Learn about the protocol

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Nostr.how – A comprehensive guide to all things Nostr. Including step-by-step setup guides and details on clients, relays, and NIPs.
Nostr.com – Learn about Nostr: A simple, open protocol that enables a truly censorship-resistant and global social network.

Nostr Github – Nostr is notes and other stuff transmitted by relays. View the source code and learn about the protocol at a deeper level.
Nostr NIPS Github – NIPs stand for Nostr Implementation Possibilities. They exist to document what may be implemented by Nostr-compatible relay and client software.
Nostr Dev Kit – The fastest way to build with Nostr.
Nostr Design – Comprehensive resources and guide to help you design better clients.
Nostr Workshop – View Super Testnet's Nostr Workshop videos and learn how to build a nostr app, how to connect and listen for messages, and more.

Why Nostr Matters – Nostr is a new protocol for censorship resistant speech and social sharing. It has great potential but has plenty of challenges to overcome.
Why we need Nostr – Why Nostr and the broader idea of decentralizing the internet is an important concept.