Honestly, sounds like micro.blog and how I use it. Most importantly, micro.blog uses Micropub, an existing W3C standard API for blogging which is why things like Drafts, iAWriter, MarsEdit etc can all support it.
Don’t get me wrong, this is a very cool project and it looks like you’ve done a great job. I would recommend looking into Micropub support though rather than role your own API. The IndieWeb group has worked hard and built up a lot of easy to use and powerful standards around this stuff.