JSPrismarine

Joining a server ​

Players need nothing from JSPrismarine: they join with the Minecraft: Bedrock Edition client they already have. This page is for them, and for the host answering their questions.

Add the server ​

  1. Open Minecraft and choose Play, then the Servers tab.
  2. Choose Add Server.
  3. Enter a name, the server's address, and its port. The port is 19132 unless the host changed server-port in config.json.
  4. Save it and select it from the list to join.

Which versions connect ​

The server speaks Bedrock protocols 2225 and 2193, so Minecraft 1.26.50 through 1.26.62 can join. The server list shows the newest of these. A client outside that range sees Minecraft's Outdated client or Outdated server screen: update the game, or ask the host to update the server.

Signing in ​

online-mode is on by default. With it on, the server checks each player's Xbox account the way a vanilla server does, so players sign in to Minecraft as usual. A host can turn online-mode off for a private network; anyone who reaches the server can then join under any name.

What works ​

JSPrismarine is under active development and does not do everything a vanilla server does yet. The parity tracker shows, behavior by behavior, what matches vanilla and what does not, and Commands and functions lists the commands you can type.

When you cannot connect ​

  • The server does not appear or times out. Check the address and the port. The server uses UDP, so a firewall or router has to let UDP traffic through on that port, not only TCP.

  • The server runs on the same Windows PC as the game. Windows blocks the Minecraft app from reaching its own machine. Run this once in PowerShell as administrator, then add the server as 127.0.0.1:

    powershell
    CheckNetIsolation LoopbackExempt -a -n="Microsoft.MinecraftUWP_8wekyb3d8bbwe"

    This may not work reliably under WSL2 with its experimental network bridge.

  • Consoles. Xbox, PlayStation and Switch do not offer custom servers in the Servers tab. Joining from them takes third-party tools that relay a featured server's slot; JSPrismarine does not provide one.

If none of this helps, ask on Discord or open an issue.