Can you get a Google search feed directly?
Only if Google chooses to work with you. AdSense for Search with related search for content pages is activated through a Google account manager, who must also approve a mock-up of your implementation. In practice that means established publishers with meaningful volume. Smaller operators reach Google's ads through an approved partner that holds the relationship.
Google's help pages state that Related Search on Content needs an active AdSense for Search account enabled by an account manager, compliance with the feature's policies and an approved design. There is no public self-serve form for arbitrage use.
A direct feed removes the provider's cut and gives you your own channels and reporting. It also makes you directly answerable for every click. Since August 2025 Google has limited certain features for publishers not in good standing, restoring them case by case. For most newcomers a hosted feed is the realistic start, and a direct relationship is something earned through a long record of clean traffic.