Shelvey was impressive on his debut as the Magpies secured a 2-1 win over West Ham.
The 23-year-old made his debut for his new club during the 2-1 victory over West Ham, and after impressing against the Hammers, he has assured fans to expect complete commitment from him as Steve McClaren's side try to drag themselves out of danger.
"They work all hours of the week to pay for their tickets for the game. It is a pleasure for any player that they want to come and see us. The only way you can repay them is by going out and doing it on the pitch," he told the Chronicle.
"I will play wherever I am told but what I can give to the fans is a bit more creativity and I will always put my foot in.
"I will never shirk a challenge. I just want to work my socks off for the team. Hopefully I can chip in with goals too. I like to get forward and score goals, we’re looking for more belief going forward."
Shelvey was involved in both of Newcastle's goals during the victory over Slaven Bilic's side, and with the club currently situated in the Premier League's bottom three, McClaren will be hoping that the midfielder proves as influential in the coming months.
Judging by his comments, the former Swansea man is prepared to give everything to the cause to ensure that his new side remain in the top flight next season, if nothing else, than to prove to the Swans - who are also involved in the relegation scrap - that they were completely wrong to let him move to a side that they are in direct competition with.
And if he can prove to have the kind of impact that inspires Newcastle on a run that secures their survival in the top flight for another year, then United supporters will have no doubt that Shelvey's £12m transfer fee was an absolute bargain.