Factur-X & ZUGFeRD 2.3 EN 16931 E-Invoice Engine — Python SDK

Sub-5ms Factur-X, ZUGFeRD 2.x and XRechnung e-invoice validation and parsing from PDF/A-3 hybrid files or UN/CEFACT CII XML.

Official, zero-dependency Python 3.8+ client library for Factur-X & ZUGFeRD 2.3 EN 16931 E-Invoice Engine, built on the Stanza Micro-API Network. Intended for enterprise data pipelines, backend verification, and sub-5ms edge compute.

• 🌐 Live Web Playground: Test your inputs online
• 📚 API Documentation: View full schema on Stanza
• ⚡ Platform Overview: Explore the Stanza Developer Network

📦 Installation

pip install stanzaapi-factur-x-validator

🚀 Quickstart

import os
from stanzaapi_factur_x_validator import FacturXValidatorClient

# Initialize client (api_key optional for local evaluation)
client = FacturXValidatorClient(
    api_key=os.getenv("STANZA_API_KEY")
)

# Execute deterministic validation
response = client.validate("<CrossIndustryInvoice xmlns=\"urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100\">...</CrossIndustryInvoice>")

if response.get("success"):
    print("Verification Success:", response["data"])
else:
    print("Validation Error:", response.get("error"), response.get("code"))

📄 Example Response

{
  "success": true,
  "data": {
    "valid": true,
    "profile": "EN16931",
    "invoice_number": "FX-2026-0001"
  }
}

⚙️ Client Options

🔗 Useful Links

• Factur-X & ZUGFeRD 2.3 EN 16931 E-Invoice Engine Interactive Sandbox
• Stanza Developer Directory
• Source Code & Issue Tracker

📄 License

MIT © Stanza — Powered by Stanza.