diff --git a/agentscope-core/src/main/java/io/agentscope/core/model/exception/OpenAIException.java b/agentscope-core/src/main/java/io/agentscope/core/model/exception/OpenAIException.java
index bbf4c3608..31f331678 100644
--- a/agentscope-core/src/main/java/io/agentscope/core/model/exception/OpenAIException.java
+++ b/agentscope-core/src/main/java/io/agentscope/core/model/exception/OpenAIException.java
@@ -64,7 +64,11 @@ public OpenAIException(String message, int statusCode, String errorCode, String
      * @return Appropriate exception subclass
      */
     public static OpenAIException create(
-            int statusCode, String message, String errorCode, String responseBody) {
+            Integer statusCode, String message, String errorCode, String responseBody) {
+        if (null == statusCode) {
+            // When no status code is available, the default is 418
+            statusCode = 418;
+        }
         return switch (statusCode) {
             case 400 -> new BadRequestException(message, errorCode, responseBody);
             case 401 -> new AuthenticationException(message, errorCode, responseBody);
diff --git a/agentscope-core/src/main/java/io/agentscope/core/tool/mcp/McpClientBuilder.java b/agentscope-core/src/main/java/io/agentscope/core/tool/mcp/McpClientBuilder.java
index 47dd7dcb1..2798721ba 100644
--- a/agentscope-core/src/main/java/io/agentscope/core/tool/mcp/McpClientBuilder.java
+++ b/agentscope-core/src/main/java/io/agentscope/core/tool/mcp/McpClientBuilder.java
@@ -296,7 +296,9 @@ public Mono<McpClientWrapper> buildAsync() {
 
                     McpSchema.Implementation clientInfo =
                             new McpSchema.Implementation(
-                                    "agentscope-java", "AgentScope Java Framework", "1.0.10-SNAPSHOT");
+                                    "agentscope-java",
+                                    "AgentScope Java Framework",
+                                    "1.0.10-SNAPSHOT");
 
                     McpSchema.ClientCapabilities clientCapabilities =
                             McpSchema.ClientCapabilities.builder().build();
diff --git a/agentscope-core/src/test/java/io/agentscope/core/VersionTest.java b/agentscope-core/src/test/java/io/agentscope/core/VersionTest.java
index a2a4921dd..67cb43be3 100644
--- a/agentscope-core/src/test/java/io/agentscope/core/VersionTest.java
+++ b/agentscope-core/src/test/java/io/agentscope/core/VersionTest.java
@@ -30,7 +30,8 @@ void testVersionConstant() {
         // Verify version constant is set
         Assertions.assertNotNull(Version.VERSION, "VERSION constant should not be null");
         Assertions.assertFalse(Version.VERSION.isEmpty(), "VERSION constant should not be empty");
-        Assertions.assertEquals("1.0.10-SNAPSHOT", Version.VERSION, "VERSION should match current version");
+        Assertions.assertEquals(
+                "1.0.10-SNAPSHOT", Version.VERSION, "VERSION should match current version");
     }
 
     @Test
diff --git a/agentscope-core/src/test/java/io/agentscope/core/model/OpenAIClientTest.java b/agentscope-core/src/test/java/io/agentscope/core/model/OpenAIClientTest.java
index 123db2566..97b2110d1 100644
--- a/agentscope-core/src/test/java/io/agentscope/core/model/OpenAIClientTest.java
+++ b/agentscope-core/src/test/java/io/agentscope/core/model/OpenAIClientTest.java
@@ -882,4 +882,35 @@ void testCustomEndpointPathInStreamCall() throws Exception {
                 recordedRequest.getPath().contains("/v4/chat/completions"),
                 "Stream path should contain custom endpoint path: " + recordedRequest.getPath());
     }
+
+    @Test
+    @DisplayName("Should throw OpenAIException when handle custom endpoint path in stream call")
+    void testThrowOpenAIExceptionWhenCustomEndpointPathInStreamCall() {
+        String sseResponse = "";
+
+        mockServer.enqueue(
+                new MockResponse()
+                        .setBody(sseResponse)
+                        .setResponseCode(301)
+                        .setHeader("Content-Type", "text/event-stream"));
+
+        OpenAIRequest request =
+                OpenAIRequest.builder()
+                        .model("gpt-4")
+                        .messages(
+                                List.of(
+                                        OpenAIMessage.builder()
+                                                .role("user")
+                                                .content("Hello")
+                                                .build()))
+                        .build();
+
+        // Use custom endpoint path for stream call
+        GenerateOptions options =
+                GenerateOptions.builder().endpointPath("/v4/chat/completions").build();
+
+        assertThrows(
+                OpenAIException.class,
+                () -> client.stream(TEST_API_KEY, baseUrl, request, options).collectList().block());
+    }
 }