[1] - Run your own dynamic DNS service with Amazon Route 53 https://github.com/agorf/dyndns53
It seems the format of DynDNS HTTP posts is baked into a lot of products but obviously not every provider supports it
If one doesn't need or have a full blown server available, a cheap cloud server like the ones Hetzner offers for less than 3€/month should do.
It's very similar to yours, so I recommend you check it out!