AWS releases a local AWS API emulator
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AWS has released a local AWS API emulator, aws-emulator, letting developers run tests against locally emulated services without an AWS account or a paid API key. According to MarkTechPost, the emulator covers 200+ services and is built on 438 AWS API models, with all code written and reviewed by autonomous agents; Simon Willison says that in the project's first three weeks, a large number of agents submitted 29,684 commits. On the runtime side, Linux x86_64/aarch64 can install RPM or Debian packages directly, while macOS and Windows currently require running via Docker, with a 2 GiB memory limit; building from source requires 100 GB of free disk space. MarkTechPost also says telemetry is enabled by default. The project author hopes to offer a single binary in the future.
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- MarkTechPostAWS Releases AWS Emulator: A Local Copy of 200+ AWS Services Built by AI Agents
AWS has released AWS Emulator, a free, CC0-licensed local emulator of AWS APIs that runs on a laptop, dev server or in CI without an AWS account, built from 438 AWS API models covering 200+ services. Its code was written and reviewed entirely by autonomous agents, and release v1.0.322 passes 24,243 of 42,857 scored fidelity tests (56.6%), with KMS at 93.9% and CloudFormation at 15.8%. AWS lists limitations including no IAM evaluation, a single region and account, in-memory short-lived resources, and telemetry on by default.
- Simon Willisonaws-emulator
AWS has released an official emulator for running tests against a local clone of its services without provisioning a paid API key. It is written in Rust and accumulated 29,684 commits in its first three weeks, with Swaminathan Sivasubramanian describing its origins in a guest post on Werner Vogels' blog. It currently requires Docker on macOS and Windows, and the author hopes a single downloadable binary will follow.
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