This topic is kinda old but I am looking for an API of Bitcointalk in order to fetch information about forum users (post counts). Has there an API been released in the meantime?
AFAIK no. You will need to create a parser to fetch details. If you need help, ask Bitcoin_BOy$. He will help you.
In new forum software(Epocktalk), API is available but don't if there is an API for fetching details.