# Doxnex — Document Intelligence API

> Generate, validate, and deliver compliant fiscal documents via API

## Features
- 4 document types: Invoice (380), Credit Note (381), Debit Note (383), Prepayment (386)
- Dual compliance: Factur-X BASIC (France/EU) + Peppol UBL BIS 3.0 (Oman/GCC)
- 8 languages including Arabic bilingual RTL
- Multi-currency: EUR, OMR, USD
- PDF/A-3 with embedded XML (CII or UBL)
- Sequential legal numbering
- Custom logo per tenant
- HMAC-signed webhooks
- Stripe billing (4 plans: Developer 39 EUR, Startup 99 EUR, Business 249 EUR, Scale 499 EUR)

## Compliance
- Factur-X BASIC: Validated by FNFE-MPE (Fully Valid YES)
- Peppol UBL BIS 3.0: Validated by peppolvalidator.com (All BIS 3.0 + EN16931 checks passed)
- EN 16931 European semantic standard
- NF525 SHA-256 hash chain

## Document Types
- Tax Invoice (InvoiceTypeCode 380)
- Credit Note (CreditNoteTypeCode 381) — with BillingReference to original invoice
- Debit Note (InvoiceTypeCode 383) — with BillingReference to original invoice
- Prepayment Invoice (InvoiceTypeCode 386)

## Supported Markets
- France: Factur-X BASIC/EN16931 for PA/PDP compliance (Sept 2026)
- Oman: Peppol UBL for Fawtara program (Aug 2026)
- Belgium, Netherlands, Singapore: Peppol UBL (already mandatory)
- Germany: ZUGFeRD (= Factur-X)

## API
- Base URL: https://api.doxnex.io
- Auth: X-Doxnex-Api-Key header
- Docs: https://docs.doxnex.io
- Sandbox: https://doxnex.io (interactive demo)

## Tech
- Java 21 / Spring Boot 3.3.6
- PostgreSQL 16 / Redis 7
- OpenHtmlToPdf (EU) + Chromium headless (Arabic RTL)
- 465+ tests, 0 failures