The Messenger of Allah ﷺ was cupped and paid the cupper his fee. Had it been unlawful, he would not have paid him.
عبد الأعلى عن خالد عن عكرمة
احتجم رسول الله ﷺ وأعطاه أجره ولو كان حراما ما أعطاه
Its isnad is sahih, and it is a repetition of 3085.