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About IdentityServer4

IdentityServer is a free, open source OpenID Connect and OAuth 2.0 framework for ASP.NET Core. Founded and maintained by Dominick Baier and Brock Allen, IdentityServer4 incorporates all the protocol implementations and extensibility points needed to integrate token-based authentication, single-sign-on and API access control in your applications. IdentityServer4 is officially certified by the OpenID Foundation and thus spec-compliant and interoperable. It is part of the .NET Foundation, and operates under their code of conduct. It is licensed under Apache 2 (an OSI approved license).

For project documentation, please visit readthedocs.

Overview

IdentityServer4 consists of multiple repositories (in addition to this repository):

If you encounter issues or find bugs, please open an issue in this repo here first.

How to build

IdentityServer is built against the latest ASP.NET Core 2.

  • Install the latest .NET Core 2.x SDK
  • Run build.ps1 (Powershell) or build.sh (bash)

ASP.NET Core 1.x

For using IdentityServer with ASP.NET Core 1.x, you can use the 1.x packages of IdentityServer and this branch. Documentation for 1.x can be found here. The 1.x version is not maintained anymore.

Commercial and Community Support

If you need help with implementing IdentityServer4 or your security architecture in general, there are both free and commercial support options. See here for more details.

Sponsorship

If you are a fan of the project or a company that relies on IdentityServer, you might want to consider sponsoring. This will help us devote more time to answering questions and doing feature development. If you are interested please head to our Patreon page which has further details.

Platinum Sponsors

Auth0

Auth0 is an easy to implement authentication and identity management SaaS based on OpenID Connect/OAuth 2.0. Check out their quickstarts here.

Corporate Sponsors

Thinktecture AG
Ritter Insurance Marketing
Alcidion Corporation
Intuit

You can see a list of our current sponsors here - and for companies we have some nice advertisement options as well.

Acknowledgements

IdentityServer4 is built using the following great open source projects

..and last but not least a big thanks to all our contributors!