Federal Human Capital Transparency Act This bill directs the Office of Personnel Management (OPM) to annually collect data relating to the federal workforce and post it on its website. Specifically, OPM must collect information on the total number of persons employed directly by each agency, the total number of prime contractor and subcontractor employees issued credentials allowing access to agency property or computer systems, the total number of employees of federal grant and cooperative agreement recipients who are issued such credentials, and a total count of the workforce of the agency.