Failing To Authorize Connection To Own GAE Endpoints API With Service Account

I've been beating my head against the wall trying to successfully authorize an API hit on the Google App Engine (GAE) project I'm running from a python script using OAuth2 and a se

Solution 1:

Thank you for the help. There are a couple things I did wrong above.

Firstly, I needed to reference the app engine project id in the allowed ids list.

API_ID = 'project-id-number.apps.googleusercontent.com'

@endpoints.method(message_types.VoidMessage, StatusCollection,
              allowed_client_ids=[API_ID, SERVICE_ACCOUNT_ID,
                                  endpoints.API_EXPLORER_CLIENT_ID],
              audiences=[ANDROID_AUDIENCE],
              scopes=[endpoints.EMAIL_SCOPE],
              path='status', http_method='GET',
              name='statuses.listStatus')

I had incorrectly come to the assumption that the build() method would only work with official google APIS, but it turned out I was referencing my project incorrectly. With the project id in place, I could use build() instead of writing my own httplib2 call in the server side file (which didn't work).

Erasing the code beneath 'http = credentials.authorize(http)' I replaced it with the following:

myservice = build('my-service', 'v1', http=http, discoveryServiceUrl=discoveryServiceUrl)
data = myservice.my-path().endpoint-name()
results = data.execute()

This successfully authorizes my account and calls the endpoint. Woot! If anyone else has questions about this, or if my solution isn't clear, please feel free to comment. This was a painful process I don't wish upon anyone else.