According to the new Google Apps Marketplace documentation, in order to get the status of a user license, it should be enough to make a simple GET request to https://www.googleapis.com/appsmarket/v2/userLicense/{applicationId}/{userId}?key={ApiKey} where applicationId is a number, userId an email and ApiKey a string taken directly from the Google Cloud Console under APIs -> {App name} -> Server Key -> Api Key.
I have also enabled the Google Apps Marketplace API in Google Cloud Console.
However, I always get the following error message:
{"error":
{"errors":[{"domain":"global","reason":"authError","message":"Invalid OAuth header","locationType":"header","location":"Authorization"}],
"code":401,"message":"Invalid OAuth header"}}
Can you help me?
EDIT: Following Arun Nagarajan's suggestion, I tried using a scope, but it still does not work. Here is my code (in Python on Google Appengine):
credentials = oauth2client.appengine.AppAssertionCredentials(scope='https://www.googleapis.com/auth/appsmarketplace.license')
http = credentials.authorize(http=httplib2.Http())
client = apiclient.discovery.build('appsmarket', 'v2', http=http, developerKey='XXXXXXXX')
entry = client.userLicense().get(applicationId='123456', userId='[email protected]').execute()
You have to use OAuth 2 with the https://www.googleapis.com/auth/appsmarketplace.license scope.
You cannot just get the license with just the server key.