AWS Emulator

S3, SQS, IAM, and STS emulation with AWS SDK-compatible S3 paths and query-style SQS/IAM/STS endpoints. S3 uploads and downloads preserve arbitrary binary payloads, including raw byte lengths and ETags. All state is in-memory, and responses use AWS-compatible XML.

Start

# AWS only
npx emulate --service aws

# Default port (when run alone)
# http://localhost:4000

Or programmatically:

import { createEmulator } from 'emulate'