This will effectively limit you to making requests to services that provide an API that supports JSONP. If you're going to do something like this, why not just

This will effectively limit you to making requests to services that provide an API that supports JSONP. If you're going to do something like this, why not just use Heroku or something similar? Unless you're relying solely on external APIs, you're going to need some server space sooner or later. Github is good for static pages, like blogs, but I don't think a web application will work that well.