# Fundamentals - [Buying](https://docs.xrpns.com/fundamentals/buying.md): Instructions on buying a domain - [Updating records](https://docs.xrpns.com/fundamentals/updating-records.md): Here's a step-by-step guide to update text records for your .xrp domain! - [Using affiliate links](https://docs.xrpns.com/fundamentals/using-affiliate-links.md): To express our gratitude and provide an opportunity for our members to earn rewards, we have designed an affiliate program that allows you to generate $XRP by sharing the benefits of XNS with others. - [Setting up primary address](https://docs.xrpns.com/fundamentals/setting-up-primary-address.md) - [Extending duration](https://docs.xrpns.com/fundamentals/extending-duration.md) - [How to transfer](https://docs.xrpns.com/fundamentals/how-to-transfer.md) --- # 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.xrpns.com/fundamentals.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.