The WebCargo Domain Check API (also referred to as the Domain Availabily API) allows you to deeply probe a domains availability. The RESTful API also uses multiple methods to check an email addresses authenticity. The API's end-point accepts a domain as the argument and performs an availability check and returns the status of the domain as a Boolean embedded in a JSON object.
500 free queries per month are included. Additional query pricing information is available here: https://webcargo.io/pricing.
WebCargo was created to speed up development workflow by reducing time developers lose while integrating and maintaining mundane services.