The endpoints are no longer working! They are working on development server and the pre-release announcement does not even mention the deprecation of the endpoints API.
There are others affected by this;
Please find an excerpt from the logs below;
Importing endpoints from google.appengine.ext is deprecated and will be removed. Add the endpoints library to app.yaml, then endpoints can be imported simply with "import endpoints".
E 2013-09-25 17:51:48.682
<type 'exceptions.RuntimeError'>: Endpoints library isn't available in python 2.5 runtime. Use the python27 runtime instead.
Traceback (most recent call last):
File "/base/data/home/apps/<app>/2-9-8.370476200610089604/services.py", line 3, in <module>
from google.appengine.ext import endpoints
File "/base/data/home/runtimes/python/python_lib/versions/1/google/appengine/ext/endpoints/__init__.py", line 51, in <module>
raise RuntimeError('Endpoints library isn\'t available in python 2.5 '