1. Go to Amazon Associates > Tools > Product Advertising API
2. Go to “Manage Your Credentials” > Manage Credentials
3. It’ll redirect you to the AWS login page, proceed further to access this page:
Here click on the “Acess keys” to check your existing API keys, you can either use them (if you know the Secret Key) or click on “Create New Access Key” button.
4. That’s all! Here you can access your Amazon Product Advertising API Access Key and Secret Key!
Copy them and store them in a safe place. Download the “Key” file as well. If you have any queries, let me know!