The Energetic Solar Eruptions: Data and Analysis Tools (SOLER) European project investigates the most energetic phenomena occurring at the Sun and provides new knowledge on their interrelations, variability, and energy partitioning. Using the newly expanded unprecedented heliospheric spacecraft fleet, we investigate energetic solar eruptions starting from three perspectives: fast coronal mass ejections (CMEs), strong X-ray flares, and large solar energetic particle (SEP) events. Key parameters of the various eruption phenomena will be determined, and their interrelations examined to make significant leaps in our understanding on how the eruptive phenomena are linked to each other, how they interact with each other, and how they result in acceleration and release of high energy particles from the solar corona into interplanetary (IP) space. SOLER started in January 2024. Since then, the different teams have developed efficient tools to analyze the large variety of measurements coming from spacecraft or ground-based instruments. The user workshop will be the occasion for everyone to learn about these tools and to discuss about the still necessary developments.