# Basics - [Getting started](https://dev.ropo.com/guides/basics/getting-started.md) - [Authentication](https://dev.ropo.com/guides/basics/authentication.md) - [Data transfer limits and ZIP uploads](https://dev.ropo.com/guides/basics/data-transfer-limits-and-zip-uploads.md) - [Invoice](https://dev.ropo.com/guides/basics/invoice.md) - [Prices on the invoice row](https://dev.ropo.com/guides/basics/invoice/prices-on-the-invoice-row.md) - [EU semantic invoices and validations](https://dev.ropo.com/guides/basics/invoice/eu-semantic-invoices-and-validations.md) - [Attachments](https://dev.ropo.com/guides/basics/invoice/attachments.md) - [Cash discount](https://dev.ropo.com/guides/basics/invoice/cash-discount.md) - [Payment plans](https://dev.ropo.com/guides/basics/invoice/payment-plans.md) - [Financing and invoice purchase](https://dev.ropo.com/guides/basics/invoice/financing-and-invoice-purchase.md) - [Fixed fee (Late Payment Directive)](https://dev.ropo.com/guides/basics/invoice/fixed-fee-late-payment-directive.md) - [Construction site information](https://dev.ropo.com/guides/basics/invoice/construction-site-information.md) - [Print service (own account and reference)](https://dev.ropo.com/guides/basics/invoice/print-service-own-account-and-reference.md) - [Examples of invoice accountings](https://dev.ropo.com/guides/basics/invoice/examples-of-invoice-accountings.md): Examples of how to use accountdate and accountrow for accounting exports. - [Reminder](https://dev.ropo.com/guides/basics/reminder.md) - [Debt Collection](https://dev.ropo.com/guides/basics/debt-collection.md) - [Credit note allocation](https://dev.ropo.com/guides/basics/credit-note-allocation.md) - [Payment](https://dev.ropo.com/guides/basics/payment.md) - [Other documents](https://dev.ropo.com/guides/basics/other-documents.md): Send PDF letters to Ropo using a JSON index file. --- # 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://dev.ropo.com/guides/basics.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.