what do you want to archive? Why do you want "real time"?

I make a POST request to the API and create a data in the database and then when I try to retrieve the data with a GET request, I get the data of the application when it was built (ie null because there is no such data). but it seems to be created in the database.

which one should I use

which nextjs version are you using?

14.2.18

then your GET route handlers are cached by default. You need to revalidate them after you made a change. You can revalidate by path like:

revalidatePath("/api/whatever/route")

You call that function after you inserted your data.

Isn't there a shorter way to set this in the config file etc.?

Upgrade to nextjs15 and it's solved as well. In next15 the GET routes are not cached by default 🤷‍♂️

next.js gives error even though I useSearchParams in v15. that's why I use v14 unfortunately.

yea, I thought about you get other errors when you upgrade to v15. So in my opinion I would add the revalidatePath to the function that POST the data

keep in mind, that none of your data is then cached and your usage will go to the moon if you use it to much