I'm using this one with Google Cloud, although it only checks IPs using a single provider (otherwise it's pretty much the same as you're describing it): https:

I'm using this one with Google Cloud, although it only checks IPs using a single provider (otherwise it's pretty much the same as you're describing it): https://github.com/andreycizov/ddns-gcloud https://github.com/andreycizov/ddns-gcloud