I have an input text box on a 3rd party site webpage and this webpage is simple HTML page. In the input textbox, I want to validate if entered number is valid or not.
I can do this by jquery by defining if entere number is 123 or 456, if not then alert not valid. But anyone can inspect the page and see what numbers are allowed.
I was thinking if I can save valid numbers in a data extension in marketing cloud and do an ajax call from HTML page to data extension records and check if entered number in textbox matches with records in data extension or not.
Is this possible? Any advice?