I am currently integrating this sdk with our product. I have received an error today that I have 0 credits and "license expired". I have never processed a page. Yesterday the images were queued for a long long time and never processed. I think this sdk has great potential. Some suggestions:
1.) health check method - you may have this already, please post a method to determine the status of the service. I would rather not process my customers documents or put them in the queue if the service is down.
2.) queue wait time - there appears to be some latency between submission and actual processing. If we had an estimated wait time, it might be better for my users to determine if they want to process or wait.
3.) account information - you may have this already, if my customers want information about how many "credits" are left in their account, this would be helpful.
Again, this looks like a promising sdk. Thanks.