IdentityModel is a family of libraries for building OAuth 2.0 and OpenID Connect clients.
Base library for OIDC and OAuth 2.0 related protocol operations and constants and other misc helpers (.NET Standard 2.0 / .NET Framework >4.6.1).
ASP.NET Core specific helper library for token management.
OAuth 2.0 token introspection authentication handler for ASP.NET Core.
.NET based implementation of the OAuth 2.0 for native apps BCP. Certified by the OpenID Foundation.