The Magpies goalkeeper is hoping he can impress manager Alan Pardew enough to provide competition for Tim Krul once the Dutchman returns from injury
The Dutchman is nearing a comeback from an elbow injury which he sustained in September but Harper believes he could still have a part to play in Alan Pardew's side this season due to a congested fixture list.
"Tim's comeback is not too far away, but we do have a lot of games coming up," Harper told the Evening Chronicle.
"We have Robbie [Elliot] here too pushing for a place. He has made big strides forward in the last month or two. Those performances will do him the world of good."
After spending his entire senior career with Newcastle United, Harper is nearing 200 appearances for his club and is ambitious to extend his stay at the club.
"I would like to get to 300, but I cannot see it happening at my age, but 200 would be nice. That is a landmark I would like to get to.
“We've got a long season ahead of us and we know there are plenty of games ahead."