open source · MIT
Nostr for builders.
Everything you need to build Nostr software — simple APIs, an efficient core, and a library for every stack.
Why Nostr Dev Kit?
The base layer for building on Nostr.
yours
Your application
Clients, bots, relays, services — whatever you're building.
A library for every stack
One API surface per language, on every runtime you target.
Core
Signing, encryption, and relay communication — fast and memory-safe.
Simple. Fast. Efficient.
Simple APIs backed by an efficient core — minimal memory use and high throughput, even under load.
The building blocks
Keys, events, filters, relay connections — the primitives every Nostr app stands on.
Open source
MIT licensed, maintained in the open, and built for the Nostr ecosystem.
Source code
Find the code where you are.
Documentation
Go deeper in the book.
The book contains installation notes, current APIs, examples, etc.