AWS releases AWS Emulator, a local tool for testing AWS APIs offline
AWS has published AWS Emulator, a local program that mimics AWS API endpoints so developers can test code without an AWS account or network calls to AWS. It supports server mode for Linux (via RPM/Debian packages) or Windows/macOS (via Docker), as well as an embedded mode for Rust tests, and can be set up via an AI coding agent skill. There is no extra service fee; users only pay for AWS resources once they deploy to the real cloud.