A hierarchical deterministic (HD) wallet is a digital wallet commonly used to store the digital keys for holders of cryptocurrencies, e.g. Bitcoin, Ethereum, etc. Anyone with a copy of both the public and password-like private key can control the cryptocurrency in their account. This also refers to xPub, yPub and zPub. Through our HD Wallet endpoints customers can sync HD wallets, obtain HD wallet details, list HD wallet transactions, and more.