CINECA aims to support the federated queries and analyses of distributed cohorts across continents. A vital component of this work is building a machine readable catalogue of cohorts and sites that support the efforts of Work Package 1 discovery and analysis APIs, which can be programmatically queried so that API calls can be made to relevant sites and results gathered and presented to the researcher. Deliverable D1.1, Discovery Service Catalogue, supports the work of dependent work packages by implementing and demonstrating an open-source extended implementation of the Service Registry standard of the Global Alliance for Genomics and Health (GA4GH) for WP1’s discovery queries, the GA4GH Beacon queries. The Service Registry standard is now supported by the ELIXIR Beacon Network that CINECA WP1 uses to federate discovery queries across cohorts, and this demonstrator deliverable demonstrates the use of the service registry and its open source implementation.