GoDaddy really lived up to its bad reputation and recently changed their API rules. The rules are simple: either you own 10 (or 50) domains, you pay $20/month, or you don’t get the API. I personally didn’t get any communication, and this broke my DDNS setup. I am clearly not the only one judging from what I found online. A company this big gating an API behind such a steep price… So I will repeat what many people said before me (being right): don’t. use. GoDaddy.
This is what NameCheap does too. It’s freaking stupid. Domain registrations should not be managed by corporations.
Recommend cloudflare for DNS. I use it for DDNS via API and it works great.
You also basically pay the wholesale rate without markup for the domain.
Warning: Cloudflare does not allow you to change the nameservers of domains you register with them unless you pay for some insanely priced subscription. For many of us who register domains at various registrar’s but want to be able to centrally manage DNS, hiding such basic functionality behind an extremely steep paywall makes Cloudflare a no-go.