Hi, Do you need fulfillment on regular basis for something that is not categorized as sale ( gift or something like that)?
Probably you are using a channel other then amazon to sell (please correct me if i am wrong)
Secondly, do you have Amazon MWS-eligible seller account to use this API? After the details we will be well equipped for the solution.
We have a dedicated team of talented full-stack developers mastering php, Laravel, Yii, Magento2, WordPress, WooCommerce, OpenCart, thrid party APIs, AWS, React Native and Mobile apps.
Let us discuss more details in chatroom.
Thanks
Naeem