The former Charlton player has been drafted in as a replacement for Darren Randolph, who injured a shoulder in Birmingham's 2-1 home defeat by Bolton on Saturday.
Crystal Palace defender Damien Delaney, who was drafted into the provisional squad earlier this week, remains in the final 23, while striker Jon Walters will be assessed by Stoke's medical staff after being substituted during the 1-0 defeat to Fulham with a groin problem.
Ireland face the Germans in Cologne on October 11 and the Kazakhs in Dublin four days later.
- Sports & Recreation
- Darren Randolph
- Damien Delaney
- Jon Walters