To get started, all you need to do is to provide an Amazon S3 bucket for your billing data, give the AWS Billing system permission to write to it, and visit the Billing Preferences page to enable programmatic access:
Once you have done this, we will generate an Estimated bill several times per day and store it in the bucket, where you can download and process it as desired. We will also generate a Final bill at the conclusion of each billing period.