According to the Push queue in GAE there are a number of task request headers.
X-AppEngine-QueueName, the name of the queue (possibly default) X-AppEngine-TaskName, the name of the task, or a system-generated unique ID if no name was specified X-AppEngine-TaskRetryCount, the number of times this task has been retried; for the first attempt, this value is 0. This number includes attempts where the task failed due to a lack of available instances and never reached the execution phase. X-AppEngine-TaskExecutionCount, the number of times this task has previously failed during the execution phase. This number does not include failures due to a lack of available instances. X-AppEngine-TaskETA, the target execution time of the task, specified in milliseconds since January 1st 1970.
Is there a way to check how many tasks are already enqueued?