the most common one being tinfoil website(I can think you can download as a json/db), and in term of similar to NPS, there isn't one due to how much more litigious Nintendo for switch compare to how Sony is to vita, as for my statement about switch focus, is mainly cover scanning of my physical collection(around 2100+ switch games as of right now)
https://cdn.switch-images-julio.com/ and hash dumping to No-Intro for hashes+checksum, since is too dangerous to put actual switch dumps anywhere online