More details are on our GitHub here:

GitHub

nostr.build/api at main · nostrbuild/nostr.build

FOSS version of nostr.build. Contribute to nostrbuild/nostr.build development by creating an account on GitHub.

If you are using it for any type of business, I recommend purchasing a business acct to protect and have easy access to your media, stats, etc. If you want to use the free API, just adhere to our ToS, and basically we can delete any free media for any reason, although we only delete po*n.. Enjoy!