Documents

Whitepaper v1.2 (Published)

Architecture, governance, scope, and implementation roadmap

Includes:

European retail payment context and A2A opportunity

Problem analysis (fragmentation, merchant acceptance costs, interoperability gaps)

Alignment with EU instant payments strategy and SCT Inst

High-level architecture (payment payload model, Merchant Registry, conceptual flows)

Governance model (MTÜ stewardship, Technical Operator separation)

Implementation roadmap

Risk considerations and mitigations

Technical Specification v0.1 (Draft, Non-normative)

QR model, Registry, PSP rules

Draft v0.1 is non-normative. v1.0 is normative.

Includes:

Payment payload specification (QR carrier profile in v0.1)

Merchant Registry data model

Registry lookup and validation interface (resolver)

Error handling and response codes

Static vs dynamic merchant-presented flow rules

Conformance requirements and certification principles

Risk considerations and mitigations

Communications

Public updates, published specifications, and governance materials are made available through this site and associated public repositories.

Contact details are provided for administrative and governance-related matters.

Administrative and governance contact

Contact