This document introduces the Userfeeds Protocol, an open protocol for establishing information relevance in crypto-economic networks. It discusses the problems with how information relevance is currently solved by centralized platforms and proposes using a decentralized protocol and blockchain to aggregate evaluations across contexts to extract both vertical and horizontal relevance. This would allow tokenization of relevance domains and open up new opportunities for consensus-based and personalized relevance. The current implementation includes a Userfeeds Relevance Platform built on Ethereum with ranking algorithms and interfaces. Several potential use cases are described, including a Link Exchange platform to monetize token-based communities and applications.