I was referring to this document newrelic_api/README-old.rdoc at master · newrelic/newrelic_api · GitHub to update the apdex t value for an application in new relic. I was referring to the api
https://api.newrelic.com/api/v1/accounts/:account_id/application_settings/:app_id.xml mentioned in the document to view/update the application settings.
I am passing admin api key in the header to view the application settings. However I am getting 403 Forbidden error always. Please let me know whether the above api is valid and the api key which I am passing should be admin api key or personal api key ?