Where is Blizzards official World of Warcraft API?

Question

I want to know if I can access World of Warcraft in an API.

My requirements are very precise:

1. MUST be official blizzard API
2. MUST be accessible out-of-game.

Answer 1

Blizzard has now released a Community API that allows you to fetch information directly from the Blizzard Services; such as Realm Status, Player and Auction data.

https://dev.battle.net/io-docs

I don't think that this was what the original question was intended for, but I think this can help other people searching for similar information.

Answer 2

Depends on what you are trying to do, here's the wiki on it

http://www.wowwiki.com/World_of_Warcraft_API