API for Automated Invoice Processing – PDF to XML & JSON FastAPI

🔌 API for Automated Invoice Processing

With our powerful FastAPI REST interface, you can process incoming PDF invoices automatically into structured JSON and XML output – fully compliant with DIN EN 16931 (ZUGFeRD/XRechnung). Ideal for developers, integrators, ERP, DMS, web platforms and online shops.

✅ Your Benefits with the Invoice Extractor API

• Structured output: JSON + XML (ZUGFeRD-compliant)
• Secure token authentication via HTTP Header
• 100% server-side processing in Germany
• RESTful API based on FastAPI – modern & documented
• Ideal for mailroom, ERP/DMS platforms & web integrations

🖼️ Also works with scanned & image-based PDF invoices (OCR)

Our API handles not only digital PDFs but also scanned or image-based documents (from MFPs, OCR scans, email attachments). Integrated Tesseract OCR reliably detects key data like recipient, IBAN, VAT ID, line items and totals.

• ✔ Automatic OCR for image-PDFs
• ✔ Perfect for scanned invoices & incoming mail
• ✔ OCR activates only when needed (hybrid mode)

🌍 Supported languages (automatic detection)

The API detects and processes invoices in six languages automatically – no setup required:

• 🇩🇪 German
• 🇬🇧 English
• 🇵🇱 Polish
• 🇫🇷 French
• 🇮🇹 Italian
• 🇪🇸 Spanish

Ideal for international workflows, platforms and suppliers.

🚀 CURL example: send PDF to the API

curl -X POST https://generator.7-pdf.de/extract-invoice/ \
-H "accept: application/json" \
-H "Authorization: Bearer [[ T O K E N - C O D E ]]" \
-H "Content-Type: multipart/form-data" \
-F "file=@/Users/username/Documents/Invoice.pdf"

Response example (JSON excerpt):

{
  "success": true,
  "invoice_number": "2825056",
  "xml": "<?xml version="1.0" ?>\n<rsm:CrossIndustryInvoice ...",
  "validation_file": "passed",
  "validation_string": "passed"
}

💻 PowerShell Examples for Windows

Automate your PDF invoice processing with our free PowerShell scripts!

📄 PowerShell: Convert PDF to ZUGFeRD XML

Use our full PowerShell example in the documentation to extract structured XML using curl.exe and save it locally.

📁 PowerShell: Convert full folders to ZUGFeRD PDF

Batch-convert entire folders locally using our enhanced PowerShell script with 7-PDF Printer + Attach Tool. Includes PDF/A-3 conversion and automatic ZUGFeRD attachment. Go to 👉 example script: convert-pdfs-to-pdf-zugferd.ps1

⚙️ Looking for PDF to ZUGFeRD batch processing? You're covered!

• 📂 Convert entire folders automatically
• 📎 Attach XML via 7-PDF Attach Extract and Remove
• 🖨 PDF/A-3 conversion via 7-PDF Printer included

🔐 Access available in Pro, Team & Enterprise Plans

The API is available exclusively for licensed users. You can get started immediately by purchasing a valid API token.

📥 Get API Access Now

Activate API Access

📥 Try the software now – Automated processing of PDF invoices into PDF ZUGFeRD format!

Start today with the 7-PDF Attach Extract and Remove Software and process your PDF invoices into standards-compliant e-invoices – free trial, with numerous automation features and professional options.