diff --git a/libs/community/langchain_community/chat_models/naver.py b/libs/community/langchain_community/chat_models/naver.py
index 8b570265393..c54b4a0d686 100644
--- a/libs/community/langchain_community/chat_models/naver.py
+++ b/libs/community/langchain_community/chat_models/naver.py
@@ -35,7 +35,7 @@ from langchain_core.messages import (
 )
 from langchain_core.outputs import ChatGeneration, ChatGenerationChunk, ChatResult
 from langchain_core.utils import convert_to_secret_str, get_from_env
-from pydantic import AliasChoices, Field, SecretStr, model_validator
+from pydantic import AliasChoices, ConfigDict, Field, SecretStr, model_validator
 from typing_extensions import Self
 
 _DEFAULT_BASE_URL = "https://clovastudio.stream.ntruss.com"
@@ -51,6 +51,12 @@ def _convert_chunk_to_message_chunk(
     role = message.get("role")
     content = message.get("content") or ""
 
+    if sse.event == "result":
+        response_metadata = {}
+        if "stopReason" in sse_data:
+            response_metadata["stopReason"] = sse_data["stopReason"]
+        return AIMessageChunk(content="", response_metadata=response_metadata)
+
     if role == "user" or default_class == HumanMessageChunk:
         return HumanMessageChunk(content=content)
     elif role == "assistant" or default_class == AIMessageChunk:
@@ -124,8 +130,6 @@ async def _aiter_sse(
             event_data = sse.json()
             if sse.event == "signal" and event_data.get("data", {}) == "[DONE]":
                 return
-            if sse.event == "result":
-                return
             yield sse
 
 
@@ -210,10 +214,7 @@ class ChatClovaX(BaseChatModel):
     timeout: int = Field(gt=0, default=90)
     max_retries: int = Field(ge=1, default=2)
 
-    class Config:
-        """Configuration for this pydantic object."""
-
-        populate_by_name = True
+    model_config = ConfigDict(populate_by_name=True, protected_namespaces=())
 
     @property
     def _default_params(self) -> Dict[str, Any]:
@@ -286,7 +287,7 @@ class ChatClovaX(BaseChatModel):
 
         if not self.ncp_apigw_api_key:
             self.ncp_apigw_api_key = convert_to_secret_str(
-                get_from_env("ncp_apigw_api_key", "NCP_APIGW_API_KEY")
+                get_from_env("ncp_apigw_api_key", "NCP_APIGW_API_KEY", "")
             )
 
         if not self.base_url:
@@ -311,22 +312,28 @@ class ChatClovaX(BaseChatModel):
         return self
 
     def default_headers(self) -> Dict[str, Any]:
+        headers = {
+            "Content-Type": "application/json",
+            "Accept": "application/json",
+        }
+
         clovastudio_api_key = (
             self.ncp_clovastudio_api_key.get_secret_value()
             if self.ncp_clovastudio_api_key
             else None
         )
+        if clovastudio_api_key:
+            headers["X-NCP-CLOVASTUDIO-API-KEY"] = clovastudio_api_key
+
         apigw_api_key = (
             self.ncp_apigw_api_key.get_secret_value()
             if self.ncp_apigw_api_key
             else None
         )
-        return {
-            "Content-Type": "application/json",
-            "Accept": "application/json",
-            "X-NCP-CLOVASTUDIO-API-KEY": clovastudio_api_key,
-            "X-NCP-APIGW-API-KEY": apigw_api_key,
-        }
+        if apigw_api_key:
+            headers["X-NCP-APIGW-API-KEY"] = apigw_api_key
+
+        return headers
 
     def _create_message_dicts(
         self, messages: List[BaseMessage], stop: Optional[List[str]]
@@ -363,8 +370,6 @@ class ChatClovaX(BaseChatModel):
                             and event_data.get("data", {}) == "[DONE]"
                         ):
                             return
-                        if sse.event == "result":
-                            return
                         if sse.event == "error":
                             raise SSEError(message=sse.data)
                         yield sse
diff --git a/libs/community/langchain_community/embeddings/naver.py b/libs/community/langchain_community/embeddings/naver.py
index af7003c70c2..9b111a841bb 100644
--- a/libs/community/langchain_community/embeddings/naver.py
+++ b/libs/community/langchain_community/embeddings/naver.py
@@ -7,6 +7,7 @@ from langchain_core.utils import convert_to_secret_str, get_from_env
 from pydantic import (
     AliasChoices,
     BaseModel,
+    ConfigDict,
     Field,
     SecretStr,
     model_validator,
@@ -86,8 +87,7 @@ class ClovaXEmbeddings(BaseModel, Embeddings):
 
     timeout: int = Field(gt=0, default=60)
 
-    class Config:
-        arbitrary_types_allowed = True
+    model_config = ConfigDict(arbitrary_types_allowed=True, protected_namespaces=())
 
     @property
     def lc_secrets(self) -> Dict[str, str]:
@@ -115,7 +115,7 @@ class ClovaXEmbeddings(BaseModel, Embeddings):
 
         if not self.ncp_apigw_api_key:
             self.ncp_apigw_api_key = convert_to_secret_str(
-                get_from_env("ncp_apigw_api_key", "NCP_APIGW_API_KEY")
+                get_from_env("ncp_apigw_api_key", "NCP_APIGW_API_KEY", "")
             )
 
         if not self.base_url:
@@ -143,22 +143,28 @@ class ClovaXEmbeddings(BaseModel, Embeddings):
         return self
 
     def default_headers(self) -> Dict[str, Any]:
+        headers = {
+            "Content-Type": "application/json",
+            "Accept": "application/json",
+        }
+
         clovastudio_api_key = (
             self.ncp_clovastudio_api_key.get_secret_value()
             if self.ncp_clovastudio_api_key
             else None
         )
+        if clovastudio_api_key:
+            headers["X-NCP-CLOVASTUDIO-API-KEY"] = clovastudio_api_key
+
         apigw_api_key = (
             self.ncp_apigw_api_key.get_secret_value()
             if self.ncp_apigw_api_key
             else None
         )
-        return {
-            "Content-Type": "application/json",
-            "Accept": "application/json",
-            "X-NCP-CLOVASTUDIO-API-KEY": clovastudio_api_key,
-            "X-NCP-APIGW-API-KEY": apigw_api_key,
-        }
+        if apigw_api_key:
+            headers["X-NCP-APIGW-API-KEY"] = apigw_api_key
+
+        return headers
 
     def _embed_text(self, text: str) -> List[float]:
         payload = {"text": text}