SubQuery

SubQuery is a blockchain developer toolkit for Web3 infrastructure. Operating between layer-1 blockchains and decentralized apps (dApp), the toolkit is an open-source indexer that organizes and serves Web3 data over GraphQL. The data-as-a-service provider aggregates and organizes data from Polkadot, Substrate, Avalanche, Algorand, and Cosmos projects, offering data for developers to utilize for different projects.

This is achieved by four tools offered to the developers: the SDK, SubQuery Projects, SubQuery Explorer, and the upcoming SubQuery Network. Through the platform's involvement in the Web3 Grants Program, the SubQuery team created the open-source Software Development Kit (SDK). The SDK enables users to generate their own SubQuery Project and defines how the Indexer should traverse and aggregate their protocol.

SubQuery Projects is an online managed service where users can publish their SubQuery Projects for public or private consumption. They are hosted on SubQuery’s hosting service. On the other hand, SubQuery Explorer is an online managed service that provides access to published, SubQuery Projects that are made by contributors in the community. Users can test queries in their browsers using the playground, or get GraphQL API endpoints for each project.