Amazon Shipping is Amazon's new carrier service (not to be confused with the Amazon Buy Shipping API, which instead provides access to carriers you've connected to your Amazon account).
An active account with Amazon.
To create an account, visit Amazon sign up page.
Approved "First Pickup Date" from Amazon
To connect your Amazon Shipping account to ShipStation:
Amazon must activate Amazon Shipping on your Amazon account.
Contact your Amazon account manager to start this process.
When your Amazon account is set up, you will receive a "First Pickup Date". This is when you will be able to start using Amazon Shipping.
After you have your First Pickup Date, contact ShipStation Support to enable Amazon Shipping as a carrier on your ShipStation account.
The subject line should be "Enable Amazon Shipping" and include the email address associated with your ShipStation account.
You will then see Amazon Shipping UK and the available services in your Services drop-down.
You can start creating labels with Amazon Shipping starting on your scheduled First Pickup Date.
Remember these points about ShipStation's integration with Amazon Shipping:
You cannot use Amazon Shipping to create labels for Walmart or ebay orders.
Does not support custom packages.
No additional insurance option.
No Signature Confirmation option.