API for the issuance and receipt of electronic invoices according to the Spanish regulations

Maximize efficiency

Adapt your system to the Spanish electronic invoicing regulations

Speed up the issuance and receipt of invoices both with the Spanish Public Administrations and your customers from Spain by adapting your system to the Spanish electronic invoicing.

Be prepared for the regulatory changes and implement the Spanish electronic invoicing in your system without complex migrations or multiple portals.

make it easy

How does our API help you?


You don’t need to change your software or use different portals to start billing electronically according to the Spanish regulations. Save time and effort by adapting your system to them. You can integrate our API whatever your management system is.


Reduce management time to the minimum by generating your invoices in Facturae format signed electronically and sending them to the reception portals of the Spanish Public Administrations and customers from your system.

Sustainability and savings

Eliminate the paper, printing, sending and storage costs coming from traditional invoices while improving the environmental impact of your company by promoting a paperless invoicing process.

Quality guaranteed

We are certified providers of electronic invoicing services by the General State Administration portal FACe because we comply with all the requirements and technical specifications demanded by de Spanish government.

IQ eSign Facturae API

the multi-erp API for issuing and receiving invoices according to the spanish regulations

  • Generate digitally signed invoices in XML format.
  • Send them to the reception portals of the corresponding Public Administrations, such as FACe (state), FACeB2B (B2B relations), e-FACT (Catalonia), Ticket BAI/Batuz (Basque Country) and Osakidetza (Basque health service).
  • Have traceability on the invoices’ status (registered, rejected or paid)
  • Safeguard and store your electronic invoices.
  • Perform the entire billing process from your own software, without migrations or multiple portals.

we adapt to you


Issuance and receipt of electronic invoices

Our API allows you to generate your invoices according to the format established by the FACe, e-FACT and Osakidetza portals. Whatever your ERP or management system, our API adapts to your needs.

Basque country: Ticket BAI & Batuz

We are TicketBAI guarantor software, so if you need to adapt your system to the Basque regulations, our API allows you to generate your invoices according to TicketBAI requirements and send them to the Provincial Treasury.

Microsoft Dynamics Connector

We have a specific connector for Microsoft Dynamics environments, with which you can carry out the entire process of issuing and receiving invoices with the Spanish Administrations and customers without leaving your ERP.

start now

Would you like to connect your management system or ERP with our electronic invoice API?

Do you want more information?

If you have questions or need more information about IQ eSign Facturae API, contact us, we are at your disposal to help you!

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