Are there ready-made solutions for automatic recognition of "adult" content?

Question

Computer networks

There is a task - to protect themselves from the publication of adult content on their sites.
Are there services on the web that help recognize text and graphic content of this kind?
There is a lot of user-generated content on the site, there is no pre-moderation, so theoretically everything is possible.
And these are at least potential problems with advertising networks.
I would like to find a ready-made solution to which you can feed the url, and in return it will give you a percentage of the probability that this content is problematic.

Answer 1

On ruseller, they recently analyzed a similar task
Prohibiting image upload ...