Provided a method for creating a searchable registry based on a ontology for IoT devices and associated data feeds. The method can include registering a IoT device and its associated data feed in a record with a searchable registry; creating relationships between IoT devices and associated data feeds; associating the records with one or more ontology terms of a hierarchical ontology describing a characteristic of the IoT device, the associated data, the relationships or all of them; and providing a response to a request of an IoT device based on the mapping.