I Let a Bedrock Agent Watch My AWS Bill for 30 Days. Here Is Everything It Caught, Missed, and Made Up

Short summary

Engineer built a Bedrock Agent that analyzes AWS billing daily, finding forgotten resources and cost drivers better than standard tools. Over 30 days, the agent caught real savings opportunities but also hallucinated (detecting itself as suspicious). Includes full implementation code and honest failure analysis.

• •Bedrock Agent reads AWS Cost Explorer daily and reasons over context to flag inefficiencies—superior to threshold-based CloudWatch alerts
• •Real results: discovered forgotten SageMaker endpoints, NAT gateways, and idle resources; agent also generated false positives on day 16
• •Ready-to-deploy pattern with EventBridge scheduler, Lambda triggers, and SES reporting; all code provided

Generated with AI, which can make mistakes.