FRED API requires HTTPS starting August 18

Developer API

The Economic Research Division of the Federal Reserve Bank of St. Louis has created APIs (application programming interfaces) to allow developers to write programs and build applications that interact with content on its websites.

Users may query our Federal Reserve Economic Data (FRED®) and Archival Federal Reserve Economic Data (ALFRED®) databases to retrieve the specific data desired (according to source, release, category and series among other preferences).