Hi @Rohan Roy,

Refer below step by step articles to expose and consume REST API in OutSystems.

Consume REST API - https://success.outsystems.com/Documentation/11/Extensibility_and_Integration/REST/Consume_REST_APIs

Expose REST API - https://success.outsystems.com/Documentation/11/Extensibility_and_Integration/REST/Expose_REST_APIs

REST API - https://success.outsystems.com/Documentation/11/Extensibility_and_Integration/REST

Also, you can refer to this training material - https://www.outsystems.com/training/courses/116/integrating-with-web-services/

Moreover that I could see from your attached OML, I could see you are exposing API in the reactive module and creating a screen in the same module.. This is not a best practice. 

Create a new application/  core module (blank) to expose REST API data and another application or Reactive module to consume API data and display it into the front end screen.

Thanks, Aadhavan S

Hello Rohan Roy, 

Firstly you must finish your exposed service, by simply add an output to it.

After that you can Consume this API by adding a Consume REST API with your Exposed URL API. 

e.g: server/application/<URL present on your exposed API>.

The easy part now is to display this result on the screen ;)

Hope it help

Best Regards,

Tomás Dionísio.