diff --git a/tempest/services/compute/json/extensions_client.py b/tempest/services/compute/json/extensions_client.py
index ce46a9b..ad5354c 100644
--- a/tempest/services/compute/json/extensions_client.py
+++ b/tempest/services/compute/json/extensions_client.py
@@ -37,3 +37,8 @@
         _, extensions = self.list_extensions()
         exts = extensions['extensions']
         return any([e for e in exts if e['name'] == extension])
+
+    def get_extension(self, extension_alias):
+        resp, body = self.get('extensions/%s' % extension_alias)
+        body = json.loads(body)
+        return resp, body['extension']
diff --git a/tempest/services/compute/v3/json/extensions_client.py b/tempest/services/compute/v3/json/extensions_client.py
index 60c0217..6e0dc9d 100644
--- a/tempest/services/compute/v3/json/extensions_client.py
+++ b/tempest/services/compute/v3/json/extensions_client.py
@@ -38,3 +38,8 @@
         _, extensions = self.list_extensions()
         exts = extensions['extensions']
         return any([e for e in exts if e['name'] == extension])
+
+    def get_extension(self, extension_alias):
+        resp, body = self.get('extensions/%s' % extension_alias)
+        body = json.loads(body)
+        return resp, body['extension']
diff --git a/tempest/services/compute/v3/xml/extensions_client.py b/tempest/services/compute/v3/xml/extensions_client.py
index e03251c..8f97692 100644
--- a/tempest/services/compute/v3/xml/extensions_client.py
+++ b/tempest/services/compute/v3/xml/extensions_client.py
@@ -43,3 +43,8 @@
         _, extensions = self.list_extensions()
         exts = extensions['extensions']
         return any([e for e in exts if e['name'] == extension])
+
+    def get_extension(self, extension_alias):
+        resp, body = self.get('extensions/%s' % extension_alias, self.headers)
+        body = xml_to_json(etree.fromstring(body))
+        return resp, body
diff --git a/tempest/services/compute/xml/extensions_client.py b/tempest/services/compute/xml/extensions_client.py
index 1395b5a..b17fc4f 100644
--- a/tempest/services/compute/xml/extensions_client.py
+++ b/tempest/services/compute/xml/extensions_client.py
@@ -43,3 +43,8 @@
         _, extensions = self.list_extensions()
         exts = extensions['extensions']
         return any([e for e in exts if e['name'] == extension])
+
+    def get_extension(self, extension_alias):
+        resp, body = self.get('extensions/%s' % extension_alias, self.headers)
+        body = xml_to_json(etree.fromstring(body))
+        return resp, body