There are three ways for applications and websites to integrate with DeviantArt:
We've designed our APIs to use open standards so developers can leverage off-the-shelf libraries. We aim to provide APIs that are as simple as possible yet still open the door to great possibilities.
We can't wait to see what cool things you'll build using these tools!
API usage is covered by our API License agreement.
Once that's done you will be given a client_id and client_secret that can be used to authenticate users and access the API.