This API provides indirect access to the Zap Ethereum to the corresponding SDK (see below). It provides a way to register accounts, set bond market parameters and expose tokenized services to offchain subscribers and onchain user-contracts. The API allows developers to register data-providers on the Zap backend to serve both queries and subscription requests. The Zap platform serves as a data broker that enables providers to publish secure data feeds from a variety of endpoints that are monetized. Zap.org is a Smart Contract Oracle Marketplace that powers decentralized applications.