@krishna, Ok, I understand now.
I will really try to push you towards monday apps! It will greatly benefit you.
Firstly, polling is very an inefficient and resource heavy process.
Using the app triggers that I mentioned earlier, would meet your requirements.
This means that you don’t need to poll every 2 minutes as it will trigger automatically. You won’t need to store data of old items to check if there is a new item on the board.
Once you have created your recipe, you can then set up this integration on your board.
You would be looking at building an integration. This is the best place to start https://monday.com/developers/apps/quickstart-integration/
A monday app trigger is essentially a webhook. They act in the same way that it will call your endpoint when an event happens.
If you require more information on monday Apps, feel free to reach out, I am more than happy to provide some assistance.