All the API endpoints that ends in "/hits" has been updated (due to various reason) to the mandatory use of the argument "timeframe"
If you're using it in the old way, e.g. /hits?fromDay=20141201000000&toDay=20141231000000 you just need to add to the request "timeframe=custom", e.g. /hits?timeframe=custom&fromDay=20141201000000&toDay=20141231000000
The timeframe variable supports also (localized to your timezone) the following:
- last7 (last seven days)
- custom (to be used with the params fromDay/toDay)
We're sorry for the issue.