In Google Search Console, you can use the URL Inspection Tool to test how Google sees a URL in its index versus in real time by using the live test button.
Jamie Indigo asked on Twitter how long does that URL for the live test cache. Daniel Waisberg of Google responded that it lasts about 90 days.
Here is a fake sample of the URL that Google would generate for the live test result:
https://search.google.com/search-console/inspect?resource_id=sc-domain%3Aseroundtable.com&id=E93q4fstWFGmdDWvrn57Rw&alt_id=rKx9gJiSXKBLL9bABgVt1Yw
That makes it so the next time you want to go back to that specific live test, the test results can load within a second versus 30 or more seconds. But eventually that URL will stop working, in about 90 days after it was initially generated.
Here are those tweets:
No dumb questions: How long are @googlesearchc live results cached for?
— Jamie Indigo 💙💛 100% Human Tech SEO (@Jammer_Volts) April 27, 2022
Less than forever... *about* 90 days. pic.twitter.com/3cdEspeYui
— Daniel Waisberg (@danielwaisberg) April 28, 2022
Forum discussion at Twitter.