I have a tool that syncs my DNS records to CloudFlare using flat files that I keep under version control. I just extracted it from my personal tool set:

https://github.com/dnerdy/namesync

This flat file format seems to work well, and the tool could potentially be updated to support other DNS providers.

That is much more useful to me than the OP service. Thanks.

Interesting comment, thanks.

It's not impossible we could allow a per-zone destination to be setup, and upload to Google, Amazon, CloudFlare, or somebody else.

To expand... the issue I have with CloudFlare's dns is that it isn't under version control. I suspect plenty of other people have this issue too.