Apibara

Apibara is a developer platform for on-chain data indexing that began with Starknet and now covers EVM chains and the beacon chain. Applications pull block and event streams straight from a node, transform raw data into domain objects inside an indexer script, then write to a database or push to downstream services, which removes the need to build a data pipeline. Its users are engineering teams wiring chain state into their own systems.

The core is a streaming protocol called DNA. A client opens a request over remote procedure calls, stating the starting cursor, the finality level required and a filter, and the node pushes only matching data. Rollback notices are part of the design: when a chain reorganises, the server sends an invalidation message and the indexer rolls back its local state. Compared with polling an interface and cleaning the output in a big data pipeline, direct node access removes intermediate steps and lowers both latency and bandwidth. Scripts are written in TypeScript, plugins handle persistence across several databases, and an indexer runs locally or hosted in the cloud from the same script.