FedBrain is a an economic data aggregator. The FedBrain data is acquired from public domain sources, such as the CIA, International Monetary Fund, World Bank, and the U.S. Federal Reserve Banks. The Country-by-country economic data is updated once per year and the U.S. Federal Reserve data is updated every 2 hours, every day of the year. An account is required with service, and API key is used for authentication, and the API is currently free to use. The API uses REST calls.