Re:Idempotence: What is it and why should I care?
by haswell on Tuesday August 21, 2018 @08:28AM
(#17808931)
For HTTP resources, this is addressed in RFC7231 - essentially, servers may implement non-idempotent behavior such as logging for methods otherwise considered idempotent.
https://tools.ietf.org/html/rfc7231#section-4.2.2