# Amazon Security Token Service SDK > _Warning:_ This is an experimental preview release which is still under heavy development and not intended for public consumption, _caveat emptor_! * [Description](#description) * [Contribute](#contribute) * [Licence](#licence) ## Description The AWS Security Token Service (STS) is a web service that enables you to request temporary, limited-privilege credentials for AWS Identity and Access Management (IAM) users or for users that you authenticate (federated users). Documentation is available via [Hackage](http://hackage.haskell.org/package/amazonka-sts) and the [AWS API Reference](http://docs.aws.amazon.com/STS/latest/APIReference/Welcome.html). ## Contribute For any problems, comments, or feedback please create an issue [here on GitHub](https://github.com/brendanhay/amazonka/issues). > _Note:_ this library is an auto-generated Haskell package. Please see `amazonka-gen` for more information. ## Licence `amazonka-sts` is released under the [Mozilla Public License Version 2.0](http://www.mozilla.org/MPL/). Parts of the code are derived from AWS service descriptions, licensed under Apache 2.0. Source files subject to this contain an additional licensing clause in their header.