In the wake of works that propose to analyze the contextual specificities that circulate the processes related to the national curriculum policy in implementation, the Common National Curriculum Base (BNCC), this paper seeks to contribute to the field, in order to analyze the implementation of the BNCC in the light of the theoretical framework focused on the concept of state capabilities, given thescarcity of studies that articulate such concepts in the context of investigations on the current curriculum policy and municipal performance in this process. Understanding who coordinates and how the coordination of the Base implementation takes place in the context of an increasingly heterarchical State involves understanding the performance and interaction of the actors and institutions involved. This aspect is of great social and scientific relevance, since itinvolves the constitution of the social project of a group of ideologies and specific interests, from a theoretical point of view still little explored. Thus, this research aims to investigate the performance of Undime and two municipal secretaries of education in the implementation of the BNCC, focusing on the mapping of state capabilities and sub-capabilities mobilized by the municipal secretaries that implement the BNCC in their respective territories and by Undime, in addition to understanding how the interactions established between federal government- Undime, federal government-municipalities and Undime-municipalities are characterized. The research developed is qualitative in nature and was conducted through analysis of documents and interviews with a representative of Undime-RJ and representatives of two municipal secretaries of education in the state of Rio de Janeiro. The main results indicate that Undime, as a hybrid political actor endowed with state capabilities, plays a relevant role as an articulator of the collaboration regime, in order to establish itself in the educational policy scenario as a representative of the interests and demands of municipalities before the federal government, and, on the other hand, plays a decisive role in ensuring adherence by municipalities to educational policies mobilized by the central government. Furthermore, the study pointed out that the implementation of the BNCC in the studied municipalities, in the context of the (re)development of local curricula, was promoted by internal actions and structuring of municipal departments, which mobilized state sub-capacities to align their curricula to the BNCC, without direct interventions from other public or private institutions.