According to the 'Daily Mail', Arsenal, Tottenham Hotspur and West Ham are all chasing the signature of the 17-year-old.
Azah has impressed for Cardiff's U18 side, scoring twice against West Ham in a friendly, though Neil Warnock's side may struggle with competition from the three London clubs.
The Irishman, who tends to play as either a winger or more of a central striker, also had trials at Everton and Manchester United, though issues of citizenship got in the way of a deal.
Born in Ghana to Ghanaian parents, Azah now has Irish citizenship so is eligible to sign for English club.
He has featured for both under-15 and under-16 Republic of Ireland squads.