Sellers in the US click here (sellers in Europe click here) and log into your Amazon account.
1. On the screen (pictured below), click the blue Authorize New Developer button.
2. Copy and paste in
Developer’s Name: Feedbackz
Developer Account Number (for US Sellers): 1321-4613-3348
Developer Account Number (for Europe Sellers): 7373-5827-6175
3. After you hit the Next button, agree and accept the two checkboxes and hit Next again.
4. Copy and paste Seller ID and MWS Auth Token into Feedbackz. (be sure to copy/paste/save this page as you won’t be able to access it again without starting from scratch).