How can I manually authorize MWS?

If you are having trouble signing up for MWS through the app itself, try following these steps:

 

Visit https://sellercentral.amazon.com in order to sign up for MWS*. Select Appstore > Manage Your Apps, then select Authorize new developer.

 

Enter "SellerEngine" for the developer name and 4958-2614-2458 for the account number if you are in North America. European users should enter 1503-7264-5235 and Japanese users should enter 3471-0179-0453.

 

After you complete the rest of the steps and reach the final confirmation page, email your SellerID/MerchantID to profitbandit@sellerengine.com. Note that your SellerID/MerchantID isn't your seller nickname. It is a long string of letters and numbers. If you're not sure what to send, just copy and paste everything or send a screenshot of the page.

 

Note: These steps still require you to have a Pro Merchant account.