SQD is a decentralized data lake and query engine designed to offer developers performant and permissionless access to data, aiming to build a neutral and open internet rooted in Web3 principles. Secured by ZK proofs, the SQD network boasts a modular architecture that enables exceptional scalability and developer convenience optimized for blockchain indexing, dApp development and dcs.SQD is a response to unscalable and rigid monolithic indexing frameworks that had previously gained popularity and market traction among Web3 developers. Today, these frameworks are struggling to adapt in a rapidly evolving blockchain environment. Additionally, the network serves as a highly efficient and decentralized alternative to centralized infrastructure firms, including large RPC and API providers.