@Anuhya-Y , in that case, I am not getting the API token from call 1 which is required to authenticate call 2.

@Anuhya-Y , @dugganab Thank you for offering your help so far.API & Authorization:Call 1 - Has Basic authCall 2 - Has Basic auth (same as Call 1) + API token received in Call 1 response header.Call 1 & Call 2 end points are not same

@dugganab , Yes, it's OOTB.But the point is I have to get the security token from call 1- response header. Then that security token needs to be applied when calling the main api (call 2) 

@dugganab , in that case, how to accommodate two calls in same action & retrieve the response header?

@dugganab , seems like Basic Authentication is not supported in authenticationType. The system we are trying to access is using Basic auth (user & password) for call 1 to get the token. Hence, the authentication is not getting successful. 

@dugganab , I am trying but it is not successful yet. So, to clarify, in the custom action > custom authorization > I have to put the entire request that get the API token (call 1) > then the token will be applied to call 2. So, I just need one custom action. Please confirm.

@Anuhya-Y , thank you for your response. Let me check. 

@dugganab thanks for your response. The external system is designed to send API token in response header ONLY. So, we need a way to retrieve data from response header. 

Hello, In one of our clients' use case, we are working with an external system to which we need to make two API calls.Call 1: Will give an API token. This API token is sent in response header (not in response body)Call 2: Using the token from call 1, we have to call another API end point to save/upd...

Thank you @brekrut for your response.But that documentation is not helping. These are different types of authentication that I already tried but nothing is working. Related Adobe documentation does not mention, from where in GCP we can collect those information.