# Account - [Billing](https://support.whapi.cloud/help-desk/account/billing.md): Paying for the WhatsApp API and Managing your Subscriptions - [Add Business Info to Invoice](https://support.whapi.cloud/help-desk/account/add-business-info-to-invoice.md): How to Set Up Business Information for Invoicing - [Setting "Auto Download"](https://support.whapi.cloud/help-desk/account/setting-auto-download.md): What is Auto Download and how does it work? How to Get a Full-Size Picture in the Response? - [Customizable Webhook Headers](https://support.whapi.cloud/help-desk/account/customizable-webhook-headers.md): Custom callback headers. Now you will be able to add any custom header and token to increase security - [How to find out the IP channel](https://support.whapi.cloud/help-desk/account/how-to-find-out-the-ip-channel.md): How to get the IP of your Whapi channel - [How to Delete a Channel](https://support.whapi.cloud/help-desk/account/how-to-delete-a-channel.md): A Whapi Channel (instance) is a connection with a phone number that has a WhatsApp account, which will be responsible for sending and receiving messages --- # 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.whapi.cloud/help-desk/account.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.