We have a PHP script that updates stock on Amazon via the MWS API, we need this to be compatable with the new seller API so we can add additional market places as we no longer can get access keys for MWS. It is a simple script that actions a GET request from another server to build the request to post the stock update to amazon. The reply is then sent back to the remote server by TCP socket or queued for later if the remote server is not available to process the reply.
I have attached an example of the old MWS stock update script, so an understanding of the necessary function is there.
Please quote for upgrading this and an updating a order polling script that works in a similar way.
We would like to create a long term relationship with a developer, so we can build a few more queries such as FBA stock queries.