Open Protocol
Circular Economy
Infrastructure for Cities
A federated protocol enabling cities to track, exchange, and settle material flows while maintaining local sovereignty.
4Core Schemas
v0.1Protocol Version
Lab Demo
A federated protocol enabling cities to track, exchange, and settle material flows while maintaining local sovereignty.
Local Optimization with Overflow Protocol — An open, federated standard for tracking material flows between cities. LOOP enables municipalities to share surplus resources, coordinate circular economy initiatives, and maintain sovereignty over local data while participating in regional material exchanges.
A unique digital identity for physical materials. MaterialDNA captures a material's composition, origin, quality metrics, and chain of custody — enabling trusted exchanges and full lifecycle tracking from source to reuse. Think of it as a passport for materials in the circular economy.
Full specification, schemas, and security requirements.
Learn moreJSON-LD contexts, JSON Schemas, and example payloads.
Learn moreSee LOOP in action with city-specific implementations.
Learn moreRFC process, decision-making, and community proposals.
Learn moreWhether you're a city, operator, or developer, there's a place for you in the LOOP ecosystem.