The Research Data Working Group of the Digital Scientific Library (BSN10) launched in 2015 an inventory of French research data management services, which will be referenced in the future online catalog Cat OPIDoR. This initiative echoes the national and international political context, in which governments and funding agencies gradually implement open science policy frameworks, whereas research activities are also altered by the ubiquity of data and the computing capacities to generate, mine and distribute them. It aims to help research teams to identify services most able to provide them appropriate data management support and to inform political stakeholders about where resources investment is needed.