Can I fetch monthly CPC through the AdWords API

Hi, I'm a starter and want to develop a client side application to fetch data like Monthly Search Volume and CPC for the keyword I pass. I'm using the API available for that (.Net). I've gone through the sample examples provided in the API, but I got confused as why all the types of the web service

How to fetch search volume and CPC

Hi, I'm new to AdWords. I have created a MCC account. I'm trying to develop a client side application in .net that should fetch Search Volume and CPC for a keyword using the AdWords API. Since I'm new, can you help as to using which web-service of the API would suffice my need? Thanks -- =~=~=~=