The correct URL depends on if you have a trial account or where your account resides (AWS or GCP).
For trial accounts, the first URL should work.
In GCP, use the second URL, but change the port to 443.
In AWS, use
https://http-inputs-prd-p-xxxxxx.splunkcloud.com:443/services/collector/event
See https://docs.splunk.com/Documentation/Splunk/8.2.4/Data/UsetheHTTPEventCollector#Send_data_to_HTTP_E... for more information.
---
If this reply helps you, Karma would be appreciated.
