Questions about Formula, and last update column

Hi guys, I hope you’re good todya !
I have a few questions for you :

  • can a formula column be requested in parameter via the API (or the playground) ?
  • can the last update column be a date instead of a time and a date ? Or can we make a request with this value (datetime) in parameters (like in a items_by_column_values request )?
  • My goal is to get all the items (via the APi) who have been updated in a certain lap of time (like 30 minutes or an hour). Do you have any idea of how I could do this ?
    I’ll really appreciate it !

Have a nice day :slight_smile: