Loopring Subgraph is an open-source tool that indexes on-chain data from Loopring's zkRollups. Developed by Loopring, the subgraph allows developers to parse zkRollup blocks dynamically without manual indexing.  With Loopring Subgraph, developers can query real-time and historical data such as transactions, accounts, balances, and more using a rich API built on GraphQL and The Graph Protocol. The Loopring Subgraph powers key Loopring block explorers.