I can get you a Sync Token for €29 / year, but you can also get one yourself, just read below.Get a Sync Token
You can use a Cloud Service Provider like IBM Cloudant.
After you get either done, you create a DB (any name works) and then the Sync Token is the full DB URL with username and password, like
https://user:pass@hostname/dbname (no trailing slash!).
With a Sync Token, you can also use the web app (beta).