I have a WhoIsXMLAPI account and most queries work fine. I am running into some that do not seem to parse JSON correctly. Namely the SeoTools components return NULL for Created/Updated/Expires dates and Name Servers. I run the queries directly on WhoIsXMLAPI and data is returned fine. Examples of URLs that do not parse correctly are: ap-login.co.uk, atozdeals.co, atozdeals.de, bigdogdomains.co, business-dropbox.me
Do you have a specific request example for me to reproduce?