Command-line tool for the Simple Application Messaging Protocol (SAMP) for the Virtual Observatory (VO). This allows direct access to low-level operations such as starting a local SAMP communications hub for other applications such as Aladin, Topcat and Splat-VO to communication with each other.

In addition to starting a SAMP Hub, the 'jsamp' tool allows for monitoring, snooping, testing, and stress running hub instances, or setting up a bridge proxy between two or SAMP hub instances.