Monitoring API returns no data in a proxy environment

[koji117]

Monitoring API does not return any data in my environment with proxy.

Sample request is the following: http://my_proxy/monitoring/api/metric_data/mem.free/","query":{"service":"my_proxy-hostgeonode","last":"600","interval":"600

This returns: {"data":{"metric":"mem.free","input_valid_from":"2020-08-19T13:03:58.426725Z","input_valid_to":"2020-08-19T13:13:58.426725Z","interval":600,"label":null,"type":"value_numeric","axis_label":"B","data":[{"valid_from":"2020-08-19T13:03:58.426725Z","valid_to":"2020-08-19T13:13:58.426725Z","data":[]}]}}

The same configuration works fine in my local environment.

Does monitoring API require any additional setting for proxy?