re3data is the global registry for research data repositories. As of October 2021, the service lists over 2700 digital repositories across all scientific disciplines and provides an extensive description of repositories based on a detailed metadata schema, the updated version of which was recently published. The service promotes open science practices and the visibility of science-driven open infrastructures. A variety of funders, publishers, and scientific organizations around the world refer to re3data within their guidelines and policies, recommending the service to researchers looking for appropriate repositories for storage and discovery of research data. The re3data web interface and API function as an important Science Gateway, allowing its end users and other services to access the largest index of research data repositories in the world. Since January 2020, the re3data COREF project receives funding from the German Research Foundation (DFG) to further develop and enhance the registry service. This presentation from the Gateways 2021 conference introduces the re3data service and gives an overview of the ongoing project work, including a short introduction to the recently published ���Conceptual Model for User Stories��� for re3data. The editorial process for the inclusion of repositories in re3data is explained and readers learn how to submit new entries and suggest changes. Readers also learn how to retrieve information and metadata from re3data. A recording of the session will be uploaded on Youtube.