Which REST operation (GET, PUT, or POST) for validating information?

Question

My users enter a few information fields in an iOS app. This information must be validated on my server, which has a RESTful API. After validation the UI of the iOS app chang

Answer 1

I use the same scenario as you and use PUT for it. You have to ask yourself: "when I send the same request twice, does this make a different state on server?" If yes, use POST, if no use PUT.