The audio overview is the feature that made NotebookLM famous, and the one people most want to run in a loop — one podcast per report, per client, per week. Doing that without clicking is possible by three different routes, and they are not equivalent.
Zapier's NotebookLM page says the integration has not been built. Make has no module. n8n has no node. Every walkthrough you find does something adjacent — saving files to Drive, which you then add to a notebook by hand.
That is the honest state. What follows is the workaround that actually automates the part people want: asking a question and getting a citation-backed answer into the workflow.
If your script waits until midnight for the quota to reset, it is waiting for something that no longer happens. On 2 September 2026 Google replaced NotebookLM's fixed daily chat caps with a compute-based allowance that refreshes every five hours, up to a weekly ceiling.
Our own documentation said "50 queries per day, resets at midnight UTC" until this week. It was wrong, and we had been repeating it for months.