diff --git a/NineChronicles.Headless.Executable/Commands/GraphQLCommand.cs b/NineChronicles.Headless.Executable/Commands/GraphQLCommand.cs
new file mode 100644
index 000000000..dee14b357
--- /dev/null
+++ b/NineChronicles.Headless.Executable/Commands/GraphQLCommand.cs
@@ -0,0 +1,81 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using GraphQL.Server;
+using GraphQL.Utilities;
+using Lib9c.Renderers;
+using Libplanet.Action.State;
+using Libplanet.Blockchain;
+using Libplanet.Blockchain.Policies;
+using Libplanet.Crypto;
+using Libplanet.Headless.Hosting;
+using Libplanet.Net;
+using Libplanet.Store;
+using Libplanet.Store.Trie;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Nekoyume;
+using Nekoyume.Action.Loader;
+using NineChronicles.Headless.GraphTypes;
+
+namespace NineChronicles.Headless.Executable.Commands;
+
+public class GraphQLCommand
+{
+    [Cocona.Command]
+    public void Schema()
+    {
+        var serviceCollection = new ServiceCollection();
+        
+        serviceCollection.AddSingleton<StateMemoryCache>();
+        serviceCollection.AddSingleton<IConfiguration>(new ConfigurationBuilder().Build());
+        serviceCollection.AddSingleton<BlockRenderer>();
+        serviceCollection.AddSingleton<ActionRenderer>();
+        serviceCollection.AddSingleton<ExceptionRenderer>();
+        serviceCollection.AddSingleton<NodeStatusRenderer>();
+        serviceCollection.AddSingleton<IBlockChainStates>(
+            new BlockChainStates(
+                new MemoryStore(),
+                new TrieStateStore(new MemoryKeyValueStore())));
+        serviceCollection.AddSingleton<string>("STRING");  // Invalid usage but not care in this case.
+        serviceCollection.AddSingleton<RpcContext>();
+        serviceCollection.AddSingleton<ActionEvaluationPublisher>(services => new ActionEvaluationPublisher(
+            services.GetRequiredService<BlockRenderer>(),
+            services.GetRequiredService<ActionRenderer>(),
+            services.GetRequiredService<ExceptionRenderer>(),
+            services.GetRequiredService<NodeStatusRenderer>(),
+            services.GetRequiredService<IBlockChainStates>(),
+            "host",
+            0,
+            services.GetRequiredService<RpcContext>(),
+            services.GetRequiredService<StateMemoryCache>()
+        ));
+        serviceCollection.AddSingleton(new NineChroniclesNodeService(
+            new PrivateKey(),
+            new LibplanetNodeServiceProperties
+            {
+                SwarmPrivateKey = new PrivateKey(),
+                Host = "localhost",
+                IceServers = Array.Empty<IceServer>(),
+                StorePath = Path.GetRandomFileName(),
+                GenesisBlock = BlockChain.ProposeGenesisBlock(),
+            },
+            new BlockPolicy(),
+            Planet.Heimdall,
+            new NCActionLoader()));
+        serviceCollection.AddSingleton<StandaloneContext>(services => new StandaloneContext
+        {
+            NineChroniclesNodeService = services.GetRequiredService<NineChroniclesNodeService>(),
+        });
+
+        serviceCollection.AddGraphQL()
+            .AddLibplanetExplorer()
+            .AddGraphTypes(typeof(StandaloneSchema));
+
+        IServiceProvider serviceProvider = serviceCollection.BuildServiceProvider();
+        var schema = new StandaloneSchema(serviceProvider);
+        var printer = new SchemaPrinter(schema);
+
+        Console.WriteLine(printer.Print());
+    }
+}
diff --git a/NineChronicles.Headless.Executable/Program.cs b/NineChronicles.Headless.Executable/Program.cs
index 125cd02aa..7c19f7010 100644
--- a/NineChronicles.Headless.Executable/Program.cs
+++ b/NineChronicles.Headless.Executable/Program.cs
@@ -57,6 +57,7 @@ namespace NineChronicles.Headless.Executable
     [HasSubCommands(typeof(MarketCommand), "market")]
     [HasSubCommands(typeof(GenesisCommand), "genesis")]
     [HasSubCommands(typeof(ReplayCommand), "replay")]
+    [HasSubCommands(typeof(GraphQLCommand), "graphql")]
     public class Program : CoconaLiteConsoleAppBase
     {
         static async Task Main(string[] args)
diff --git a/NineChronicles.Headless/GraphTypes/StandaloneSubscription.cs b/NineChronicles.Headless/GraphTypes/StandaloneSubscription.cs
index af0600912..4ab19cf5b 100644
--- a/NineChronicles.Headless/GraphTypes/StandaloneSubscription.cs
+++ b/NineChronicles.Headless/GraphTypes/StandaloneSubscription.cs
@@ -114,7 +114,7 @@ public StandaloneSubscription(StandaloneContext standaloneContext, IConfiguratio
         {
             StandaloneContext = standaloneContext;
             Configuration = configuration;
-            if (Convert.ToBoolean(configuration.GetSection("Jwt")["EnableJwtAuthentication"]))
+            if (configuration.GetSection("Jwt")["EnableJwtAuthentication"] is { } enableJwtAuthentication && Convert.ToBoolean(enableJwtAuthentication))
             {
                 this.AuthorizeWith(GraphQLService.JwtPolicyKey);
             }