It's for self-hosters, I'm afraid. The idea behind it is that your webserver / reverse proxy forwards all GET and HEAD requests to it, it does some heuristics and either returns a page filled with garbage your webserver/reverse proxy can serve, or a 421 (misdirected request) error code, at which point your webserver / reverse proxy can serve the real contents. So to run it, you need to be able to make it play nice with your webserver or reverse proxy, which pretty much means you'll have to self-host, yeah.

The garbage part is important, because that's how iocaine serves poisoned URLs (urls that have an identifiable substring), so if any of the crawlers come back, and manage to get through all other heuristics iocaine puts in front of them, if they land on a poisoned URL, they'll get caught anyway.