Determining the IP address of the node that executes the UrlFetchApp call

Question

For a Web API call via UrlFetchApp in a Google Apps Script I have to submit the HTTP client IP (via HTTP-GET) for authentification (namecheap.com API).

Is there a way to determine the IP address of the node that will execute the UrlFetchApp call for adding it to the query URL?

Answer 1

No, it is not possible. However, Google does provide you with a range of IP addresses through which the call will be made. See https://developers.google.com/apps-script/jdbc#accessing