A system for link device authentication includes a computing device configured to acquire, from an originating device, an identifier of an endpoint device, obtain an endpoint device authentication code corresponding to the identifier, determine, as a function of the identifier, a location of the endpoint device, identify a plurality of link devices, select, from the plurality of link devices, at least a probabilistically verified link device as a function of the location of the endpoint device, and transmit, to the at least a probabilistically verified link device, the endpoint device authentication code.