'endpoint' originates from English, specifically the compound of the words 'end' and 'point', where 'end' meant 'boundary/limit' and 'point' meant 'a precise location or tip'.

'end' comes from Old English 'end' (from Proto-Germanic *andja), and 'point' comes via Old French 'point' from Latin 'punctum' ('a prick, point'). The compound appeared in later Middle/Modern English as 'end-point' and eventually became the single word 'endpoint'.

Initially it meant simply 'a point at the end', but over time the term has retained that basic sense while also being extended into technical uses (mathematics, computing) to mean boundary points or service access addresses.