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NuGet · #2704 most downloaded on NuGet
The buttoned-up and boring, but deeply analyzed, implementation of Signature Version 4 (SigV4) in .NET.
Last release 9 months ago
07 Jan 2026
Release timing varies
gaps range from 9 days to 13 months
Most releases are documented
notes for 22 of 27 stable releases
Nothing withdrawn
no release was ever pulled
7 years old
28 releases · first in 2019
For release notes, please see the change log on GitHub.
For release notes, please see the change log on GitHub.
For release notes, please see the change log on GitHub.
For release notes, please see the change log on GitHub.
One column per quarter.
For release notes, please see the change log on GitHub.
For release notes, please see the change log on GitHub.
For release notes, please see the change log on GitHub.
For release notes, please see the change log on GitHub.
For release notes, please see the change log on GitHub.
For release notes, please see the change log on GitHub.
For release notes, please see the change log on GitHub.
For release notes, please see the change log on GitHub.
X-Amz-Content-SHA256 header should be present when querying Amazon OpenSearch Serverless (contribution by @JCKortlang and @95horatio)For release notes, please see the change log on GitHub.
For release notes, please see the change log on GitHub.
For release notes, please see the change log on GitHub.
For release notes, please see the change log on GitHub.
For release notes, please see the change log on GitHub.
For release notes, please see the change log on GitHub.
For release notes, please see the change log on GitHub.
For release notes, please see the change log on GitHub.
HttpClient.PatchAsync (contribution by @mungojam)HttpClient.GetStringAsync (contribution by @mungojam)CancellationToken parameter comes last### :syringe: Fixed - #478 Add support for HttpClient.Send on .NET 5 (contribution by @Timovzl)
### :zap: Added - #476 Support for Unity game engine
All properties of class AwsSignatureHandlerSettings have had their access modifiers changed from public to internal, thus the properties have been rem
#458 [BREAKING CHANGE] Improve support for AWS credentials inheriting from Amazon.Runtime.AWSCredentials (proposed by @cliff-wakefield-acurus)
Migration guide
All properties of class AwsSignatureHandlerSettings have had their access modifiers changed from public to internal, thus the properties have been removed from the public API. If you experience a compilation error because of this, please refactor your code to access RegionName, ServiceName and the AWS credentials by other means.
### :syringe: Fixed - #420 Improve error message in exception thrown when region or service name is omitted
HTTP message handler AwsSignatureHandler designed to be compatible with IHttpClientFactory and its request pipeline. For more information about messag
AwsSignatureHandler designed to be compatible with IHttpClientFactory and its request pipeline. For more information about message handlers and their usage, please see HTTP Message Handlers in ASP.NET Web API. (proposed by @torepaulsson)NuGet package does not show an icon
### :zap: Added - #1 Support for S3 (Simple Storage Service)
Improve searchability by adding NuGet tags aws, sign, http and request
aws, sign, http and request### :zap: Added - #36 Support for .NET Framework 4.5
### :syringe: Fixed - #28 Default request headers are added twice on Android using Mono. The behavior on Mono is different from the behavior on .NET F
Nothing published for this version
### :syringe: Fixed - Update XML comments - Update dependencies
Initial version.
Initial version.
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
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