Nostr WoT — Web of Trust Ecosystem
Full infrastructure for decentralized trust scoring on Nostr. A three-part open-source ecosystem: a Rust-based graph oracle, a browser extension exposing window.nostr.wot, and a JavaScript SDK — used to filter spam without central moderators.
Technologies
Nostr WoT is the foundational trust layer for the Nostr ecosystem. It answers one question: how many hops separate two Nostr users? That answer powers spam filtering, content ranking, and reputation scoring across any Nostr client — without relying on a central authority.
The ecosystem has three parts. The WoT Oracle is a Rust-based high-performance graph indexer that continuously syncs follow lists from Nostr relays and runs bidirectional BFS pathfinding. It delivers sub-millisecond queries at over 10,000 requests per second, is self-hostable via Docker, and has a public instance at wot-oracle.mappingbitcoin.com.
The browser extension is available on Chrome, Brave, Edge, Opera, and Firefox. It exposes window.nostr.wot — a standard API any web app can query for trust scores. It supports three privacy modes: Local (full privacy, IndexedDB, no external requests), Remote (queries the Oracle), and Hybrid. Users can configure custom trust thresholds, path bonuses, and mute lists.
The JavaScript SDK (nostr-wot-sdk on npm) is extension-first: it uses the extension when available and falls back to the Oracle. It ships full TypeScript support and React hooks. Trust scores follow the formula: score = baseScore × distanceWeight × (1 + pathBonus), with weights decreasing by hop count and bonuses for multiple trust paths.
The ecosystem powers MappingBitcoin's review trust scoring and Nostr WTF's feed filtering. MIT licensed, built for maximum adoption.
Related Projects
Nostr WTF — Full Nostr Client
A full-featured Nostr client with Web of Trust feed filtering. Uses WoT trust scores to surface content from trusted circles and suppress noise — a social graph-aware feed instead of a raw global firehose.
Nostr WoT Playground Feed Client
A global Nostr feed client that integrates the Web of Trust SDK to display trust scores, social distance, and reputation data alongside events from the entire network — not just followed accounts.