The document presents the specification of the repository, which will serve as a centralized hub for health technology assessment (HTA) methodologies and evidence, supporting DHT developers, policymakers, and HTA bodies in making evidence-based decisions while ensuring compliance with evolving regulatory frameworks. The repository will incorporate core functionalities such as document submission, classification, compliance verification, controlled access, analytics and training resources. It will meet requirements for security, scalability, interoperability, usability, and sustainability. This document details the repository’s design, technical specifications, and implementation roadmap to ensure it meets the evolving needs of stakeholders in the digital health ecosystem.