# Authentication Oxygen uses API keys for authentication. Visit our [**discord server**](https://oxyapi.uk/discord) to retrieve the API key you'll use in your requests. **Remember that your API key is a secret !** Do not share it with others or expose it in any client-side code (browsers, apps). Production requests must be routed through your own backend server where your API key can be securely loaded from an environment variable or key management service. All API requests should include your API key in an `Authorization` HTTP header as follows : ```url Authorization: Bearer OXYGEN_API_KEY ``` --- # 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.oxyapi.uk/authentication.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.