Google had implemented OpenID Discovery Spec at https://accounts.google.com/.well-known/openid-configuration which allows developers and users to find the necessary URLs and keys for OpenID authentication.
I was wondering what the Facebook and possibly other (e.g. Microsoft Live) equivalents are so I can use Facebook and others in a standard fashion.
SalesForce also has a discovery URL https://login.salesforce.com/.well-known/openid-configuration
Existing and new users can now link their Facebook accounts with their Gmail accounts or with accounts from those OpenID providers that support automatic login.
In the App Dashboard, choose your app and scroll to Add a Product Click Set Up in the Facebook Login card. Select Settings in the left side navigation panel and under Client OAuth Settings, enter your redirect URL in the Valid OAuth Redirect URIs field for successful authorization.
Well known Configuration URL: The URL that contains metadata about the third-party OIDC identity provider. July 29 at 6:08 PM. Selected Answer. 1.
Here is OpenID Configuration For Facebook
https://www.facebook.com/.well-known/openid-configuration/
Facebook's login mechanism/protocol is not based on OpenID Connect. Facebook uses a proprietary extension of OAuth 2.0 but it is not the standardized one that OpenID Connect specifies. Hence there's no point in expecting Facebook to publish OpenID Connect Discovery documents, unlike Google and Salesforce that do adhere to the standard.
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