is there way to read comps and layers without opening after effects using extended script something

Have a look at this article: https://helpx.adobe.com/after-effects/using/automated-rendering-network-rendering.html

It provides guidelines on how you can run scripts using the aerender executable on Mac or Windows. The executable provides a -r flag where you can point to the script file. The page is not documenting it, but you can use aerender -help to see all options.

Alternatevlly, you can look at https://plainlyvideos.com. Plainly provides a full-blown render API. You can easily upload your AfterEffects projects in the web-app, select what text and images you want to change with each render and then provide new values simply when calling the API. Rendering can also be done using UI form, CSV or simply by connecting any supporting integration tool which allows you to make the process fully automated.

Try this: 

Run after effects script without opening after effects? 

is there  Adobe ExtendScript Toolkit or other Adobe APIs offer a way to run scripts headlessly or perform certain operations without fully launching the After Effects UI?