US Patent 11658962 Systems and methods of push-based verification of a transaction

A system and method of implementing an API of an authentication service includes implementing a confirmation API, wherein the implementing includes: initiating a confirmation API request based on receiving an access request, wherein the confirmation API request operates to perform an authentication of a requestor making the access request; identifying the requestor based on a search of the requestor via the confirmation API; identifying, by one or more API endpoints of the remote authentication service: (i) a subscriber account of the subscriber maintained by the remote authentication service and (ii) identifying a user device of the requestor that is enrolled with the subscriber account based on the confirmation API request; transmitting a confirmation request to the user device; obtaining from the user device a response to the confirmation request and presenting the response to the confirmation request to the subscriber; and granting or denying the access request.