Authenticate user using OTT

Document ID : KB000099522
Last Modified Date : 06/06/2018
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Question:
I'm trying to create a service on CA API gateway that authenticates
user using Siteminder (version 12.7).  Is there a rest service that i
can use in order to authenticate user ?
Answer:
For REST user authentication, you could check if the Web Services on
Access Gateway can fulfill your needs, as it can authenticate and
authorize:

https://docops.ca.com/ca-single-sign-on/12-7/en/configuring/ca-access-gateway-configuration/configuring-the-authentication-and-authorization-web-services 
https://docops.ca.com/ca-single-sign-on/12-7/en/configuring/ca-access-gateway-configuration/configuring-the-authentication-and-authorization-web-services/#ConfiguringtheAuthenticationandAuthorizationWebServices-AuthenticationRESTInterface