I need to invoke an external REST API through HTTP POST call from CA RA. How to do this from CA Release Automation 6.5 ?
You can use "REST Operation" action type.
Web - CA Release Automation - Integrations - CA Technologies Documentation
Here is Q&A about REST Operation including sample.
Rest Operation - Usage
Thank you Yasuyuki-san. I will check and update !!
As it seems you could resolve according to another thread: How to send Deployment Status,Appname to external third party application's REST API ? , I marked correct answer.