New AWS Budgets features include API access, usage-based budgets, and more!

Starting today, you can take greater control of your AWS costs and resource usage with the new and enhanced features in AWS Budgets. You can now create monthly, quarterly, or annual budgets for your AWS resource usage (e.g., EC2 instance hours) or your AWS costs. In addition to accessing Budgets via the Billing & Cost Management console, you can now use the new Budgets API to create, edit, delete, and view up to 20,000 budgets per payer account.
Quelle: aws.amazon.com