The purpose of the article is to examine and describe the operational principles and functional capabilities of modern services and tools designed to monitor, support and analyse dissemination of research outputs published open access, which can be utilized by librarians to promote open science practices. The research methodology is based on a combination of scientific methods, incorporating content analysis of official web pages of tools and services, as well as methods of synthesis, systemic analysis, structural-functional analysis, and information-analytical methods. Scientific novelty. This article reviews modern tools, services and instruments, namely OpenAlex, BISON, COKI Open Access Dashboard, Journal Tracker Tool, OPTIMETA Plugins and others to support open scientific communication. It can be argued that development of open, non-commercial and shared infrastructure has the potential to vastly improve open access implementation. Conclusions. This study identified a number of innovative tools for analyzing and monitoring open access that can be used by librarians, researchers, and all interested parties. These tools are important for expanding and democratizing access to knowledge, overcoming territorial, institutional and disciplinary barriers. Improving open, non-profit infrastructure should be a key task on the path to implementing open science practices. Consequently, it is important for modern librarians to master their skills in working with open tools to monitor, analyze, and support open scholarly communication practices, given the evident potential of online tools in scholarly communication and their ability to disseminate the results of scientific activity.
Keywords: open access, open access monitoring, scientific communication, digital tools, open science.