I tried to configure New Relic Add-on for integrating Splunk with New Relic.
I couldn't see data coming through after configuring inputs. I got to know that New Relic account is hosted in Europe and the endpoint is 'https://api.eu.newrelic.com/v2/'.(For insights - https://insights-api.eu.newrelic.com/v1/accounts/)
I had to change 'api_base_url' in 'input_module_new_relic_account_input.py' script for configuring Account Input and url in 'new_relic_insights.cc.json' for New Relic Insights.
It would be better to pass these domain names as parameters instead of hard coding them. This would also help in monitoring New Relic metrics from different geo locations. Please consider this change for future releases. Thanks.