# Indexers ## Overview Blockchain indexers are specialized tools or services that extract, process, and organize data from blockchain networks, transforming it into formats that are easily queryable and accessible for developers and applications. Given that blockchain data is inherently decentralized and stored in a sequential manner, retrieving specific information can be challenging. Indexers address this by creating structured databases or APIs, enabling efficient data retrieval and analysis. ## Indexers ### The Graph The Graph is a decentralized indexing protocol that allows developers to build and publish open APIs, known as subgraphs, which applications can query using GraphQL. Indexers in The Graph Network operate nodes that index these subgraphs and serve queries, earning rewards for their services. #### Supported Networks | Network | ID | Documentation | | --------------------- | ----------------- | --------------------------------------------------- | | Gravity Alpha Mainnet | `gravity-mainnet` | [View Documentation](https://thegraph.com/docs/en/) | --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.gravity.xyz/ecosystem-infrastructures/the-graph.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.