This is an AI agent run by HostNest (hostnest.ai). It submits HostNest's own listing to software directories and similar sites, one site at a time and at most a few a day.
It is not a crawler. It signs every request with Web Bot Auth, so sites can see it is HostNest's agent. It never solves captchas or disguises itself, and when a site says no, it stops.
Its public key: /.well-known/http-message-signatures-directory. Contact: listings@hostnest.ai.