Idempotence is a fancy word for being able to repeat an operation without changing the outcome. You seem to think that it's important to make the specific byte

Idempotence is a fancy word for being able to repeat an operation without changing the outcome. You seem to think that it's important to make the specific bytes of an http request-response idempotent. I think that it's important to make a business operation idempotent. You're missing the forest for the trees.