Unicorn published the Open API specification and supporting guidance for the Regional Nomination Platform (RNP) v2 on the IFA1 project website in May 2025. The deliverable provided machine-readable API documentation and downloadable guidance materials to market participants to support nomination, pre-nomination and related market messaging workflows for IFA/IFA2 access. The publication was made available via the IFA1 resources page to enable integration with the interconnector’s market systems and to assist third parties and trading participants in implementing interoperable software for nominations and related operational data exchange.