OKB is the native utility and gas token of the OKX ecosystem, serving as both an exchange loyalty asset and the primary economic unit for X Layer, OKX's Ethereum-compatible Layer 2 network. Originally launched as an ERC-20 token on Ethereum in March 2018, OKB has evolved from a simple fee-discount token into a multi-layered infrastructure asset spanning centralized exchange utility, Layer 2 transaction settlement, and protocol-level governance and staking.