1. Login Into your Amazon Seller Central Account

From Seller Central go to settings in the top right corner then go to User Permissions.  Scroll down to Third party developer and apps, click "Visit manage your apps"

Use the appropriate link below for your marketplace:
Amazon.com - Go to https://developer.amazonservices.com/gp/mws/registration/register.html
Amazon.co.uk - Go to https://developer.amazonservices.co.uk/gp/mws/registration/register.html
Amazon.ca - Go to https://developer.amazonservices.ca

Log into your "Seller Central" Account

2. Create MWS Auth Token

Now click the button "Authorize a new developer"

Amazon.com
Developer's Name: HelloProfit LLC
Developer Account Number: 6389-5173-0595

Amazon.ca
Developer's Name: HelloProfit LLC
Developer Account Number: 6389-5173-0595

Amazon.co.uk
Developer's Name: HelloProfit LLC
Developer Account Number: 0074-2000-2734

Accept the terms and click next

3. Create MWS Auth Token

You will be presented with the following screen after you click next

You will need to use the Seller ID and the MWS Auth Token from the screenshot above.

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