AWS Emulator is a local emulator of the AWS APIs that you run on your machine, a development server or in CI.
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The AWS CLI, AWS SDKs and coding agents talk to it over a local HTTPS endpoint with the same API shapes and errors as AWS, so they can create resources, check results and iterate without an AWS account or a deployment.
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Local HTTPS endpoint (127.0.0.1:9297) for the AWS CLI and any AWS SDK
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Built from the same AWS API models as the SDKs, so requests and errors match AWS
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aws-emulator agent skill installed with `aws agent-toolkit add-skill` (AWS CLI 2.35.0 or later)
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Embedded mode for Rust tests with one isolated emulator per test
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Per-service fidelity scores published with each release
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Generates its own credentials, config and certificate on start
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RPM and Debian packages on Linux, Docker on macOS and Windows
Free
AWS Emulator has no additional service fee and its source is released under CC0-1.0. You pay only for AWS resources when you deploy to AWS.
Best for
Developers and coding agents that need to build and test AWS applications in a fast local loop or in CI without touching a real AWS account.
Not ideal for
Production workloads or security testing, which AWS says the emulator is not for, and projects that rely on APIs it does not yet emulate faithfully.
An official, free local AWS emulator with first-class coding-agent support; a strong default for agent-driven AWS development and testing.
Launched on November 11, 2026; AWS says the code was written entirely by autonomous AI agents, and releases ship several times a day (v1.0.336 on November 12, 2026).
As of
Is AWS Emulator free?+
Yes - AWS Emulator is Free. AWS Emulator has no additional service fee and its source is released under CC0-1.0. You pay only for AWS resources when you deploy to AWS.
Is AWS Emulator open source?+
Yes - AWS Emulator is open source. AWS Emulator has no additional service fee and its source is released under CC0-1.0. You pay only for AWS resources when you deploy to AWS.
Who is AWS Emulator best for?+
Developers and coding agents that need to build and test AWS applications in a fast local loop or in CI without touching a real AWS account.
Who is AWS Emulator not ideal for?+
Production workloads or security testing, which AWS says the emulator is not for, and projects that rely on APIs it does not yet emulate faithfully.
What are the best AWS Emulator alternatives?+
The closest AWS Emulator alternatives on ai.dosa.dev are GitAuto, AgentDiff, Agent QA - all listed under AI Testing & Quality Assurance.
Who makes AWS Emulator?+
AWS Emulator is developed by Amazon Web Services. It is listed in the AI Testing & Quality Assurance category on ai.dosa.dev.
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