NosFabrica offers an open‑source trust‑as‑a‑service API for the Nostr network that continuously processes follows, zaps, mutes and reports to generate real‑time reputation scores using algorithms such as PageRank, GrapeRank and verified‑follower counts. Developers can query these scores to filter spam, verify users and prioritize high‑quality content, enabling more reliable Nostr client and platform experiences.
Funding
Funding not disclosed
Founders
Product
Problem
In the decentralized Nostr network, users and developers struggle to differentiate trustworthy participants and high-quality content from spam and malicious actors because there is no built-in mechanism for evaluating reputation or trustworthiness.
Solution
NosFabrica provides open‑source trust engines that continuously analyze raw Nostr interactions—such as follows, zaps, mutes, and reports—to compute reliable trust scores. These scores, including metrics like PageRank, the proprietary GrapeRank, and verified‑follower counts, are exposed via a “trust‑as‑a‑service” API. Client applications can query the API to filter spam, verify authentic users, and surface content that aligns with a user’s or community’s trust preferences, enabling a cleaner and more useful experience across the network.
Target Audience
Primary customers are Nostr client developers and platform builders who need reliable reputation data to improve user experience, as well as community curators seeking tools to identify trustworthy participants and high‑quality content.
Features
- Real‑time processing of Nostr network events (follows, zaps, mutes, reports) to generate dynamic trust metrics
- Multiple scoring algorithms (PageRank, GrapeRank, verified‑follower counts) available for customizable trust evaluation
- Open‑source implementation allowing developers to audit, extend, or replace scoring logic
- Scalable API endpoint delivering per‑user and per‑content trust scores for integration into client apps
- Support for personalized trust calculations, enabling developers to apply custom weighting or filters
- Compatibility with any Nostr client or service, facilitating consistent trust signals across the ecosystem