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If you are looking for an authoritative DNS server with a sane API try KnotDNS [1]. Really easy to automate dynamic updates using `knotc` [2] without worrying about manually updating zone files.

[1] https://www.knot-dns.cz

[2] https://www.knot-dns.cz/docs/3.0/html/man_knotc.html

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BIND has supported dynamic zones for like 15 years. Declare the zone dynamic, generate a key, apply the key to the zone as authorized to make changes, and then use nsupdate command to make changes

===

nsupdate -k your.keyfile

server ns.your.zone

update add foo.your.zone. 3600 IN A 1.2.3.4

send

===

You can script it too if you want

Indeed, it's the only way to fly is using DNSSEC

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