I am not able to find Adword API support in Google App Script,I can write adword script from adword account but currently i\'m handling multiple account(almost 25) what i have t
There are some example scripts regarding Adwords associated with these posts: http://searchengineland.com/four-ways-you-can-benefit-by-using-adwords-scripts-145530 http://googleappsdeveloper.blogspot.co.uk/2012/12/adwords-analysis-in-google-apps-script.html?m=1
If I understand correctly, the main problem is that you want to to basicaly make a "code library?" So reuse the same bits of code between accounts?
One option is to use the Eval function, as detailed in tip 3 of this article: http://www.ppchero.com/tricks-for-running-adwords-scripts-in-multiple-accounts/. A second example of using this same method is here: http://www.freeadwordsscripts.com/2013/10/use-gdrive-to-load-single-adwords.html
You would then upload this into Google Drive, or point this to the location of the Google Script.
Another option, as detailed in the PPC Hero Article, is to use Google Sheets to pass the variables you need from one script to another. Basically, the SpreadsheetApp function works within all AdWords scripts, so you can use this to pass data along from external sources.