> For the complete documentation index, see [llms.txt](https://hub.bsvblockchain.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hub.bsvblockchain.org/higher-learning/bsv-academy/bsv-network-topology/essentials-of-overlay-services/introduction-to-overlay-services.md). # Introduction to Overlay Services {% embed url="" %} **Overlay Services** represent a transformative approach in the realm of computer networking, particularly within the context of blockchain technology. An overlay, in this sense, refers to a **virtual network** that is constructed atop an existing physical network, thereby augmenting or extending the underlying infrastructure. In the case of the **BSV Blockchain (BSV) Node Network**, overlay services provide **specialized functionalities such as transaction lookups, token management, data storage, and the implementation of custom business logic**. The essence of overlay services lies in their ability to facilitate the storage of business data in a **flexible** and **scalable** environment, while the blockchain itself ensures the integrity of that data. Rather than necessitating the direct storage of all information on the blockchain, overlay services **allow businesses to maintain their data within specialized service layers**. The blockchain, in turn, provides **cryptographic proofs** and **timestamped records** that attest to the existence and integrity of the data. --- # 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://hub.bsvblockchain.org/higher-learning/bsv-academy/bsv-network-topology/essentials-of-overlay-services/introduction-to-overlay-services.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.