[qwertox]

So they seem to have a special agreement.

1.3 Your Obligations. You shall receive a Query from the End User and shall forward that Query to Google. You may not in any way frame, cache or modify the Results produced by Google, except as otherwise agreed to between You and Google.

https://support.google.com/programmable-search/answer/171430...

[anshumankmr]

I suppose a they may have written a service to query Google and there may be a CDN caching responses from that, which can be argued as not being a permanent datastore which I believe Google may be more likely have a problem with. It could also depend on the fact whether Google is willing to send a cease and desist over this.

However, I am no lawyer, so take it with a grain of salt.