Subreddit rules checker
Every community gates promotion differently, and moderators don't warn, they ban. Type a subreddit and get its posting requirements, read from the community's own published rules.
Deterministic extraction from the published rules, no AI guessing. Unknown means the rules don't say, not that you're safe.
Posting requirements
The community's own rules
Launchpat checks a community's self-promo policy before drafting a reply there, and won't draft a promotional reply where it's banned. Karma, age and flair minimums are yours to clear first.