The proceeds will benefit match organisers the Newcastle United Foundation and two other principal beneficiaries, the Great North Children's Hospital and the Sir Bobby Robson Foundation.
Harper said: "It was an incredible night. I'd like to say thank you to everyone who came along to St James' Park to be a part of it and for making it so special.
"It was a privilege to be on the same pitch as some of the greatest players to have ever played the game and, more importantly, the match raised money for charities which are very close to my heart.
"I'm delighted that those funds will enhance the amazing work they continue to do for people right across the north-east."