NetBox - Next available prefix in Aggregates via API

[DonatasDG]

Hello Community,

I have a question regarding Aggregates next available prefix creation via API .

In the GUI, there is a button "+ Add Prefix":

IPAM -> Aggregates -> Select Aggregate -> Select Prefixes Tab -> + Add Prefix

It gives me the next available prefix to use within Aggregation, for example:

How I may do the same but via API? How I may get next available prefix within Aggregate via API?

NetBox version - 4.3.3

Thank you for the help.