Search a keyword exactly only on a specific list of web-pages?

I have a list of 307 web-page URLs. Is it possible to tell Google (or another search engine) to search a specific keyword EXACTLY only on those 307 websites?

I have read some advices which tell to cycle through the list with a script or similar and perform a Google search for each list item. But wouldn't this make Google think you are a bot and block the searches?

Another suggested method was to download those 307 webpages with wget (perhaps using a script) or similar and then do a local search in those downloaded web-pages. But that would take a long time while a Google search would be almost instantaneous.

Doesn't Google have a built-in method to search from a list of URLs?