This API is a web service that allows developers to write programs and build applications that retrieve economic data from FRED® and ALFRED®. It contains frequently updated US macro and regional economic time series at annual, quarterly, monthly, weekly, and daily frequencies and aggregates economic data from various sources. It returns requests including; data source, release, category, series, and more. This allows you to query the Federal Reserve Economic Data and Archival Federal Reserve Economic Data databases to retrieve the specific data desired and accommodates any programming language that can parse XML or JSON. These websites are hosted by the Economic Research Division of the Federal Reserve Bank of St. Louis.