This API is REST API. To troubleshoot this kind of issues it's suggested to use
Fiddler to view the HTTP request and response. Could you please launch Fiddler, run your test code and, after you get the response in Fiddler, post the request (please make sure the api key
is masked) and response (please mask sensitive data if needed) in this thread? Then we can know what the problem is.
If there is no data returned probably there is no inbound link identified for the specified site URL.
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