Rocket Validator looks for accesibility violations on your pages using the axe-core accessibility engine, hosted on our own servers and integrated into our web crawler. You don't need to buy an additional license, everything's already included in your Pro account at Rocket Validator.
A11Y check: ARIA attributes must conform to valid names
Accessibility rule: ARIA attributes (i.e. starting with aria-) must have valid names. Referring to a misspelled attribute or to one that does not exist will result in an invalid attribute and thus failure of this Rule.