You can also try this link:   http://docs.splunk.com/Documentation/Splunk/latest/Installation/Systemrequirements ... View more

According to Splunk documentation, you can uses SAML with tokens: "Create authentication tokens to use the REST APIs. Tokens are available for both native Splunk authentication and external authentication through either the LDAP or SAML schemes. To learn more about setting up authentication with tokens, see Set up authentication with tokens  in the Securing Splunk Enterprise manual." There are some SAML side requirements such as (per token doc):  "Single Sign-On (SSO) schemes that use SAML. These schemes must either support Attribute Query Requests (AQR) or provide information through scripted authentication extensions." Hope this helps! ... View more

What we usually do is go to that metric in the AppD UI and then right click to "copy full path" (not REST). That works for us as it converts it to a REST as part of the add-on functionality. Hope that helps! Guessing by now you've sorted it, but responding in case others come looking so they have something to work with. ... View more