OpenID Connect is a simple identity layer built on top of the OAuth 2.0 protocol, which allows clients to verify the identity of an end user based on the authentication performed by an authorization server or identity provider (IdP), as well as to obtain basic profile information about the end user in an interoperable and REST-like manner. OpenID Connect specifies a RESTful HTTP API, using JSON as a data format.

OpenID Connect is an increasingly common authentication protocol: when an app prompts you to authenticate using your Facebook or Google+ credentials, the app is probably using OpenID Connect.

OpenID Connect allows a range of clients, including web-based, mobile, and JavaScript clients, to request and receive information about authenticated sessions and end-users.

OneLogin provides a custom connector option that makes it easy to configure your OpenID Connect-enabled app to use OneLogin as the Identity Provider (IdP) in an OpenID Connect flow.

For more information about API authorization, see How to setup an API Authorization PoC.