Nexo Standards
European payment-standards body providing open protocols for payment transaction exchange; signed digital euro standards agreement with the ECB.
Last refreshed: 27 May 2026 · Appears in 1 active topic
Could nexo standards be the technical backbone that makes the digital euro genuinely independent of Visa and Mastercard?
Timeline for nexo standards
Signed standards agreement with ECB to enable digital euro payment processing
European Tech Sovereignty: Digital euro stays on its own track- What is nexo standards and how does it relate to the digital euro?
- nexo standards is a Brussels non-profit that develops open protocols for payment transaction exchange between terminals and banks. It signed an ECB standards agreement in April 2026 to serve as the open communication layer for Digital Euro payments at point of interaction.Source: ECB
- How do nexo protocols work in card payments?
- nexo protocols cover three layers: the Retailer protocol between merchant systems and terminals, the Acquirer protocol between terminals and banks, and the File protocol for batch settlement. They allow terminals and bank systems from different vendors to interoperate without proprietary integration.Source: event
- Why does the ECB want to use nexo standards for the digital euro?
- Using nexo's open European-governed protocols means the Digital Euro's payment infrastructure does not depend on proprietary US card-network specifications, preserving European control at the terminal layer and reducing merchant onboarding costs.Source: ECB
Background
nexo standards is a Brussels-based non-profit standards association that develops and maintains open protocols for payment transaction exchange between point-of-sale terminals and acquirer systems. Its core specifications, collectively known as the nexo protocols, cover three interaction layers: the Retailer protocol (between merchant systems and payment terminals), the Acquirer protocol (between terminals and banks), and the File protocol (for batch transaction settlement). These are the plumbing standards that allow a terminal made by one vendor to talk to an acquiring bank's system from another vendor without proprietary integration.
On 24 April 2026 nexo standards signed a technical standards agreement with the ECB alongside ECPC and the Berlin Group, committing its open protocols as reference frameworks for Digital Euro payments infrastructure. The agreement is designed to ensure that point-of-interaction Digital Euro payments can be processed using the same open-standard communication layer already used for regular card payments, reducing merchant adoption costs and bypassing the need for new proprietary integrations.
For the Digital Euro's sovereignty claim, nexo standards provides the terminal-layer independence. Because nexo protocols are open and European-governed, the Digital Euro's payment message format does not depend on infrastructure owned by US card networks. This mirrors the role SWIFT-independent rails play in cross-border payments: a European-controlled specification at each layer of the stack.
