I hate to tell you this but coin base does not let betting sites run off of their API. You can even ask them this yourself. If they did allow betting sites though, my dice game would have been already completed!
And puritanical 'murica strikes again! damnit!
I think I'm going to start working off the inputs.io API, have you had any contact with them?
There is also a team that I saw a month or two ago that is doing the "legal legwork" as a reference for bitcoin gaming startups, but they are still beta...
http://www.arbiter.me/
I think it would be great to have a single site that any gaming startup could go to and could find out what services are gambling friendly, what steps need to be taken to form the business, how much to expect to pay in taxes, etc...
Too bad I'm not a lawyer
