Yes, I was recently looking for something similar and came across this review -
https://nocramming.com/ai/contentdetector-ai. Everything is quite clearly described there. In general, the service is really free and convenient, but, as they say in the article, the accuracy leaves much to be desired. It can confuse human text with AI-generated text and vice versa. That is, if you need a 100% guarantee - I advise you to look at the article, it explains in detail what to expect.