Hello,
we have worked with MWS API and have good expertise , in our last development we have developed a program that can download information about sales, inventory, etc through the Amazon API and store it in an SQL database.
some features are
-Ability to update and change pricing
Pulls in pricing data from Amazon for all the SKUs
Checks to see what price you are at
User sets min, max, etc pricing based on what they want
Refer to appeagle
-Ability to send feedback automatically and so on ....
please share full specs so i can advise you at best , i will do technical analysis and update you with estimates in the next steps
it would be our pleasure to assist you
Thanks