An identity provider, or OpenID provider (OP) is a service that specializes in registering OpenID URLs or XRIs. OpenID enables an end user to communicate with a relying party. … An identity provider provides the OpenID authentication (and possibly other identity services).

Is Facebook an OpenID provider?

No, they’re not an OpenId provider. They use their own OpenID-like system called Facebook connect, which you can use to authenticate users on your site, among other features.

What is meant by OpenID?

OpenID is an open specification for authentication and single sign-on (SSO). OpenID, which was first created in 2005, allows web sites and authentication services to exchange security information in a standardized way.