为什么Alexa awis api停止为我工作? 301永久移动错误

We use Alexa awis API to pull in data. It seems to have stopped working around January 30th 2019, but we didn't change anything I know about on our end.

Our URL we are requesting is http://awis.amazonaws.com/?AWSAccessKeyId={{AWSACESSKEYID}}&Action=TrafficHistory&Range=30&ResponseGroup=History&SignatureMethod=HmacSHA256&SignatureVersion=2&Start=20190513&Timestamp=2019-06-11T19%3A38%3A02Z&Url=facebook.com&Signature={{SIGNATURE}}%3D

and I'm getting a response saying

"301 Moved Permanently"

I can't find any info on this online. Was there something recently changed?