You can find documentation to help you use the API here:
http://developer.wordpress.com/docs/oauth2/
http://developer.wordpress.com/docs/api/
You can also follow the Developer blog to get updates about the API, and find some examples of how the API can be used:
http://developer.wordpress.com/blog/
Hello Jeremy,
Thanks for your quick response. Didn’t read the oauth2 page.
Stuck at the authorization endpoint:
“Someone may be trying to trick you into giving them access to your site. Or it could be you just encountered a bug :). Either way, please close this window.”
If you think you found a bug in the oauth2 process, could you contact us via this contact form, and give us more information about your setup?
https://developer.wordpress.com/contact/
Thanks!