib.services.identity.v3.endpoints_client import EndPointsClient
+from tempest.lib.services.identity.v3.groups_client import GroupsClient
+from tempest.lib.services.identity.v3.identity_client import IdentityClient
+from tempest.lib.services.identity.v3.inherited_roles_client import \
+    InheritedRolesClient
+from tempest.lib.services.identity.v3.policies_client import PoliciesClient
+from tempest.lib.services.identity.v3.projects_client import ProjectsClient
+from tempest.lib.services.identity.v3.regions_client import RegionsClient
+from tempest.lib.services.identity.v3.role_assignments_client import \
+    RoleAssignmentsClient
+from tempest.lib.services.identity.v3.roles_client import RolesClient
+from tempest.lib.services.identity.v3.services_client import ServicesClient
+from tempest.lib.services.identity.v3.token_client import V3TokenClient
+from tempest.lib.services.identity.v3.trusts_client import TrustsClient
+from tempest.lib.services.identity.v3.users_client import UsersClient
+
+__all__ = ['CredentialsClient', 'DomainsClient', 'EndPointsClient',
+           'GroupsClient', 'IdentityClient', 'InheritedRolesClient',
+           'PoliciesClient', 'ProjectsClient', 'RegionsClient',
+           'RoleAssignmentsClient', 'RolesClient', 'ServicesClient',
+           'V3TokenClient', 'TrustsClient', 'UsersClient', ]
diff --git a/tempest/services/identity/v3/json/domains_client.py b/tempest/lib/services/identity/v3/domains_client.py
similarity index 100%
rename from tempest/services/identity/v3/json/domains_client.py
rename to tempest/lib/services/identity/v3/domains_client.py
diff --git a/tempest/services/identity/__init__.py b/tempest/services/identity/__init__.py
deleted file mode 100644
index 53c223f..0000000
--- a/tempest/services/identity/__init__.py
+++ /dev/null
@@ -1,18 +0,0 @@
-# Copyright (c) 2016 Hewlett-Packard Enterprise Development Company, L.P.
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may not
-# use this file except in compliance with the License. You may obtain a copy of
-# the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations under
-# the License.
-
-from tempest.lib.services.identity import v2
-from tempest.services.identity import v3
-
-__all__ = ['v2', 'v3']
diff --git a/tempest/services/identity/v3/__init__.py b/tempest/services/identity/v3/__init__.py
deleted file mode 100644
index 6e64a7d..0000000
--- a/tempest/services/identity/v3/__init__.py
+++ /dev/null
@@ -1,38 +0,0 @@
-# Copyright (c) 2016 Hewlett-Packard Enterprise Development Company, L.P.
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may not
-# use this file except in compliance with the License. You may obtain a copy of
-# the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations under
-# the License.
-
-from tempest.lib.services.identity.v3.credentials_client import \
-    CredentialsClient
-from tempest.lib.services.identity.v3.endpoints_client import EndPointsClient
-from tempest.lib.services.identity.v3.groups_client import GroupsClient
-from tempest.lib.services.identity.v3.identity_client import IdentityClient
-from tempest.lib.services.identity.v3.inherited_roles_client import \
-    InheritedRolesClient
-from tempest.lib.services.identity.v3.policies_client import PoliciesClient
-from tempest.lib.services.identity.v3.projects_client import ProjectsClient
-from tempest.lib.services.identity.v3.regions_client import RegionsClient
-from tempest.lib.services.identity.v3.role_assignments_client import \
-    RoleAssignmentsClient
-from tempest.lib.services.identity.v3.roles_client import RolesClient
-from tempest.lib.services.identity.v3.services_client import ServicesClient
-from tempest.lib.services.identity.v3.token_client import V3TokenClient
-from tempest.lib.services.identity.v3.trusts_client import TrustsClient
-from tempest.lib.services.identity.v3.users_client import UsersClient
-from tempest.services.identity.v3.json.domains_client import DomainsClient
-
-__all__ = ['CredentialsClient', 'EndPointsClient', 'GroupsClient',
-           'IdentityClient', 'InheritedRolesClient', 'PoliciesClient',
-           'ProjectsClient', 'RegionsClient', 'RoleAssignmentsClient',
-           'RolesClient', 'ServicesClient', 'V3TokenClient', 'TrustsClient',
-           'UsersClient', 'DomainsClient', ]
diff --git a/tempest/services/identity/v3/json/__init__.py b/tempest/services/identity/v3/json/__init__.py
deleted file mode 100644
index e69de29..0000000
--- a/tempest/services/identity/v3/json/__init__.py
+++ /dev/null
diff --git a/tempest/tests/cmd/test_account_generator.py b/tempest/tests/cmd/test_account_generator.py
index b08954f..6773b2f 100644
--- a/tempest/tests/cmd/test_account_generator.py
+++ b/tempest/tests/cmd/test_account_generator.py
@@ -75,7 +75,7 @@
         fake_domain_list = {'domains': [{'id': 'fake_domain',
                                          'name': 'Fake_Domain'}]}
         self.useFixture(fixtures.MockPatch(''.join([
-            'tempest.services.identity.v3.json.domains_client.'
+            'tempest.lib.services.identity.v3.domains_client.'
             'DomainsClient.list_domains']),
             return_value=fake_domain_list))
         self.useFixture(fixtures.MockPatch(
@@ -121,7 +121,7 @@
         super(TestAccountGeneratorV3, self).setUp()
         fake_domain_list = {'domains': [{'id': 'fake_domain'}]}
         self.useFixture(fixtures.MockPatch(''.join([
-            'tempest.services.identity.v3.json.domains_client.'
+            'tempest.lib.services.identity.v3.domains_client.'
             'DomainsClient.list_domains']),
             return_value=fake_domain_list))
 
diff --git a/tempest/tests/common/test_dynamic_creds.py b/tempest/tests/common/test_dynamic_creds.py
index a90ca8a..b4fbd50 100644
--- a/tempest/tests/common/test_dynamic_creds.py
+++ b/tempest/tests/common/test_dynamic_creds.py
@@ -27,6 +27,7 @@
     v2_tenants_client
 from tempest.lib.services.identity.v2 import token_client as v2_token_client
 from tempest.lib.services.identity.v2 import users_client as v2_users_client
+from tempest.lib.services.identity.v3 import domains_client
 from tempest.lib.services.identity.v3 import identity_client as v3_iden_client
 from tempest.lib.services.identity.v3 import projects_client as \
     v3_projects_client
@@ -35,7 +36,6 @@
 from tempest.lib.services.identity.v3 import users_client as \
     v3_users_client
 from tempest.lib.services.network import routers_client
-from tempest.services.identity.v3.json import domains_client
 from tempest.tests import base
 from tempest.tests import fake_config
 from tempest.tests.lib import fake_http
diff --git a/tempest/tests/lib/services/identity/v3/test_domains_client.py b/tempest/tests/lib/services/identity/v3/test_domains_client.py
new file mode 100644
index 0000000..f89ced7
--- /dev/null
+++ b/tempest/tests/lib/services/identity/v3/test_domains_client.py
@@ -0,0 +1,138 @@
+# Copyright 2016 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from tempest.lib.services.identity.v3 import domains_client
+from tempest.tests.lib import fake_auth_provider
+from tempest.tests.lib.services import base
+
+
+class TestDomainsClient(base.BaseServiceTest):
+    FAKE_CREATE_DOMAIN = {
+        "domain": {
+            "description": "Domain description",
+            "enabled": True,
+            "name": "myDomain"
+        }
+    }
+
+    FAKE_DOMAIN_INFO = {
+        "domain": {
+            "description": "Used for swift functional testing",
+            "enabled": True,
+            "id": "5a75994a3",
+            "links": {
+                "self": "http://example.com/identity/v3/domains/5a75994a3"
+            },
+            "name": "swift_test"
+        }
+    }
+
+    FAKE_LIST_DOMAINS = {
+        "domains": [
+            {
+                "description": "Used for swift functional testing",
+                "enabled": True,
+                "id": "5a75994a3",
+                "links": {
+                    "self": "http://example.com/identity/v3/domains/5a75994a3"
+                },
+                "name": "swift_test"
+            },
+            {
+                "description": "Owns users and tenants available on " +
+                               "Identity API",
+                "enabled": True,
+                "id": "default",
+                "links": {
+                    "self": "http://example.com/identity/v3/domains/default"
+                },
+                "name": "Default"
+            }
+        ],
+        "links": {
+            "next": None,
+            "previous": None,
+            "self": "http://example.com/identity/v3/domains"
+        }
+    }
+
+    def setUp(self):
+        super(TestDomainsClient, self).setUp()
+        fake_auth = fake_auth_provider.FakeAuthProvider()
+        self.client = domains_client.DomainsClient(fake_auth,
+                                                   'identity',
+                                                   'regionOne')
+
+    def _test_create_domain(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.create_domain,
+            'tempest.lib.common.rest_client.RestClient.post',
+            self.FAKE_CREATE_DOMAIN,
+            bytes_body,
+            status=201)
+
+    def _test_show_domain(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.show_domain,
+            'tempest.lib.common.rest_client.RestClient.get',
+            self.FAKE_DOMAIN_INFO,
+            bytes_body,
+            domain_id="5a75994a3")
+
+    def _test_list_domains(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.list_domains,
+            'tempest.lib.common.rest_client.RestClient.get',
+            self.FAKE_LIST_DOMAINS,
+            bytes_body)
+
+    def _test_update_domain(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.update_domain,
+            'tempest.lib.common.rest_client.RestClient.patch',
+            self.FAKE_DOMAIN_INFO,
+            bytes_body,
+            domain_id="5a75994a3")
+
+    def test_create_domain_with_str_body(self):
+        self._test_create_domain()
+
+    def test_create_domain_with_bytes_body(self):
+        self._test_create_domain(bytes_body=True)
+
+    def test_show_domain_with_str_body(self):
+        self._test_show_domain()
+
+    def test_show_domain_with_bytes_body(self):
+        self._test_show_domain(bytes_body=True)
+
+    def test_list_domain_with_str_body(self):
+        self._test_list_domains()
+
+    def test_list_domain_with_bytes_body(self):
+        self._test_list_domains(bytes_body=True)
+
+    def test_update_domain_with_str_body(self):
+        self._test_update_domain()
+
+    def test_update_domain_with_bytes_body(self):
+        self._test_update_domain(bytes_body=True)
+
+    def test_delete_domain(self):
+        self.check_service_client_function(
+            self.client.delete_domain,
+            'tempest.lib.common.rest_client.RestClient.delete',
+            {},
+            domain_id="5a75994a3",
+            status=204)