Whilst there isn't a specific example of how you can use SAS to send messages through Gov.UK notify, I notice that there is an API document for this under: https://docs.notifications.service.gov.uk/rest-api.html#rest-api-documentation   If by going through this you are able to get this working outside of SAS (using something like Curl or Postman), then you should be able to replicate that by feeding the same parameters into Proc HTTP (SAS), please see the following document for Proc HTTP: https://go.documentation.sas.com/?docsetId=proc&docsetTarget=n0bdg5vmrpyi7jn1pbgbje2atoov.htm&docsetVersion=9.4&locale=en   If you need assistance with Proc HTTP you can also contact SAS Technical Support. ... View more