Hello,
> The point of my question is that I would like to use NSD as a DNS server
> for my zones and have the ability to change some IN A records trough a
> custom API to make my own dynamic DNS.
I think you're asking for a REST API or a Web-based interface. Neither
of those exist for NSD, at least not that I'm aware of. If you really
want to go that route, you'd have to create a provisioning system which
subsequently produces zone master files ready for NSD to compile and
serve.
(What you _could_ do, but that entails using more software, is to, say,
set up a PowerDNS authoritative server which has a back-end database,
and have your NSD slave zones from it. But that is a bit off-topic for
this list, I think. :)
Regards,
-JP