Codex

SubQuery is an open indexing SDK paired with a decentralized network of RPC and indexer operators. Builders define an indexer with it and serve the results as an API.

The Graph is a decentralized indexing protocol where builders deploy subgraphs and query them over GraphQL. Builders use it to turn contract events into a queryable API without running their own indexer.

ethereum-etl is a Python tool that exports Ethereum data into files and data warehouses. Data builders run it to move blocks, transactions, and logs into their own analytics storage.

Ponder 是一个用于加密货币应用程序的索引框架，当你向产品后端或前端提供新鲜的链上数据时，它强调快速刷新和开发者人体工程学。

Subsquid, also called SQD, is a modular batch indexing SDK backed by distributed data archives. Builders use it to write custom indexers that read from archives instead of pulling every block from an RPC node.

TrueBlocks, used through its chifra command, builds a local address-based index on top of an Ethereum node. Builders run it to index and query the full activity of an address from their own machine.