Independent This document specifies the Jason Transfer Protocol (JTP), a compact binary protocol for listing and transferring images over a reliable ordered byte stream. JTP is designed to be simple to implement and efficient to parse. Images are addressed by a content-derived 64-bit identifier computed using xxHash64. The protocol supports catalog enumeration, point retrieval by identifier, delta synchronization, and connection reuse via a keep-alive mechanism. Transport security may be provided by TLS with an ALPN protocol identifier of "jtp/1". This document specifies the on-wire format of JTP version 1. It does not specify any particular implementation.