[micampe]

Can't read the article right now, but for contacts and calendars we have standard public APIs: CardDAV and CalDAV. Too bad Google just discontinued the latter, weirdly enough just a few months after finally supporting the former.

[pyre]

Unless something has changed recently, there isn't much information about Google's CardDAV implementation. I had to find a reference on a mailing list for a CardDAV implementation to even figure out what Google's URL structure looked like.

I couldn't figure out a way to list all contact lists. You had to know the name of the list and use it in the URL. Even at that, you can only access contacts in "My Contacts" or other groups. There's (seemingly) no way to access "All Contacts".

CardDAV is 'supported,' but not very well. It's definitely a second-class citizen.