Hunt played for 45 minutes against Chelsea, and the Wolves manager is likely to hand him his first start for the club at Old Trafford.
"He's ready to play," McCarthy said. "He could have started on Saturday, but whether he'd have finished the game or not was another matter. He did well, and had a good impact, like I knew he would."
McCarthy added: "He did everything that I could have asked of him.
"He tracked back against Bosingwa, which is no easy task and I thought his performance was really good."
Hunt was recovering from foot surgery when he signed from Hull in June, and McCarthy said he was always confident that any element of risk involved in the deal was calculated and worth taking.
He said: "We knew what we were getting in terms of him as a player, but also as somebody who was injured.
"He's rehabilitated brilliantly. We guessed it would be October, although we even thought it might be November, so he's probably in front of what we expected.
"He's really, really effective, and has an infectious personality.
"I knew what I was getting when I signed him, I'm just glad now he's able to play and we can get the best out of him over the next few weeks and further beyond."
Source: PA
Source: PA