Zyntem
Zyntem (formerly FiscalAPI) is a REST API for submitting and managing fiscal transactions across European countries. It handles country-specific fiscalization requirements -- signing, submission, and compliance -- so you don't have to.
What is Zyntem?
Zyntem provides a unified interface for:
- Transaction submission -- Submit invoices for fiscalization; never blocks the cash register
- Account management -- Create accounts and manage API keys
- Location management -- Register merchant locations with country-specific fiscal configurations
- Certificate management -- Upload and manage PKCS#12 signing certificates
- Webhook notifications -- Receive real-time events for fiscalization outcomes
- Retry queue -- Automatic retry with exponential backoff for failed submissions
- Fiscalization compliance -- Automatic validation for 10 countries: Spain (TicketBAI, Verifactu, SII), Italy (FatturaPA / SDI, Documento Commerciale), France (NF525), Portugal (SAF-T PT, ATCUD), Hungary (NAV Online Számla), Slovenia (FURS), Croatia (Fiskalizacija), Romania (e-Factura), Poland (KSeF FA(2)), and Greece (myDATA)
Supported countries
| Country | Status | Systems |
|---|---|---|
| Croatia (HR) | Supported | Fiskalizacija CIS |
| France (FR) | Supported | NF525 |
| Greece (GR) | Supported | myDATA / AADE |
| Hungary (HU) | Supported | NAV Online Számla |
| Italy (IT) | Supported | FatturaPA / SDI, Documento Commerciale |
| Poland (PL) | Supported | KSeF FA(2) |
| Portugal (PT) | Supported | SAF-T PT, ATCUD |
| Romania (RO) | Supported | ANAF e-Factura |
| Slovenia (SI) | Supported | FURS davčne blagajne |
| Spain (ES) | Supported | TicketBAI, Verifactu, SII |
For sandbox onboarding instructions per country, see Sandbox Onboarding Overview.
Getting started
- Create an account to get your API key
- Create a location for your merchant
- Submit a transaction for fiscalization
- Configure country-specific settings as needed
Ready to start? Head to the Quickstart guide.