Can the Apple Id be used by non Apple applications?

Question

Both Google and Facebook can act as Identity Providers in a security federation setup like Ping Identity or Microsoft ACS.

Does anyone know if it is possible to add Apple Id as an identity provider?

Answer 1

After investigating sources over at apple.com and google, I must conclude that this is not possible now.

Hopefully, Apple will become and OpenID provider soon.

Answer 2

Apple does not currently provide an API through which one can use AppleID or iCloud as an identity provider.