diff --git a/releasenotes/notes/add-show-quota-details-api-to-network-quotas-client-3fffd302cc5d335f.yaml b/releasenotes/notes/add-show-quota-details-api-to-network-quotas-client-3fffd302cc5d335f.yaml
new file mode 100644
index 0000000..406e282
--- /dev/null
+++ b/releasenotes/notes/add-show-quota-details-api-to-network-quotas-client-3fffd302cc5d335f.yaml
@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    Add extension API show quota details to network quotas_client library.
+    This feature enables the possibility to show a quota set for a specified
+    project that includes the quota’s used, limit and reserved counts for per
+    resource
diff --git a/tempest/api/network/admin/test_quotas.py b/tempest/api/network/admin/test_quotas.py
index 57a28bf..b1e4a58 100644
--- a/tempest/api/network/admin/test_quotas.py
+++ b/tempest/api/network/admin/test_quotas.py
@@ -13,6 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import testtools
+
 from tempest.api.network import base
 from tempest.common import identity
 from tempest.common import utils
@@ -89,3 +91,15 @@
     def test_quotas(self):
         new_quotas = {'network': 0, 'port': 0}
         self._check_quotas(new_quotas)
+
+    @testtools.skipUnless(utils.is_extension_enabled(
+        'quota_details', 'network'), 'Quota details extension not enabled.')
+    @decorators.idempotent_id('7b05ec5f-bf44-43cb-b28f-ddd72a824288')
+    def test_show_quota_details(self):
+        # Show quota details for an existing project
+        quota_details = self.admin_quotas_client.show_quota_details(
+            self.admin_quotas_client.tenant_id)['quota']
+        expected_keys = ['used', 'limit', 'reserved']
+        for resource_type in quota_details:
+            for key in expected_keys:
+                self.assertIn(key, quota_details[resource_type])
diff --git a/tempest/lib/services/network/quotas_client.py b/tempest/lib/services/network/quotas_client.py
index f23af88..e9666de 100644
--- a/tempest/lib/services/network/quotas_client.py
+++ b/tempest/lib/services/network/quotas_client.py
@@ -46,3 +46,8 @@
         """List default quotas for a project."""
         uri = '/quotas/%s/default' % tenant_id
         return self.show_resource(uri)
+
+    def show_quota_details(self, tenant_id):
+        """Show quota details for a project."""
+        uri = '/quotas/%s/details.json' % tenant_id
+        return self.show_resource(uri)
diff --git a/tempest/tests/lib/services/network/test_quotas_client.py b/tempest/tests/lib/services/network/test_quotas_client.py
index 5a09911..aa6c1a1 100644
--- a/tempest/tests/lib/services/network/test_quotas_client.py
+++ b/tempest/tests/lib/services/network/test_quotas_client.py
@@ -54,6 +54,46 @@
 
     FAKE_QUOTA_TENANT_ID = "bab7d5c60cd041a0a36f7c4b6e1dd978"
 
+    FAKE_QUOTA_DETAILS = {
+        "quota": {
+            "rbac_policy": {
+                "used": 4,
+                "limit": 10,
+                "reserved": 0
+            },
+            "subnetpool": {
+                "used": 2,
+                "limit": -1,
+                "reserved": 0
+            },
+            "security_group_rule": {
+                "used": 10,
+                "limit": 100,
+                "reserved": 1
+            },
+            "security_group": {
+                "used": 3,
+                "limit": 10,
+                "reserved": 0
+            },
+            "subnet": {
+                "used": 3,
+                "limit": 100,
+                "reserved": 0
+            },
+            "port": {
+                "used": 21,
+                "limit": 500,
+                "reserved": 3
+            },
+            "network": {
+                "used": 9,
+                "limit": 100,
+                "reserved": 2
+            }
+        }
+    }
+
     def setUp(self):
         super(TestQuotasClient, self).setUp()
         fake_auth = fake_auth_provider.FakeAuthProvider()
@@ -95,6 +135,15 @@
             200,
             tenant_id=self.FAKE_QUOTA_TENANT_ID)
 
+    def _test_show_quota_details(self, bytes_body=False):
+        self.check_service_client_function(
+            self.quotas_client.show_quota_details,
+            "tempest.lib.common.rest_client.RestClient.get",
+            self.FAKE_QUOTA_DETAILS,
+            bytes_body,
+            200,
+            tenant_id=self.FAKE_QUOTA_TENANT_ID)
+
     def test_reset_quotas(self):
         self.check_service_client_function(
             self.quotas_client.reset_quotas,
@@ -126,3 +175,9 @@
 
     def test_update_quotas_with_bytes_body(self):
         self._test_update_quotas(bytes_body=True)
+
+    def test_show_quota_details_with_str_body(self):
+        self._test_show_quota_details()
+
+    def test_show_quota_details_with_bytes_body(self):
+        self._test_show_quota_details(bytes_body=True)