It is considered best practice to separate out POST and PUT by PUT being idempotent while POST is not: https://stackoverflow.com/questions/18485621/what-is-mean

It is considered best practice to separate out POST and PUT by PUT being idempotent while POST is not: https://stackoverflow.com/questions/18485621/what-is-meant-by-put-method-idempotent-in-restful-web-service https://stackoverflow.com/questions/18485621/what-is-meant-b.... This allows you to reason better about API calls in code by their HTTP method without having to check the fields sent.