Calling a REST service from openEMR

I installed OpenEMR v5.0.0 on my laptop with an intent to call an external REST API from the openEMR portal. Post installation, I went to ‘http://localhost/openemr’ and able to log on to the portal but not sure where in the portal would I do the development to call a REST API. Any help or pointer would be greatly appreciated.

The short answer is that you need to do it from the code side not, the application side.

Do you know how to write PHP code?

thank you, I was able to get this working.