There is growing academic attention to both parliamentary diplomacy and to parliamentary digital communication in recent years. Yet, the study of Greek parliamentary diplomacy remains an under-researched topic. The paper brings together these two dimensions by considering the following case study: the Hellenic Parliament ́s reactions to the November 2019 Turkey-Libya (internationally recognized government) Memorandum of Understanding on maritime boundaries in the Mediterranean Sea. To do so, this study will address the following key research question: has the Hellenic Parliament as an institution adopted new technologies and data openness to promote its parliamentary diplomacy? There is new literature widely expecting that parliaments do so, but, to date, there is little empirical evidence to that effect. This paper attempts to close this gap by investigating which digital tools were utilized in an effort to defend and promote Greece ́s stance on that issue between November 2019 and March 2020.