NIP-99

Classified listings

NIP-99 describes classified ads and listings. It gives apps a common way to publish offers, wants, and marketplace posts.

NIP-99 is one of the small agreements that lets different Nostr apps understand the same kind of activity. In everyday terms, it is like agreeing on the shape of a form: once everyone uses the same form for classified listings, people can move between apps without losing the meaning of what they created.

Read more in the official 99.md NIP document.