I can access the REST endpoint with the browser.
I created an API key and Postman and curl both return [] for this call.
This is the error I receive when I use the -v setting on curl:
< report-to: {"endpoints": [{"url": "https://dz8hshshs6s.cloudfront.net"}], "group": "endpoint-1", "include_subdomains": true, "max_age": 600} < nel: {"failure_fraction": 0.001, "include_subdomains": true, "max_age": 600, "report_to": "endpoint-1"}