area: email
action: uploadlistbyurl
https://api.hypermail.com/api.php?apikey=YOURAPIKEYHERE&area=email&action=uploadlistbyurl&url=http://ww.yoursite.com/yourlist.csv
<response>
<id>1</id>
<status>Processing</status>
</response>
{
"id": "1",
"status": "Processing"
}