Overview
An indexer is a service that organizes blockchain data for fast queries, powering dapps and analytics. It extracts, processes, and stores on-chain data. The Graph is a leading decentralized indexer.
How It Works
Indexers parse blocks and contract events, transform the data, and serve it through query APIs. Applications use indexed data instead of scanning blocks themselves. This makes development faster and cheaper.
Why It Matters
Indexers are essential infrastructure for dapps, analytics, and search. They turn raw blockchain data into usable information. Decentralized indexing adds resilience and incentive alignment.
Related Concepts
Indexers relate to Subgraphs, The Graph, and Data Availability. They power Blockchain Analytics and dapps.