Recently, I got this error, when android app access GAE API. It worked before, and I don't change anything.
gms.StatusHelper Status from wire: INVALID_KEY status: null
07-22 13:42:28.786: W/System.err(19213): com.google.api.client.googleapis.extensions.android.gms.auth.GoogleAuthIOException
07-22 13:42:28.796: W/System.err(19213): at com.google.api.client.googleapis.extensions.android.gms.auth.GoogleAccountCredential$RequestHandler.intercept(GoogleAccountCredential.java:308)
07-22 13:42:28.796: W/System.err(19213): at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:854)
07-22 13:42:28.796: W/System.err(19213): at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:410)
07-22 13:42:28.796: W/System.err(19213): at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:343)
07-22 13:42:28.796: W/System.err(19213): at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:460)
07-22 13:42:28.796: W/System.err(19213): at com.viziner.cleaninghouse.api.APIAsyncTask.doInBackground(APIAsyncTask.java:312)
07-22 13:42:28.796: W/System.err(19213): at com.viziner.cleaninghouse.api.APITask.doInBackground(APITask.java:1)
07-22 13:42:28.796: W/System.err(19213): at android.os.AsyncTask$2.call(AsyncTask.java:288)
07-22 13:42:28.796: W/System.err(19213): at java.util.concurrent.FutureTask.run(FutureTask.java:237)
07-22 13:42:28.796: W/System.err(19213): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
07-22 13:42:28.796: W/System.err(19213): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
07-22 13:42:28.796: W/System.err(19213): at java.lang.Thread.run(Thread.java:818)