aws-sdk-signers

What it is and what it does

AWS SDK Signers for Python is a standalone library that handles SigV4 request signing—the AWS authentication mechanism for HTTP requests. Rather than embedding signing logic in a full SDK, it provides two high-level signers (SigV4Signer for synchronous code and AsyncSigV4Signer for async) that work with any HTTP library: Requests, urllib3, AIOHTTP, Curl, or Postman. You supply a request object, AWS credentials, and signing properties (service name, region, optional date and flags for payload signing and URI encoding), and the signer applies the cryptographic signature and required headers.

The package is currently in Pre-Alpha, meaning the API and behavior may change between minor versions as the maintainers collect feedback. It has no external runtime dependencies, making it lightweight to add to existing projects. It requires Python 3.12 or later and is actively maintained, with the last commit on 2026-08-13.

Use it for:

• Sign requests to AWS services when using a non-SDK HTTP client or custom request pipeline.
• Integrate AWS authentication into tools like Postman or Curl without pulling in a full SDK.
• Build async applications that need to sign requests to AWS without blocking I/O.
• Create custom AWS API clients that need fine-grained control over request signing and headers.
• Test or debug AWS API calls by manually constructing and signing requests.

Worth the install?

AI-flagged interpretation of the facts on this page — verify before relying

Provides standalone SigV4 request signing for AWS HTTP requests, compatible with libraries like Requests, urllib3, AIOHTTP, and Curl.

Yes, if you need standalone SigV4 signing and can tolerate Pre-Alpha stability. The low install friction, active maintenance, permissive license, and zero runtime dependencies make it a practical choice for projects that want signing without a full SDK dependency. Pin to a minor version and review changelogs before upgrading.

Install

aws-sdk-signers on PyPI

pip install aws-sdk-signers

uv add aws-sdk-signers

poetry add aws-sdk-signers

Installing aws-sdk-signers

Before you install

Low install friction with no runtime dependencies. Active maintenance as of 2026-08-13, but in Pre-Alpha development phase with acknowledged potential for breaking changes between minor versions—pinning to a specific minor version is recommended.

License in practice

Licensed under Apache License 2.0 (permissive), allowing commercial and private use with minimal restrictions.

Quickstart

pip install aws-sdk-signers

from aws_sdk_signers import SigV4Signer, SigV4SigningProperties, AWSCredentialIdentity, AWSRequest

signer = SigV4Signer()
props = SigV4SigningProperties(service='s3', region='us-west-2')
creds = AWSCredentialIdentity(access_key='...', secret_key='...')
request = AWSRequest(method='GET', url='https://...')
signed_request = signer.sign(request, props, creds)

Requires Python 3.12 or later.

Verify before relying

• Whether AsyncSigV4Signer is production-ready or also carries Pre-Alpha stability caveats.
• Whether payload_signing_enabled and content_checksum_enabled defaults (True) are appropriate for all use cases.
• Scope and frequency of breaking changes expected during Pre-Alpha phase.

Package facts

Evidence: aws_sdk_signers-0.3.0-py3-none-any.whl

Keywords: amazon, aws, http, sdk, signing, sigv4

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