I'm the co-founder of IndieWebCamp, I maintain oauth.net, write and consult about OAuth, and am the editor of several W3C specifications. You can read more about me at aaronpk.com.
References from the community
Learn the basics of OAuth 2.0, and how you can take advantage of it when building your API.
BackgroundI've written a book on building OAuth servers, and given talks on OAuth around the world.