Hi! You can try our beta server https://market.mashape.com/vanitysoft/beta-boundaries-io
Please remember that the “mashape UI” does not work wel at alll with large datasets. Please test our API within your application or system! Let us know if you have any other questions info@vanity-soft.com . Thanks

Also check out Google Data layers:

https://developers.google.com/maps/documentation/javascript/datalayer