Hi.

Thanks for asking. If you're using the code above, then you're using a javascript driven version of our Editor. In otherwords you don't have a copy of our editor on your servers, just the above code that loads our editor from CodeCogs on demand. As such you don't need a licence just so long as you stay under 3000 per day. (Please also cache equations if you know how).

However. If you copy the code behind the entire editor directory from CodeCogs; then you do need a licence.

Sounds like your ok. Hope this help.