SMPP Open Source. Smppapi » Home. Jsmpp - Project Hosting on Google Code. Announcement: The repository migrated to github feel free to fork for enhancement JSMPP is a java implementation (SMPP API) of SMPP protocol (currently support SMPP v3.4). It provides interfaces to communicate with Message Center or ESME (External Short Message Entity) and able to handle traffic 3000-5000 messages per second. SMPP is stand for Short Message Peer to Peer.