How do RESTful Sensor intervals work?

I have a couple restful sensors that I’ve set scan_intervals for. But that value doesn’t appear to be honored. It doesn’t generate an error, but the docs page doesn’t list scan_interval as an argument. Is using homeassistant.update_entity the preferred way to update rest sensors? If I don’t set a scan_interval, how frequently does the sensor update?

(I’m running 2023.12.2)

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I am using this and it is respecting the scan interval.

To answer your question, i would assume that it is only updated on startup and update_entity service called