Create a CII Invoice
Fill in the details below and download a validated UN/CEFACT CII D16B invoice. EN 16931 compliant and ready for ZUGFeRD, Factur-X, or standalone XML delivery.
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API REST
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Plateformes no-code
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Beyond the Form: Automate Your CII Invoice Workflow
This form is perfect for one-off invoices. But if you generate dozens or hundreds of CII documents — for ZUGFeRD embedding, ERP integration, or e-invoicing network delivery — InvoiceXML gives you the tools to automate the full pipeline with a single API call or no-code trigger.
1. Developer-First REST API
Integrate CII generation directly into your ERP, accounting software, or custom application with a single HTTP call:
- • Single Endpoint: POST your invoice fields as JSON and receive a validated UN/CEFACT CII D16B XML back instantly — ready for standalone delivery or PDF/A-3 embedding.
- • Stateless & Secure: We process your data in memory and return the XML. No financial data is stored or logged.
- • Full Compliance: Every generated CII document is validated against EN 16931 Schematron business rules before delivery — the same rules ZUGFeRD and Factur-X validators enforce.
- • ZUGFeRD & Factur-X Ready: The output CII XML is structurally identical to the XML embedded in ZUGFeRD 2.x and Factur-X documents — attach it to a PDF/A-3 in your own pipeline or use our /create/zugferd and /create/facturx endpoints to get the full hybrid PDF in one step.
Pro Tip: Check out our API Documentation to see the full request schema and response format.
2. Email Gateway — Send JSON, Receive CII XML
The InvoiceXML Email Gateway requires zero API integration — any system that can send email can trigger CII generation:
- • How it works: Email a JSON attachment containing your invoice data to your dedicated InvoiceXML gateway address. We generate the validated CII XML and email it back — ready for delivery or ZUGFeRD embedding.
- • Legacy ERP Friendly: Any system with outbound email capability can trigger CII generation — no webhook setup, no API keys in your code, no infrastructure changes.
- • Batch Support: Send multiple invoice objects in a single JSON array and receive all corresponding CII XML files in return.
3. No-Code Automation (Zapier, Make.com & n8n)
Connect InvoiceXML to the tools your team already uses — no developer required:
- • ERP & Accounting: Trigger CII generation automatically whenever a new invoice is created or approved in your system — no manual export step.
- • Google Sheets / Airtable: Turn a row of invoice data into a validated CII XML and forward it to your document management system or e-invoicing network automatically.
- • ZUGFeRD Pipeline: Chain CII generation with a PDF/A-3 embedding step in Make.com or n8n to fully automate ZUGFeRD hybrid invoice production without writing a line of code.
Why UN/CEFACT CII Is the XML Backbone of European E-Invoicing
UN/CEFACT CII (Cross Industry Invoice) D16B is one of the two official XML syntaxes of the European EN 16931 e-invoicing standard. It is the format embedded inside every ZUGFeRD and Factur-X document — making it the most widely deployed structured invoice format in Germany and France. Beyond hybrid PDFs, CII is used as a standalone XML exchange format by ERP systems, accounting platforms, and e-invoicing networks across the EU and internationally.
Frequently Asked Questions
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