THE REGISTER
Every portal the harvester knows about, with the API endpoint it calls and the rate limit it holds itself to. Being on this list means the endpoint was verified by hand when the entry was added. It is not a claim that the portal is reachable right now: no live availability checks are published on this site.
REQ/MIN is the politeness ceiling we configure for ourselves: we crawl at most that many requests per minute against each portal. It is not an observed rate.