The versatile defender, 23, can play at both left-back and centre-back and
scouts from a host of clubs have been at Edgeley Park this season to look over him.
The former Scotland youth international is one of a number of players to have been put up for sale by Stockport in order to balance the books.
Championship club Ipswich Town are also believed to be ready to bid for McNulty after watching him on several occasions this season.