diff --git a/third_party/endpoints/types.py b/third_party/endpoints/types.py
new file mode 100644
index 0000000..e6291fd
--- /dev/null
+++ b/third_party/endpoints/types.py
@@ -0,0 +1,57 @@
+# Copyright 2016 Google Inc. All Rights Reserved.
+#
+# 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.
+
+"""Provide various utility/container types needed by Endpoints Framework.
+
+Putting them in this file makes it easier to avoid circular imports,
+as well as keep from complicating tests due to importing code that
+uses App Engine apis.
+"""
+
+from __future__ import absolute_import
+
+import six
+
+import attr
+
+__all__ = [
+    'OAuth2Scope', 'Issuer', 'LimitDefinition', 'Namespace',
+]
+
+
+@attr.s(frozen=True, slots=True)
+class OAuth2Scope(object):
+    scope = attr.ib(validator=attr.validators.instance_of(six.string_types))
+    description = attr.ib(validator=attr.validators.instance_of(six.string_types))
+
+    @classmethod
+    def convert_scope(cls, scope):
+        "Convert string scopes into OAuth2Scope objects."
+        if isinstance(scope, cls):
+            return scope
+        return cls(scope=scope, description=scope)
+
+    @classmethod
+    def convert_list(cls, values):
+        "Convert a list of scopes into a list of OAuth2Scope objects."
+        if values is not None:
+            return [cls.convert_scope(value) for value in values]
+
+Issuer = attr.make_class('Issuer', ['issuer', 'jwks_uri'])
+LimitDefinition = attr.make_class('LimitDefinition', ['metric_name',
+                                                      'display_name',
+                                                      'default_limit'])
+Namespace = attr.make_class('Namespace', ['owner_domain',
+                                          'owner_name',
+                                          'package_path'])