In embodiments of mesh network commissioning, a commissioning device of a mesh network can establish a commissioning communication session between the commissioning device and a border router of the mesh network, and also establish a joiner communication session between the joining device and the commissioning device. The commissioning device can then send commissioning information to the joining device, where the commissioning information is usable by the joining device to join the mesh network. The commissioning device receives an indication of a location of a commissioner application from the joining device, utilizes the received indication to retrieve the commissioner application, and executes the commissioner application to provision the joining device.