Splunk REST APIs don't support OAuth authentication.  But maybe this solution with a web server or LDAP will help you: https://community.splunk.com/t5/Security/Does-Splunk-support-oAuth-2-0-single-sign-on/m-p/292745/highlight/true#M7832  You can use a username/password for a Service Account but you'll need to give the Service Account access to read the information you want Splunk to be able to collect/access. It only needs read rights.  You can find examples of how to use username/password in requests here: https://docs.splunk.com/Documentation/Splunk/latest/RESTUM/RESTusing or you can use authentification with Python script and use a session key in your requests: https://docs.splunk.com/Documentation/Splunk/8.2.4/RESTTUT/RESTsearches ... View more