3 of 3 cards free · no sign-in needed
Records every API call in your AWS account: who called it, from where, when, and what changed. Enables compliance auditing, security investigation, and change tracking. 90-day history free; longer retention via S3.
5 check categories: Cost Optimisation (underused resources), Security (open ports, MFA), Fault Tolerance (Multi-AZ, backups), Performance (EC2 sizing), Service Limits (approaching quotas). All accounts get basic checks; Business+ get all checks.
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