for US stocks i am trying to get the call and put option prices for at the money strike at any gi...

Hi @ramanand.sn,

On Workspace, you can find this data on the Workspace Desktop App 'OPW' named Option Watch.

To programmatically find this info. via APIs, we wrote an articles that goes through exactly that:
Functions to find Option RICs traded on different exchanges

Finding Expired Options and Backtesting a Short Iron Condor Strategy
Implied Volatility and Greeks of Index 'At The Money' Options: Part 1

Do let us know if they have the information you are after.

I would advise using the Search API, as per that last article listed above.