The Leicester City defender has struggled to force his way back into the reckoning at club level and says that he is keen to feature for Ireland
With John O'Shea and Richard Dunne suspended for the game against Germany, St Ledger is among the most experienced defenders in the squad with 36 caps and, having missed a number of recent Ireland games, the 28-year-old says that he wants to be involved in the forthcoming fixtures.
"I was desperate to come over. Noel [King] rang me and asked my how my fitness was," he told reporters. "There are two places and if I work hard this week in training I'll hopefully get a start. You want to be involved as a footballer."
The Boys in Green take on Germany in Cologne on October 11, almost exactly a year after the heavy 6-1 defeat suffered against Joachim Low's side in Dublin and St Ledger praised the quality of his opponents, but stressed that Ireland were seeking a win at the RheinEnergieStadion.
"They're an extraordinary team at the moment, probably the best German team for many years," he said. "Bayern Munich have a good contingent of them and everyone has seen how good they were but you want to test yourself against these players.
"We'll go out there looking to get the win, obviously, but they're very strong so we'll see what happens."
Meanwhile, St Ledger revealed that he has been told he is free to go out on loan as he struggles to reclaim his place in the Leicester City squad.
The defender has featured just twice for the Foxes this season and has found his first-team opportunities limited after suffering a knee injury in August.
"We've got a few centre-halves but the two there have done very well," he said. "It's just a case of training and seeing if I can get my chance.
"They said I can go out on loan so we'll just have to wait and see what happens."