diff --git a/third_party/endpoints/generated_error_info.py b/third_party/endpoints/generated_error_info.py
new file mode 100644
index 0000000..d0c31c3
--- /dev/null
+++ b/third_party/endpoints/generated_error_info.py
@@ -0,0 +1,69 @@
+# 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.
+
+"""Automatically generated mapping of error codes."""
+
+# pylint: disable=g-bad-name
+
+from __future__ import absolute_import
+
+import collections
+
+_ErrorInfo = collections.namedtuple(
+    '_ErrorInfo', ['http_status', 'rpc_status', 'reason', 'domain'])
+
+_UNSUPPORTED_ERROR = _ErrorInfo(404,
+                                404,
+                                'unsupportedProtocol',
+                                'global')
+_BACKEND_ERROR = _ErrorInfo(503,
+                            -32099,
+                            'backendError',
+                            'global')
+_ERROR_MAP = {
+    400: _ErrorInfo(400, 400, 'badRequest', 'global'),
+    401: _ErrorInfo(401, 401, 'required', 'global'),
+    402: _ErrorInfo(404, 404, 'unsupportedProtocol', 'global'),
+    403: _ErrorInfo(403, 403, 'forbidden', 'global'),
+    404: _ErrorInfo(404, 404, 'notFound', 'global'),
+    405: _ErrorInfo(501, 501, 'unsupportedMethod', 'global'),
+    406: _ErrorInfo(404, 404, 'unsupportedProtocol', 'global'),
+    407: _ErrorInfo(404, 404, 'unsupportedProtocol', 'global'),
+    408: _ErrorInfo(503, -32099, 'backendError', 'global'),
+    409: _ErrorInfo(409, 409, 'conflict', 'global'),
+    410: _ErrorInfo(410, 410, 'deleted', 'global'),
+    411: _ErrorInfo(404, 404, 'unsupportedProtocol', 'global'),
+    412: _ErrorInfo(412, 412, 'conditionNotMet', 'global'),
+    413: _ErrorInfo(413, 413, 'uploadTooLarge', 'global'),
+    414: _ErrorInfo(404, 404, 'unsupportedProtocol', 'global'),
+    415: _ErrorInfo(404, 404, 'unsupportedProtocol', 'global'),
+    416: _ErrorInfo(404, 404, 'unsupportedProtocol', 'global'),
+    417: _ErrorInfo(404, 404, 'unsupportedProtocol', 'global'),
+    }
+
+
+def get_error_info(lily_status):
+  """Get info that would be returned by the server for this HTTP status.
+
+  Args:
+    lily_status: An integer containing the HTTP status returned by the SPI.
+
+  Returns:
+    An _ErrorInfo object containing information that would be returned by the
+    live server for the provided lily_status.
+  """
+  if lily_status >= 500:
+    return _BACKEND_ERROR
+
+  return _ERROR_MAP.get(lily_status, _UNSUPPORTED_ERROR)