As of August 18, the FRED API will require HTTPS requests. We recommend that you update the URLs in your code as soon as possible.

The FRED API has supported HTTPS since June to allow you time to test your applications with this secure protocol.

Please contact us at webmaster@research.stlouisfed.org or 314-444-FRED (3733) if you have questions or concerns.  Thanks for using FRED and the FRED API.