If you're already selling on Amazon, this article will help configure the current version of Zentail's Amazon repricer.
Log in to https://developer.amazonservices.com/
Scroll down to Third party developer and apps, and then click on "Visit Manage Your Apps" in the left hand corner.
Click on "Authorize new developer".
Use ZentailRepricer as the Developer's Name and 8281-7057-7009 as the Application Developer's ID in the image shown below:
Use your mouse to copy the token on the bottom of the screen.
In a new window or tab, visit the Zentail Integrations screen. Click on the Amazon card.
Paste the Token into the Repricer Seller-Developer Auth token field. Click 'Save Settings.'
Related Reading
How to Add Minimum and Maximum Prices to Activate Zentail's Repricers