Differentiating between NULL and '0' (zero) in an API endpoint

Hi there! I have an endpoint that has a parameter for a minimum and maximum number which it uses to find a record within the DB. However, if I set the max to 0 in the API call, for some reason, Xano returns records when there should be none. I believe this is because Xano is registering 0 as NULL (and thus empty, meaning it won't be applied to the DB query).

Is there any way to resolve this issue so that Xano will understand 0 as an actual zero? Thanks!