# Overview Welcome to the Holder API documentation! This is a work in progress, and we'll have a lot more coming soon. For now you should be able to find some general authentication and security docs, as well as a few simple APIs to get started modifying contacts in the system. Pretty much all of our APIs use `Content-Type: application/json`, so be sure to `JSON.stringify()` your request body (or language/tool specific method if not using JavaScript). --- # 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.holder.xyz/holder-api/readme.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.