The PANAPI (Path Aware Networking Application Programming Interface Design and Implementation) project will design a sophisticated host-based network-path selection engine on top of the SCION network architecture and provide it as an open-source implementation of the abstract next-generation transport service API currently being drafted in the IETF TAPS Working Group PANAPI PANAPI will provide a powerful and extensible framework for automatic path property measurements path quality evaluation and optimized path selection complete with automatic load balancing and failure recovery in a PAN environment all hidden behind upcoming standard application-facing API abstractions