Using the JSON API via HTTPS and HTTP

You can serve your site on both protocols http and https. This might be problem if you care about SEO (duplicate content).

You can use 301 redirection to force users to be redirected from http to https. Old app will be slightly slower because of redirection but it will be working. This might be problem if you use POST requests. There is 307 redirection but I don’t have any experience with it.