Demo Day Projects
Every Friday, participants showcase what they've built during the week. These are the real projects that emerged from our intensive collaboration and experimentation sessions.
HIGHLIGHTS
Blossom
A specification for HTTP endpoints that allow users to store blobs of data on publicly accessible servers
npub.cash
A nostr native Lightning Address service that provides Lightning addresses for everyone using Cashu eCash
NIP-54: Wiki / Wikifreedia
A nostr-native wiki system that embraces multiple perspectives instead of enforcing a single canonical truth. Born at SEC-01 as Wikifreedia, now standardized as NIP-54.
Zapstore
Zapstore is the first permissionless app store powered by open standards and your social graph
NIP-60
Nostr protocol extension for Cashu wallet functionality, enabling seamless eCash transactions within nostr applications.
NIP-61
Nutzaps: Receiving—and verifying— zaps, has always been a weak point in nostr. Nutzaps have enabled a new, more straightforward and verifiable way to participate in the zap-economy.
Nsite
Host static websites on Nostr using blossom servers for storage and nostr relays for mapping
Tollgate
Freedom-enhancing internet infrastructure with four core modules: Merchant (e-cash payments), Valve (captive portal access control), Crows Nest (gateway discovery), and Janitor (updates via NIP-94). Successfully deployed at multiple events and now focusing on automated router-to-router payments and improved mobile clients. Demonstrates that free markets with small, frequent payments using bearer assets are the most efficient way to connect devices.
“Any task in life is easier if we approach it with the one at a time attitude. ... To cite a whimsical saying; 'If you chase two rabbits, both of them will escape.' No one is adequate to do everything all at once. We have to select what is important, what is possible, and begin where we are, with what we have. And if we begin and if we keep going the weight, the worry, the doubt, the depression will begin to lift .... We can't do everything always, but we can do something now, and doing something will help to lift the weight and lessen the worry, 'The beginning,' said Plato, 'is the most important part.'”
— Richard L. Evans
SEC-00
Highlighter
A nostr client & NIP for sharing and discovering highlights from books, articles, and more.
Lightning Prisms
Programmable value splits for Lightning payments. See blog post for details.
NIP-90: Data Vending Machines
Nostr protocol extension for on-demand computation and data vending. See NIP and reference site.
“What one needs to do at every moment of one's life is to put an end to the old world and to begin a new world.”
— Nikolai Berdyaev, The Beginning and the End (1947)
SEC-01
Alphaama
Just a nostr fucking client
Blossom
A specification for HTTP endpoints that allow users to store blobs of data on publicly accessible servers
Blossom Drive
A cloud drive built using blossom servers and nostr for decentralized file storage
Confidential computing research
Non-exhaustive research notes of building blocks for a better, more decentralized internet.
featurestr-bountiestr
Feature request and bounty system built on nostr protocol
GitPear
Git-based collaboration tool with nostr integration
go-dvm
Go implementation of Data Vending Machine (DVM) for nostr
Gonuts
Cashu mint implementation in Go for eCash functionality
keyNest
Secure key management solution for nostr and Bitcoin
LowEnt
Low entropy key generation and management tool
Malware DVMs
Data Vending Machines for malware analysis and security services
NIP-66
Relay monitoring and discovery specification for nostr network health
Nostr-idb
Collection of helper methods for storing nostr events in IndexedDB
Nostrocket
Non-custodial coordination layer for sovereign individuals. Connects proof of work directly to satflow without any entity controlling resources. Replaces the company model with a protocol for allocating time and resources towards shared goals.
noStrudel on StartOS
noStrudel nostr client packaged for StartOS self-sovereign computing platform
Note Duel
Wager nostr notes on real-world outcomes using DLCs. Pick a Superposition oracle event, choose your side, and write winning/losing notes — cryptographically enforced smart contracts decide which note gets published from your profile.
npub.cash
A nostr native Lightning Address service that provides Lightning addresses for everyone using Cashu eCash
nsecBunker on StartOS
nsecBunker remote signing service packaged for StartOS platform
Wasm DVM
WebAssembly-based Data Vending Machine with plugin system
NIP-54: Wiki / Wikifreedia
A nostr-native wiki system that embraces multiple perspectives instead of enforcing a single canonical truth. Born at SEC-01 as Wikifreedia, now standardized as NIP-54.
Zapstore
Zapstore is the first permissionless app store powered by open standards and your social graph
“Just because we have taken one step down a wrong road is no reason why we have to take two.”
— Richard L. Evans
SEC-02
cypher.space
Privacy-focused communication and collaboration platform
Kartapio
Restaurant menu and ordering system with Bitcoin payments
NIP-60
Nostr protocol extension for Cashu wallet functionality, enabling seamless eCash transactions within nostr applications.
NIP-61
Nutzaps: Receiving—and verifying— zaps, has always been a weak point in nostr. Nutzaps have enabled a new, more straightforward and verifiable way to participate in the zap-economy.
Nostr Safebox
Nostr Safebox is the concept of a ‘safebox’ for Nostr. It’s a generalization of the wallet concept for storing secure, private personal information.The idea is that the safebox contains different item types, wallets, records, etc. You can give a client access by providing the nsec of the safebox. If you no longer trust the client, you can transfer the data to another safebox and delete the current one (no guarantees on deletion, of course)
Nsite
Host static websites on Nostr using blossom servers for storage and nostr relays for mapping
OpenBalance
Open-source accounting and financial management platform
PubPay
Public key-based payment system for seamless Bitcoin transactions
SatShoot
Freelancing on nostr
Shopstr
Decentralized marketplace with NIP-60/61 Cashu integration
Sigit
SIGit is a secure, private and decentralised document signing tool built on Nostr and Blossom
Sov.Biz
Sovereign business platform for decentralized commerce
Tollgate
Freedom-enhancing internet infrastructure with four core modules: Merchant (e-cash payments), Valve (captive portal access control), Crows Nest (gateway discovery), and Janitor (updates via NIP-94). Successfully deployed at multiple events and now focusing on automated router-to-router payments and improved mobile clients. Demonstrates that free markets with small, frequent payments using bearer assets are the most efficient way to connect devices.
SEC-03
Athenut
Privacy-preserving Web Search Powered by Kagi & Cashu
Bolt12 prisms
Lightning Network payment splitting and distribution system
mimoty
A personal relay which is also a remote signing service for nostr
Nostr-based Tollgate
Decentralized internet access using nostr for communication and discovery. Enables mesh network adoption by transferring infrastructure costs to users permissionlessly. Uses captive portals and MAC address tracking to allow anonymous internet access while still enabling proper accounting of purchased access.
nostr-epoxy
Reverse proxy for nostr relays with enhanced performance and caching
note mixer relay
A Nostr relay that mixes and anonymizes events using the Khatru framework.
Novia
Nostr Video Archive - a service to build a video archive using yt-dlp, indexes all videos, and publishes metadata as NIP-71 video events. It allows users to request archived videos from Novia instances (using a DVM) to watch videos from the decentralized archives.
Nutstash Design
User interface design for Cashu eCash wallet applications
Nutstash v2 Re-Design
Multi-mint Cashu wallet rebuilt from scratch. Send ecash to nostr keys, backup via nostr, contacts and chat built in. Multi-platform, self-custodial, privacy-first.
Safebox
Secure storage solution for Bitcoin and nostr keys
SATS’N’FACTS Website
Bitcoin technical unconference in Thailand. Hackathons, art exhibitions, and community events bringing together Bitcoin and Nostr builders in Asia. Bitcoin ticketing and merch store powered by LNbits.
TollGate Branding and Landing page
Branding, design, and landing page for TollGate — the pay-as-you-go Bitcoin ecash WiFi network. No KYC, no subscriptions, no sign-ups. Share your internet with your community and earn sats.
Totem
Decentralized identity and reputation system
SEC-04
NextBlock
Sovereign digital infrastructure project. Includes the PROMO Protocol (attention marketplace on Nostr), Billboard (ethical advertising where people price their attention in Bitcoin), and Telescope (Bitcoin-based temporal system).
Cassette
WASM-based Nostr relay implementation for the Cassette platform
castr.me
Effortlessly turn any npub into a podcast feed.
DVMCP
Bridge implementation that connects Model Context Protocol (MCP) servers to Nostr's Data Vending Machine (DVM) ecosystem
gitworkshop.dev
Nostr-native git collaboration platform for code review and patch management, built on ngit
Hypernote Stories
Instagram Stories on Hypernote
Nescrow
Open Escrow Protocol where an Escrow is a client, doesn’t need to run LN infrastructure with Escrow discovery, ratings & reviews.
next.nostr.watch
Next-generation nostr relay monitoring and analytics platform
NIP-37
Transport method announcement. A way for services to decouple from a single network or protocol.
nostr wallet app
Mobile wallet application with Cashu eCash integration
nsite manager
Management interface for nsite static website hosting
nutmoji
Cashu eCash wallet with emoji-based token representation
Olas
Photo-sharing client on nostr.
Plebeian Market
A content management system and marketplace that provides normies and communities infrastructure for circular economies and the move towards localisation
Receipt.Cash
Scan and split fiat receipts with bitcoiners. Pay the fiat volunteer back in Lightning or Cashu
rust-multiplatform
Rust framework for building cross-platform applications
sec.membler.club
Community platform for Sovereign Engineering cohort members
soveng/nsite
Auto-deploy your GitHub page to nsite
spryte
Lightweight nostr client library and toolkit
TENEX
Orchestrate the orchestrators. Autonomous, agentic learning through distributed cognition through nostr.
wavefunc.live
Internet radio registry on nostr with music recognition and other nostr native social features.
wifistr
Open wifi map on nostr
SEC-05
Backyard Explorer
An example search app for window.nostrdb
Beacon
AI and Bitcoin stuffed in chat apps, WhatsApp/Signal/Qual using ContextVM
bitcoin-nostr-relay
A Rust library for relaying Bitcoin transactions over Nostr
Blob Box
Simple blossom server built for UmbrelOS
BloVM
Blossom server monitor & indexer with blob health checks, also uses ContextVM
Boris
Nostr-native reading and highlighting app. Bookmarks, social highlights, zap splits, offline-first with local relay support.
ContextVM
A protocol that bridges Nostr and Model Context Protocol (MCP) to enable decentralized access and exposure of computational services. Provides SDK for JavaScript/TypeScript with core modules, transports, proxy, gateway, relay, and signer components.
Craig David
Get roasted by Craig David(AI), because no matter what, he's having a better week than you
Earthly.city
Maps stitched, stored, and served as blobs
FIPs
Fuck IPs using bloom filters
Frontier Browser
The Web is Dead, Long Live the Web! A browser built from the ground up
hashpool
Improvements on hashpool - mining pools, eHash & Cashu
Hypernote
Main idea of the hypermedia system built on Nostr. Includes Stories (story feature extension), Elements (UI elements library), OS (imagined as an operating system), and Pages (component-oriented version using zig-mdx and zig-nostr-loader for building reactive Nostr applications)
Innpub
Location sensitive voice meetup app using MoQ
Local++
Mobile app for local LLM models with dynamic online/offline switching using Routstr/OTRTA
Marmot Chat
Audio/video calls using Nostr IDs with E2EE and MLS, MOQ for data transfer
NEET
P2P calls via Nostr using Iroh for hole punching
noDNS
DNS over Nostr
noDNS BIP353 & BOLT12
BIP353 & BOLT12 payments over noDNS
Nostr Bucket
Browser extension that provides a nostr event cache to all web apps
Nostr Gatekeeper
A nostr connect bunker that actually works
Nostr Globe
Privacy-first 3D globe visualization of upcoming Nostr events. Interactive filtering by date, radius, tags, and keywords. No trackers — data fetched directly from configured relays.
NUT-XX: Deterministic NUT-13 Derivation Paths
Cashu NUT proposal for deterministic NUT-13 derivation paths
NUT-XX: Mining Share Payment Method
Cashu NUT proposal for mining share payment method
Nutoff
Cashu wallet using ContextVM for remote access
Opencode UI
Web companion for managing remote opencode instances
OTRTA (Routstr client)
Openrouter over Nostr using Cashu for selling local/API compute in a self-custodial manner
Paygress
VM provisioning and VPN purchasing over Nostr with Kubernetes integration
Retired in a field
Solving developer funding using ContextVM
Routstr
Protocol to buy and sell LLM compute using Cashu payments over Nostr
Seekstr
Nostr media event summarizer and transcription service. Indexes multimedia content from relays and makes it searchable.
Spotstr
Maps on Nostr with encrypted group sharing of locations and importing BTCMaps data
Wally
Desktop native wallet with NWC
Window.nostrdb.js
A polyfill for window.nostrdb
Wingman
AI Development remote assistant app, which now can use many LLM providers
Zig MDX
An MDX (Markdown with JSX) tokenizer and parser written in Zig
Zig Nostr Loader
A WASM-first Nostr event loader built with Zig, designed for high-performance caching and deduplication
SEC-06
nihao
Nostr identity setup and health-check CLI. Creates a complete Nostr identity (keypair, profile, relay list, DM relays, lightning address, Cashu wallet) in one command. Audits existing npub health with a 0–8 score. Single Go binary, non-interactive, agent-friendly. Also available as an OpenClaw skill.
One Npub
Single npub backed by FROST threshold signatures. Distributes key shares in a 2-of-3 multisig style for nostr identities. If one share is compromised, rotate shares while keeping the npub safe.
Nomen
Persistent, searchable memory for AI agents using nostr as the sync layer. WoT-integrated with five visibility tiers from public to agent-private, hybrid search combining semantic vectors and full-text, and sleep-inspired consolidation. Works as MCP server, Context-VM, or embedded Rust library.
Fleetgner
Delegated nostr signer that runs as an MCP server. Granular access controls where admin grants specific users permission to sign with specific keys, with optional policies constraining what can be signed. NIP-46 support for existing clients plus CVM/MCP tools for agents.
Nostr Signal
Discover and rank trusted local businesses using nostr reputation signals. Combines activity mentions, endorsements, and zaps with customisable weights. Client-side posting via nostr browser extensions, no server needed.
Chatstr
Sane defaults for nostr. Apps pull defaults from your nostr activity or your web of trust for a better, customized experience with fewer footguns.
Decentralized DNS via Namecoin
Flutter app for censorship-resistant, human-readable nostr identities via Namecoin. Resolves names like alice.bit to nostr pubkeys stored on-chain, replacing NIP-05 which relies on censorable web servers. Supports NIP-17 encrypted DMs.
OAuth Bunker
Bridges OAuth providers (Google, GitHub, Microsoft, Apple) with nostr identity via NIP-46 remote signing. Split architecture keeps nsecs in an isolated LAN-only bunker. Admin panel protected by NIP-98 HTTP auth with scoped signing permissions.
Silent Payments via NIP-05
Send bitcoin to human-readable nostr identities instead of 118-char silent payment addresses. Resolves NIP-05 names to BIP 352 addresses via nostr profile lookup with Schnorr signature verification. Implemented as a resolver for Sparrow Wallet.
FriendPub
Secure key rotation for nostr using threshold cryptography and NIP-17 encrypted DMs. 2-of-3 guardian threshold signature scheme where at least two trusted guardians must approve a rotation. Publishes rotation proofs publicly for network verification.
CashuTube
Video streaming platform with Cashu ecash micropayments. Spilman payment channels for pay-per-view without accounts or subscriptions. HLS adaptive bitrate streaming with Cashu wallet integration.
SEC-07
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