diff --git a/agents-flex-core/src/main/java/com/agentsflex/core/llm/client/OkHttpClientUtil.java b/agents-flex-core/src/main/java/com/agentsflex/core/llm/client/OkHttpClientUtil.java
new file mode 100644
index 0000000..736e539
--- /dev/null
+++ b/agents-flex-core/src/main/java/com/agentsflex/core/llm/client/OkHttpClientUtil.java
@@ -0,0 +1,56 @@
+/*
+ *  Copyright (c) 2023-2025, Agents-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package com.agentsflex.core.llm.client;
+
+import com.agentsflex.core.util.StringUtil;
+import okhttp3.OkHttpClient;
+
+import java.net.InetSocketAddress;
+import java.net.Proxy;
+import java.util.concurrent.TimeUnit;
+
+public class OkHttpClientUtil {
+
+    private static OkHttpClient.Builder okHttpClientBuilder;
+
+    public static OkHttpClient.Builder getOkHttpClientBuilder() {
+        return okHttpClientBuilder;
+    }
+
+    public static void setOkHttpClientBuilder(OkHttpClient.Builder okHttpClientBuilder) {
+        OkHttpClientUtil.okHttpClientBuilder = okHttpClientBuilder;
+    }
+
+    public static OkHttpClient buildDefaultClient() {
+        if (okHttpClientBuilder != null) {
+            return okHttpClientBuilder.build();
+        }
+
+        OkHttpClient.Builder builder = new OkHttpClient.Builder()
+            .connectTimeout(1, TimeUnit.MINUTES)
+            .readTimeout(5, TimeUnit.MINUTES);
+
+        String proxyHost = System.getProperty("https.proxyHost");
+        String proxyPort = System.getProperty("https.proxyPort");
+
+        if (StringUtil.hasText(proxyHost) && StringUtil.hasText(proxyPort)) {
+            InetSocketAddress inetSocketAddress = new InetSocketAddress(proxyHost.trim(), Integer.parseInt(proxyPort.trim()));
+            builder.proxy(new Proxy(Proxy.Type.HTTP, inetSocketAddress));
+        }
+
+        return builder.build();
+    }
+}