But you can stick a REST API onto WordPress. Several plugins have a JSON API, there is Hookpress, it's also not very hard to roll your own restful code. It also

But you can stick a REST API onto WordPress. Several plugins have a JSON API, there is Hookpress, it's also not very hard to roll your own restful code. It also has XML-RPC Support which is an alternative to REST. It's actually quite simple to provide "static" outs for WordPress and the benefit is the client gets a nice easy to use admin. It's not the best thing in the world or anything, but it works.