Google-NotebookLM

What user agent does Google-NotebookLM use?

Google lists Google-NotebookLM only as the former user agent of this fetcher, kept until August 2026. Since NotebookLM became Gemini Notebook, the fetcher sends Google-GeminiNotebook instead.

How do I block Google-NotebookLM?

Google publishes no robots.txt token for it, and says that because a person asked for the fetch, its user-triggered fetchers generally ignore robots.txt.

How do I check that a Google-NotebookLM visit is real?

Anyone can put a crawler’s name in a user agent, so the name alone proves nothing.

Google publishes the IP ranges its user-triggered fetchers use. A reverse DNS lookup of a genuine request’s IP address gives a host name under google.com or gae.googleusercontent.com, and a forward lookup of that name returns the same address.

Spreelytics runs this check for you. Every crawl that claims to be Google-NotebookLM is compared with the IP ranges Google publishes, refreshed every 12 hours, and one from outside them counts as spoofed.

How do I see Google-NotebookLM visits on my site?

Your server’s access logs record the user agent of each request, so you can search them for “Google-NotebookLM”.

Or add the Spreelytics server middleware, @spreelytics/ai-crawl. It recognises Google-NotebookLM by its user agent and counts each visit on the Bots page under AI answers, as Gemini, apart from your visitor numbers.

Sources: developers.google.com/crawling/docs/crawlers-fetchers/google-user-triggered-fetchers#gemini-notebook, developers.google.com/crawling/docs/changelog, developers.google.com/crawling/docs/crawlers-fetchers/verify-google-requests