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Configuring your client

Using Drasl on the client requires a third-party launcher that supports custom API servers. Fjord Launcher, a fork of Prism Launcher, is recommended, but HMCL also works. Both are free/libre.

Or, if your launcher supports custom API servers but not via authlib-injector, use the following URLs:

Configuring your server

Minecraft 1.16 and later

On recent versions of Minecraft, you can use Drasl on an unmodified Vanilla server. To do so, add the following arguments before you specify the jar file when you start the server:

-Dminecraft.api.env=custom
-Dminecraft.api.auth.host=https://yggdrasil.mc.danloona.nl/auth
-Dminecraft.api.account.host=https://yggdrasil.mc.danloona.nl/account
-Dminecraft.api.profiles.host=https://yggdrasil.mc.danloona.nl/account
-Dminecraft.api.session.host=https://yggdrasil.mc.danloona.nl/session
-Dminecraft.api.services.host=https://yggdrasil.mc.danloona.nl/services

For example, the full command you use to start the server might be:

java -Xmx1024M -Xms1024M \
    -Dminecraft.api.env=custom \
    -Dminecraft.api.auth.host=https://yggdrasil.mc.danloona.nl/auth \
    -Dminecraft.api.account.host=https://yggdrasil.mc.danloona.nl/account \
    -Dminecraft.api.profiles.host=https://yggdrasil.mc.danloona.nl/account \
    -Dminecraft.api.session.host=https://yggdrasil.mc.danloona.nl/session \
    -Dminecraft.api.services.host=https://yggdrasil.mc.danloona.nl/services \
    -jar server.jar nogui

Minecraft 1.7.2 through 1.15.2

Refer to the authlib-injector documentation on setting up a server.

Alternatively, you can patch your server to use a newer version of Mojang's authlib that supports the arguments for custom API servers. Replace the files under com/mojang/authlib in your server.jar with the files in authlib-1.6.25.jar.

Late Classic, Alpha, Beta, etc. through Minecraft 1.6.4

Use OnlineModeFix and start the server with the -Dminecraft.api.session.host argument described above. For example, the full command you use to start the server might be:

java -Xmx1024M -Xms1024M \
    -Dminecraft.api.session.host=https://yggdrasil.mc.danloona.nl/session \
    -Djava.protocol.handler.pkgs=gg.codie.mineonline.protocol \
    -cp server.jar:OnlineModeFix.jar \
    net.minecraft.server.MinecraftServer \
    nogui