InvoiceXML

InvoiceXML is an API that handles the complex world of electronic invoicing compliance. It lets developers and businesses generate, check, and convert invoices to meet specific regional standards like Peppol BIS for Europe, XRechnung for Germany, and Factur-X for France. Instead of building and maintaining this logic yourself, you send data to the API and get back a validated, compliant invoice in the required format, ready for submission.

The tool works by using the official validation rules (like Schematron and XSD) published by regulatory bodies such as KoSIT and OpenPeppol. A key feature is that InvoiceXML automatically updates these rule sets on their legal effective dates, so your integration doesn't break when regulations change. It also offers a suite of specific tools: you can create invoices from scratch, validate existing ones, convert between formats, extract data from PDFs, and even use AI-powered tools to turn messy PDFs into structured e-invoices.

This is most useful for developers at companies that issue invoices across different European countries, finance teams automating accounts payable/receivable, and businesses integrating e-invoicing into their ERP or checkout systems. It removes the need to become an expert in each country's evolving e-invoicing specifications, which can save significant engineering time and reduce the risk of non-compliant, rejected invoices.