Verify the Amazon API Key
When accessing Amazon Sales Channel, Magento automatically checks and validates the Amazon API key you have added in your store configuration. If validated, then you can move on to the next step, Store Integration.
If the Amazon API key is missing, invalid, or expired, you must update your key. A message displays prompting you to get an API key and to add they key to your Amazon Sales Channel configuration.
To get and add the Amazon API key as prompted:
The API key is validated each time you access your Amazon Sales Channel.
On the Admin sidebar, tap Marketing. Then under Channels, tap Amazon. If you need an to update your API key, the following screen displays to prompt you through the process.
Update the Amazon API Key Prompt
Tap Sign in. The Magento Accounts page displays in a new browser tab. If you are logged into your Magento account, the API Portal section of the My Account page displays automatically. If you are not logged it, you are prompted to enter your Magento username and password before the API Portal tab displays.
If you need to create a Magento account, visit here and register. This account should be part of your company or business.
API keys can be viewed and generated on the API Portal tab in your Magento account. If you need to create a new API key, ensure the Environment drop-down is set to "Production." Then enter a description like "Amazon Sales Channel" and tap Add New. The new key is generated and displayed with the name you entered. Tap Copy to copy the new key.
Generate or Copy an API Key
With the new key generated and copied, return to the Amazon Sales Channel browser tab. On the Welcome to Amazon Sales Channel screen, tap Add Key. The browser exits Amazon Sales channel and displays the Magento Services tab in your store configuration page.
Paste the copied key into the Production Api key field.
Tap Save Config. You can now return to Amazon Sales Channel.
Add your API Key in the Magento Services screen in your Store Configuration
On the Admin sidebar, tap Marketing. Then under Channels, tap Amazon. Magento verifies and validates your API key and allows you to continue with setup.
If the verification screen displays again, repeat the process.