ZRX is a peer-to-peer tokens exchange. Using the protocol, DApps have access to public liquidity pools, or instead, can create new liquidity pools. Developers use 0x as a platform to run exchange apps that interact with 0x.js JavaScript library. For end-users, 0x is the infrastructure of a broad range of client-facing apps, for example 0x Portal — a dApp that enables trustless Ethereum-based token trading between recognized counterparts.