INVAPI
High Accuracy 100% GDPR

Invoice Digitization. Conversion. Validation. All Formats.

The complete e-invoice API with high extraction accuracy, full GDPR compliance, and support for XRechnung, ZUGFeRD, UBL, and CII. No data stored. Ever.
Get Started FreeDocs
terminal
$ curl https://api.invapi.org/api/v1/file/json \
  -H "Authorization: Bearer $INVAPI_KEY" \
  -F file=@invoice.pdf

// → structured JSON
{ "invoice": { "seller": { "name": "ACME Corp" }, ... } }
Simple Integration

One API. Complete Workflow.

Digitize

Turn any document into structured data

  • PDF → JSON
  • Image → JSON
  • QR Code → Data

Convert

Transform between all e-invoice formats

  • JSON → UBL
  • JSON → CII
  • JSON → ZUGFeRD
  • JSON → Excel
  • UBL → JSON
  • CII → JSON
  • ZUGFeRD → JSON

Validate

Verify compliance with standards

  • UBL Validation
  • CII Validation
  • ZUGFeRD Validation
Only With invapi

Features No Other API Offers

Smart Auto-Categorization

Send your custom categories with the request and let AI automatically classify each invoice. Perfect for expense tracking, cost center allocation, and accounting workflows.

Smart Address Matching

Provide your known suppliers and customers, and the API automatically matches invoice parties to your existing database. Streamline your bookkeeping integration.

QR Code Extraction

QR codes on invoices contain structured payment data. We extract it and feed it into the AI context, significantly improving extraction accuracy for amounts, IBANs, and payment references. Supports Swiss QR, SEPA, RKSV, German TSE, Czech SPD, Slovenian UPN, Portuguese ATCUD, and more.

Validation Results in JSON

No more parsing XML error reports. Validation results come as structured JSON — ready to feed into your code, your UI, or your AI agent without any extra transformation.
Full Format Support

All German & EU E-Invoice Standards

XRechnung 3.0ZUGFeRD 2.xUBL 2.1CII
Why invapi

Built for E-Invoice Compliance

Germany's B2B e-invoicing requirement affects 6.4 million businesses. We built the complete solution developers actually need.

Complete Solution

Extraction + conversion + validation in one API. No need to integrate multiple vendors.

Bidirectional Conversion

Parse UBL, CII, and ZUGFeRD back to JSON. The only API that offers this.

High Accuracy

Enterprise-grade AI extraction that handles complex invoices, multi-page documents, and varied layouts.

Compliance Ready

Built specifically for German and Austrian e-invoice compliance. XRechnung 3.0.1 supported.

Frequently Asked Questions

Pricing

Simple, transparent pricing for API access
Free
For testing & MVPs
0 €
no credit card required/month
  • 10 data extractions/month
  • 100 validations/month
  • 100 conversions/month
  • PDF, image & receipt extraction
  • QR code extraction
  • XRechnung & ZUGFeRD conversion
  • Reverse conversion (UBL/CII → JSON)
  • Batch processing (100/call)
  • All API features
Starter
For indie developers
9.99 €
billed monthly/month
  • 100 data extractions/month
  • 1000 validations/month
  • 1000 conversions/month
  • Everything in Free
  • Email support (24h)
Pro
Popular
For small SaaS & agencies
29 €
billed monthly/month
  • 500 data extractions/month
  • 5000 validations/month
  • 5000 conversions/month
  • Everything in Starter
  • Priority support (12h)
Business
For mid-size companies
99 €
billed monthly/month
  • 5000 data extractions/month
  • 50000 validations/month
  • 50000 conversions/month
  • Everything in Professional
  • Priority support (4h)
  • 99.9% uptime SLA

Ready to Be Fully E-Invoice Compliant?

Join developers building compliant e-invoice solutions.

Start Building Free