I'd imagine that would break the rules of most sites. It would probably explain why you are having a hard time finding one.
Actually, looking at the pokerstars site for example, they have a page on this.
https://www.pokerstars.uk/poker/room/prohibited/
Under In general, what kinds of tools and services are prohibited?
it mentions..
Any tool or service that offers real-time commentary or advice on the current game state that goes beyond reporting data and statistics.
Which would be what you are after no?