Adding commands to set server settings:

/creaturechat key set <key>
/creaturechat url set "<url>"
/creaturechat model set <model>
/creaturechat help

src/main/java/com/owlmaddie/ModInit.java

@@ -2,6 +2,7 @@ package com.owlmaddie;
 
 import com.owlmaddie.chat.ChatDataManager;
 import com.owlmaddie.chat.ChatDataSaverScheduler;
+import com.owlmaddie.commands.CreatureChatCommands;
 import com.owlmaddie.goals.EntityBehaviorManager;
 import com.owlmaddie.goals.GoalPriority;
 import com.owlmaddie.goals.TalkPlayerGoal;
@@ -53,6 +54,9 @@ public class ModInit implements ModInitializer {
 		// However, some things (like resources) may still be uninitialized.
 		// Proceed with mild caution.
 
+		// Register server commands
+		CreatureChatCommands.register();
+
 		// Handle packet for Greeting
 		ServerPlayNetworking.registerGlobalReceiver(PACKET_C2S_GREETING, (server, player, handler, buf, responseSender) -> {
 			UUID entityId = UUID.fromString(buf.readString());

src/main/java/com/owlmaddie/commands/CreatureChatCommands.java

+package com.owlmaddie.commands;
+
+import com.mojang.brigadier.CommandDispatcher;
+import com.mojang.brigadier.arguments.StringArgumentType;
+import com.mojang.brigadier.builder.LiteralArgumentBuilder;
+import net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents;
+import net.minecraft.server.command.CommandManager;
+import net.minecraft.server.command.ServerCommandSource;
+import net.minecraft.text.Text;
+
+/**
+ * The {@code CreatureChatCommands} class registers custom commands to set new API key, model, and url.
+ * Permission level set to 4 (server owner), since this deals with API keys and potential costs.
+ */
+public class CreatureChatCommands {
+
+    public static void register() {
+        ServerLifecycleEvents.SERVER_STARTING.register(server -> {
+            CommandDispatcher<ServerCommandSource> dispatcher = server.getCommandManager().getDispatcher();
+            registerBaseCommand(dispatcher);
+        });
+    }
+
+    private static void registerBaseCommand(CommandDispatcher<ServerCommandSource> dispatcher) {
+        dispatcher.register(CommandManager.literal("creaturechat")
+                .then(registerSetKeyCommand())
+                .then(registerSetUrlCommand())
+                .then(registerSetModelCommand())
+                .then(registerHelpCommand()));
+    }
+
+    private static LiteralArgumentBuilder<ServerCommandSource> registerSetKeyCommand() {
+        return CommandManager.literal("key").then(CommandManager.literal("set").then(CommandManager.argument("key", StringArgumentType.word())
+                .requires(source -> source.hasPermissionLevel(4))
+                .executes(context -> {
+                    String key = StringArgumentType.getString(context, "key");
+                    context.getSource().sendFeedback(() -> Text.literal("API key set to: " + key), false);
+                    return 1;
+                })));
+    }
+
+    private static LiteralArgumentBuilder<ServerCommandSource> registerSetUrlCommand() {
+        return CommandManager.literal("url").then(CommandManager.literal("set").then(CommandManager.argument("url", StringArgumentType.string())
+                .requires(source -> source.hasPermissionLevel(4))
+                .executes(context -> {
+                    String url = StringArgumentType.getString(context, "url");
+                    context.getSource().sendFeedback(() -> Text.literal("URL set to: " + url), false);
+                    return 1;
+                })));
+    }
+
+    private static LiteralArgumentBuilder<ServerCommandSource> registerSetModelCommand() {
+        return CommandManager.literal("model").then(CommandManager.literal("set").then(CommandManager.argument("model", StringArgumentType.word())
+                .requires(source -> source.hasPermissionLevel(4))
+                .executes(context -> {
+                    String model = StringArgumentType.getString(context, "model");
+                    context.getSource().sendFeedback(() -> Text.literal("Model set to: " + model), false);
+                    return 1;
+                })));
+    }
+
+    private static LiteralArgumentBuilder<ServerCommandSource> registerHelpCommand() {
+        return CommandManager.literal("help")
+                .requires(source -> source.hasPermissionLevel(4))
+                .executes(context -> {
+                    context.getSource().sendFeedback(() -> Text.literal("Usage:\n/creaturechat key set <key>\n/creaturechat url set <url>\n/creaturechat model set <model>"), false);
+                    return 1;
+                });
+    }
+}