0x (ZRX) is an infrastructure protocol that allows users to easily trade ERC20 tokens and other assets on the Ethereum blockchain without relying on centralized intermediaries like traditional cryptocurrency exchanges.

0x (ZRX) achieves this decentralized exchange functionality using a collection of open-source, publicly auditable smart contracts that work together to produce a flexible, low-friction trading protocol that developers can easily weave into their products.

Unlike many other Ethereum decentralized exchange protocols, 0x supports both fungible (ERC20) and non-fungible (ERC-723) tokens. This means it can be used for the permissionless trading of a wide range of assets, giving holders a way to buy, sell and exchange the vast majority of Ethereum assets through more than a dozen different apps.

The 0x protocol can be applied to a wide range of use cases, including eBay-style marketplaces for digital goods and services, OTC trading desks, exchange functionality for DeFi protocols and plain-old decentralized exchanges.

It has a circulating supply of 847,496,055 ZRX coins and a max. supply of 1,000,000,000 ZRX coins.

ZRX is currently available to trade on well over 200 different exchange platforms, but the most popular ones include Coinbase Pro, Binance, OKX, and Bybit.