How to reduce AWS Marketplace costs by automating AMI subscription monitoring

This article explains how to build an automated AWS Marketplace AMI subscription monitoring solution using EventBridge, Lambda, and SES to track EC2 instance type changes and reduce costs by up to 72%.

• Automates detection of EC2 instance type changes affecting AMI subscriptions
• Hub-and-spoke architecture centralizes monitoring across multiple AWS accounts
• Sends email alerts when subscription amendments are needed
• Uses DynamoDB to store instance state and compare configuration changes
• Deployment via CloudFormation templates for hub and spoke accounts
• Requires Amazon SES email identity verification before sending notifications
• Optional SkipAgreementVerification parameter tracks all instance changes
• Provides human oversight rather than automatic agreement amendments
• Eliminates manual monitoring and reduces operational complexity

The solution helps organizations maintain purchased subscriptions with better discounts than on-demand pricing while automating cost control and reducing manual tracking efforts.