Metaverse Exchange Protocol (MXP) is a second generation virtual environment protocol specification. MXP has a coherent theoretical model (Bubble Cloud) for networked virtual environments and proposes a working engineering solution. NVEs are in this context systems with multiple thin clients and servers simulating single seamless virtual environment. All parties are upkeeping local partial scene graphs which are synchronized using metaverse exchange protocol. MXP concentrates on messages required for the defined 3d simulation model. Official IRC channel is #mxp at freenode.org.