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The Graph (GRT) is a decentralized protocol that aims to facilitate the indexing and querying of data from networks such as Ethereum and IPFS. It is designed to power various applications in the DeFi and broader Web3 ecosystem. The Graph allows anyone to build and publish open APIs, known as subgraphs, which applications can query using GraphQL to retrieve blockchain data. The Graph currently supports indexing data from Ethereum, IPFS, and POA, with plans to include more networks. The Graph Token (GRT) is used within the network to ensure the economic security and integrity of data being queried.

The Graph operates by indexing data based on subgraph descriptions, known as the subgraph manifest. This manifest defines the smart contracts of interest for a subgraph, the events in those contracts to pay attention to, and how to map event data to data that The Graph will store in its database. Once a subgraph manifest is written, it is stored in IPFS and the indexer begins indexing data for that subgraph. The Graph Node scans Ethereum for new blocks and the data for the subgraph they may contain. It finds Ethereum events for the subgraph in these blocks and runs the mapping handlers provided. The mapping is a WASM module that creates or updates the data entities that Graph Node stores in response to Ethereum events.

The Graph is designed to bring reliable decentralized public infrastructure to the mainstream market. It can be used by developers to build and publish open APIs, called subgraphs, that applications can query to retrieve blockchain data. This eliminates the need for third-party facilitators, making data retrieval more efficient and reliable. The Graph has been used by thousands of developers for DApps like Uniswap, Synthetix, Aragon, AAVE, Gnosis, Balancer, Livepeer, DAOstack, Decentraland, and many others. It also allows active Indexers, Curators, and Delegators to earn income from the network proportional to the amount of work they perform and their GRT stake.

The Graph was founded by Yaniv Tal (project lead), Brandon Ramirez (research lead), and Jannis Pohlmann (tech lead). The founders have engineering backgrounds and have worked together for 5-8 years. They previously co-founded a developer tools startup together and have spent a significant portion of their careers working to optimize the API stack. The Graph raised funds from community members, strategic VCs, and influential individuals in the blockchain community. As of November 2020, The Graph had raised approximately $25M. The Graph has a global community, including over 200 Indexer Nodes in the testnet and more than 2,000 Curators in the Curator Program as of October 2020.