The described technology is generally directed towards communication network application programming interface (API) promulgation. Using the techniques herein, APIs can be hosted at different locations within a network in a transitory manner, shifting from one location to the next. Furthermore, API configurations can change over time, in order to provide enhanced API security and/or to meet different expected needs of client equipment. An API manager can select network equipment to host APIs, in order to move the APIs between different network locations. A floater application within the core network can support the movement of the APIs by creating secure tunnels between the selected network equipment and the core network.