AWS releases free local emulator for 200+ services
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AWS has released AWS Emulator, a free local emulator of its APIs that runs on a laptop, dev server or in CI without an AWS account or service fee. According to MarkTechPost, the code was written and reviewed by autonomous agents, built from 438 AWS API models covering 200+ services, and passes 24,243 of 42,857 scored fidelity tests (56.6%) in release v1.0.322, with AWS KMS at 93.9% and AWS CloudFormation at 15.8%. It runs on Linux x86_64/aarch64 via RPM or Debian packages, or in Docker on macOS and Windows with a 2 GiB memory limit; source builds need 100 GB of free disk. AWS lists clear limits: no IAM policy evaluation, one region and one account, in-memory short-lived resources, and telemetry on by default. An earlier account by Simon Willison, citing a guest post by Swaminathan Sivasubramanian on Werner Vogels' blog, said the Rust-written project accumulated 29,684 commits in its first three weeks and required Docker on macOS and Windows; Willison said he hoped a single downloadable binary would follow for standard test suites on other platforms and languages.
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- MarkTechPostAWS Releases AWS Emulator, a Local Emulator of 200+ AWS Services Written by AI Agents
AWS has released AWS Emulator, a free local emulator of AWS APIs that runs on a laptop, dev server or in CI without an AWS account, and all of its code was written and reviewed by autonomous agents. It is built from 438 AWS API models covering 200+ services and passes 24,243 of 42,857 scored fidelity tests (56.6%) in release v1.0.322, with AWS KMS at 93.9% and AWS CloudFormation at 15.8%. AWS lists clear limits: no IAM policy evaluation, one region and one account, in-memory short-lived resources, and telemetry on by default.
- Simon WillisonAWS releases official local emulator for testing its services without a paid API key
AWS has released an official emulator that lets developers run tests against a local clone of its various services without provisioning a paid API key. The emulator is written in Rust and accumulated 29,684 commits in the project's first three weeks, according to a guest post by Swaminathan (Swami) Sivasubramanian on Werner Vogels' blog. It currently requires Docker on macOS and Windows, and Simon Willison hopes a single downloadable binary will follow for use in standard test suites on other platforms and languages.
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