diff --git a/sandbox/ConsoleApp/Program.cs b/sandbox/ConsoleApp/Program.cs
index f3850d5..c4e901f 100644
--- a/sandbox/ConsoleApp/Program.cs
+++ b/sandbox/ConsoleApp/Program.cs
@@ -22,6 +22,9 @@
 // create connection(default, connect to nats://localhost:4222)
 
 
+// var conn = new NatsConnectionPool(1).GetConnection();
+
+
 await using var conn = new NatsConnection();
 conn.OnConnectingAsync = async x =>
 {
@@ -33,6 +36,7 @@
 
 
 
+
 // Server
 await conn.SubscribeRequestAsync("foobar", (int x) => $"Hello {x}");
 
diff --git a/src/AlterNats.Hosting/NatsHostingExtensions.cs b/src/AlterNats.Hosting/NatsHostingExtensions.cs
index 1fda662..d691ed6 100644
--- a/src/AlterNats.Hosting/NatsHostingExtensions.cs
+++ b/src/AlterNats.Hosting/NatsHostingExtensions.cs
@@ -10,7 +10,7 @@ public static class NatsHostingExtensions
     /// Add NatsConnection/Pool to ServiceCollection. When poolSize = 1, registered `NatsConnection` and `INatsCommand` as singleton.
     /// Others, registered `NatsConnectionPool` as singleton, `NatsConnection` and `INatsCommand` as transient(get from pool).
     /// </summary>
-    public static IServiceCollection AddNats(this IServiceCollection services, int poolSize = 1, Func<NatsOptions, NatsOptions>? configureOptions = null)
+    public static IServiceCollection AddNats(this IServiceCollection services, int poolSize = 1, Func<NatsOptions, NatsOptions>? configureOptions = null, Action<NatsConnection>? configureConnection = null)
     {
         poolSize = Math.Max(poolSize, 1);
 
@@ -24,7 +24,7 @@ public static IServiceCollection AddNats(this IServiceCollection services, int p
                     options = configureOptions(options);
                 }
 
-                return new NatsConnectionPool(poolSize, options);
+                return new NatsConnectionPool(poolSize, options, configureConnection ?? (_ => { }));
             });
 
             services.TryAddTransient<NatsConnection>(static provider =>
@@ -48,7 +48,12 @@ public static IServiceCollection AddNats(this IServiceCollection services, int p
                 {
                     options = configureOptions(options);
                 }
-                return new NatsConnection(options);
+                var conn = new NatsConnection(options);
+                if (configureConnection != null)
+                {
+                    configureConnection(conn);
+                }
+                return conn;
             });
 
             services.TryAddSingleton<INatsCommand>(static provider =>
@@ -63,7 +68,7 @@ public static IServiceCollection AddNats(this IServiceCollection services, int p
     /// <summary>
     /// Add Singleton NatsShardingConnection to ServiceCollection.
     /// </summary>
-    public static IServiceCollection AddNats(this IServiceCollection services, int poolSize, string[] urls, Func<NatsOptions, NatsOptions>? configureOptions = null)
+    public static IServiceCollection AddNats(this IServiceCollection services, int poolSize, string[] urls, Func<NatsOptions, NatsOptions>? configureOptions = null, Action<NatsConnection>? configureConnection = null)
     {
         services.TryAddSingleton<NatsShardingConnection>(provider =>
         {
@@ -73,7 +78,7 @@ public static IServiceCollection AddNats(this IServiceCollection services, int p
                 options = configureOptions(options);
             }
 
-            return new NatsShardingConnection(poolSize, options, urls);
+            return new NatsShardingConnection(poolSize, options, urls, configureConnection ?? (_ => { }));
         });
 
         return services;
diff --git a/src/AlterNats/NatsConnectionPool.cs b/src/AlterNats/NatsConnectionPool.cs
index e784db3..d1d4580 100644
--- a/src/AlterNats/NatsConnectionPool.cs
+++ b/src/AlterNats/NatsConnectionPool.cs
@@ -6,29 +6,36 @@ public sealed class NatsConnectionPool : IAsyncDisposable
     int index = -1;
 
     public NatsConnectionPool()
-        : this(Environment.ProcessorCount / 2, NatsOptions.Default)
+        : this(Environment.ProcessorCount / 2, NatsOptions.Default, _ => { })
     {
     }
 
     public NatsConnectionPool(int poolSize)
-        : this(poolSize, NatsOptions.Default)
+        : this(poolSize, NatsOptions.Default, _ => { })
     {
     }
 
     public NatsConnectionPool(NatsOptions options)
-        : this(Environment.ProcessorCount / 2, options)
+        : this(Environment.ProcessorCount / 2, options, _ => { })
     {
 
     }
 
     public NatsConnectionPool(int poolSize, NatsOptions options)
+        : this(poolSize, options, _ => { })
+    {
+    }
+
+    public NatsConnectionPool(int poolSize, NatsOptions options, Action<NatsConnection> configureConnection)
     {
         poolSize = Math.Max(1, poolSize);
         connections = new NatsConnection[poolSize];
         for (int i = 0; i < connections.Length; i++)
         {
             var name = (options.ConnectOptions.Name == null) ? $"#{i}" : $"{options.ConnectOptions.Name}#{i}";
-            connections[i] = new NatsConnection(options with { ConnectOptions = options.ConnectOptions with { Name = name } });
+            var conn = new NatsConnection(options with { ConnectOptions = options.ConnectOptions with { Name = name } });
+            configureConnection(conn);
+            connections[i] = conn;
         }
     }
 
diff --git a/src/AlterNats/NatsShardingConnection.cs b/src/AlterNats/NatsShardingConnection.cs
index 4eba9c9..0b85cae 100644
--- a/src/AlterNats/NatsShardingConnection.cs
+++ b/src/AlterNats/NatsShardingConnection.cs
@@ -9,12 +9,17 @@ public sealed class NatsShardingConnection : IAsyncDisposable
     readonly NatsConnectionPool[] pools;
 
     public NatsShardingConnection(int poolSize, NatsOptions options, string[] urls)
+        : this(poolSize, options, urls, _ => { })
+    {
+    }
+
+    public NatsShardingConnection(int poolSize, NatsOptions options, string[] urls, Action<NatsConnection> configureConnection)
     {
         poolSize = Math.Max(1, poolSize);
         pools = new NatsConnectionPool[urls.Length];
         for (int i = 0; i < urls.Length; i++)
         {
-            pools[i] = new NatsConnectionPool(poolSize, options with { Url = urls[i] });
+            pools[i] = new NatsConnectionPool(poolSize, options with { Url = urls[i] }, configureConnection);
         }
     }