The 37-year-old will be between the posts for the Wear-Tyne derby against Sunderland at the Stadium of Light on October 21 . if No1 Tim Krul fails to prove his fitness.
Harper has been dubbed “Cocoon” by goalkeeping coach Andy Woodman after rolling back the years this season.
The Easington-born player, in his 15th first-team season at the club, would love to make it to 200 career appearances for Newcastle.
Steve Harper: “I’d like to get to 300.
“But I can’t see it happening at my age!
“That (200 appearances) would be nice – that’s certainly a landmark I’d like to get to.
“Tim’s comeback is not too far away, but we do have a lot of games. We’ve got a long season ahead of us.
“Robbie’s made big strides forward in this last month or two. Those performances will do him the world of good.”