The Alexa endpoint is returning -1 for popularity and reach:

HTTP/1.1 200 OK

Connection: keep-alive

Content-Length: 41

Content-Type: application/json

Date: Thu, 17 May 2018 07:07:02 GMT

Server: Mashape/5.0.6

Via: 1.1 d3617d950023ee8165fc850d9a6b0b97.cloudfront.net (CloudFront)

X-Amz-Apigw-Id: HBODdH-qjoEFuBg=

X-Amz-Cf-Id: JSTqLqDtLpErCIKsbBWMRy-MfOHnOzaRHyMHbAEtWUXwlld8naqa8A==

X-Amzn-Requestid: e5ecc92a-59a0-11e8-b497-490b69aab976

X-Amzn-Trace-Id: Root=1-5afd2a16-b20ba8d4ea5c8f51a433fd90

X-Cache: Miss from cloudfront

X-Ratelimit-Queries-Limit: 1000

X-Ratelimit-Queries-Remaining: 950

{

“popularity_rank”: -1,

“reach_rank”: -1

}