Google has added a new user agent to its help documentation named Google-CWS. This is the Chrome Web Store user agent that is a user-triggered fetchers.

More details. Google posted about the new user agent over here, it reads; “The Chrome Web Store fetcher requests URLs that developers provide in the metadata of their Chrome extensions and themes.”

Google Cws Agent ScaledGoogle Cws Agent Scaled

What are user-triggered fetchers. A user-triggered fetchers are initiated by users to perform a fetching function within a Google product.

The example provided by Google was “Google Site Verifier acts on a user’s request, or a site hosted on Google Cloud (GCP) has a feature that allows the site’s users to retrieve an external RSS feed. Because the fetch was requested by a user, these fetchers generally ignore robots.txt rules. The general technical properties of Google’s crawlers also apply to the user-triggered fetchers.”

Why we care. If you see this user agent in your crawl logs, you now know where it is from. The Chrome Web Store fetcher requests URLs that developers provide in the metadata of their Chrome extensions and themes.


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Barry SchwartzBarry Schwartz

Barry Schwartz is a technologist and a Contributing Editor to Search Engine Land and a member of the programming team for SMX events. He owns RustyBrick, a NY based web consulting firm. He also runs Search Engine Roundtable, a popular search blog on very advanced SEM topics.In 2019, Barry was awarded the Outstanding Community Services Award from Search Engine Land, in 2018 he was awarded the US Search Awards the “US Search Personality Of The Year,” you can learn more over here and in 2023 he was listed as a top 50 most influential PPCer by Marketing O’Clock.Barry can be followed on X here and you can learn more about Barry Schwartz over here or on his personal site.


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Last Update: November 3, 2025