The Cecad tool (Consultation, Selection and Extraction of the Unified Registry Information) allows access to data from the Unified Registry through aggregated and individualized information for managers and other data systems. It is today used by several Brazilian social programs. The text describes the construction process of the application and shows how the Social Tariff for Energy uses Cecad to grant discount on electricity bills for low-income beneficiaries, such as the residents of the Santa Marta Community in Rio de Janeiro.