However, the move appears unlikely as the Potters do not have the money to finance a move for Butler, a player held in high regard by manager Alan Pardew.
Butts, formerly of Cambridge United, has been playing in the reserves in recent weeks after a downturn in form.
Despite the relegation to the second team the 28-year-old is happy at the club and there has been no bust-up between him and Pardew.
Butler's agent, Paul Martin confirmed: "Martin Butler wants to play and be a part of the side so he is disappointed when he is left out.
"There are no problems between him and the manager, all he can do is train hard and with the right attitude in the hope that he will get back in the team."He has been banging the goals in for the reserves and he just has to keep doing that and he will get his place back. He is just waiting for his chance."