# Configuring APIs **An Open API (often referred to as a public API)** is a publicly available application programming interface that provides developers with programmatic access to a proprietary software application. APIs are sets of requirements that govern how one application can communicate with and interact with another. More details on this can be found on our Developer's portal --- # 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://support.emsigner.com/administrator-settings/configuring-apis.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.