@abdulr697 In Pega, when you are making a service call such as Service-REST, you can configure the Authorization header in the Service Package that the Service is attached to. This is defined by the first part of the Service-REST rule identifier. Pega needs to have authenticated the caller of the service before the Service Activity in your REST Service runs. If you are using "Basic" or "OAuth 2.0" authentication, the Authorization HTTP header - including a "Basic" label in the value - is the transport for "Basic" authentication.

If your Authorization header does not adopt the "Basic" scheme, and is some sort of 'custom' scheme, then you need to implement a custom Authentication Service and configure the Service Package to use an Authentication Type of "Custom".

However, if you are trying to open a URL from a Pega application (like a link in a section), there is no OOTB way to send an Authorization Header. You might need to create a custom solution for this.

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Service-Rest : How to make Servie-rest to authenticate using Authorization in H

Is there an OOTB action that allows accessing external web applications from Peg