> For the complete documentation index, see [llms.txt](https://whitepaper.mirrorworld.fun/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://whitepaper.mirrorworld.fun/matrix-core-engine/matrix-blockchain-adapter-hermes/hermes-indexer.md). # Hermés Indexer Blockchains today are still natively inefficient for reading specific account information. Given the linear strata of data, it makes it harder to query specific events natively without very efficient filters if we were to read directly from the chain. When reading accounts from the chain directly, there could be large volumes of data that are not necessary for the client to download. Downloading this would make it very slow and non-performant. The Hermés indexer solves this problem by doing this work by subscribing to relevant events for your game from the Matrix Core Engine Validator Node for the blockchain of your choice. It then parses this data and filters it for only relevant points we need to consume on the client. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## 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, and the optional `goal` query parameter: ``` GET https://whitepaper.mirrorworld.fun/matrix-core-engine/matrix-blockchain-adapter-hermes/hermes-indexer.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. 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.