diff --git a/litellm/__init__.py b/litellm/__init__.py
index f9e710609..43ea2d250 100644
--- a/litellm/__init__.py
+++ b/litellm/__init__.py
@@ -16,7 +16,7 @@ from litellm._logging import (
     log_level,
 )
 
-
+from litellm.types.guardrails import GuardrailItem
 from litellm.proxy._types import (
     KeyManagementSystem,
     KeyManagementSettings,
@@ -124,6 +124,7 @@ llamaguard_unsafe_content_categories: Optional[str] = None
 blocked_user_list: Optional[Union[str, List]] = None
 banned_keywords_list: Optional[Union[str, List]] = None
 llm_guard_mode: Literal["all", "key-specific", "request-specific"] = "all"
+guardrail_name_config_map: Optional[Dict[str, GuardrailItem]] = None
 ##################
 ### PREVIEW FEATURES ###
 enable_preview_features: bool = False
diff --git a/litellm/integrations/custom_logger.py b/litellm/integrations/custom_logger.py
index da9826b9b..a33803505 100644
--- a/litellm/integrations/custom_logger.py
+++ b/litellm/integrations/custom_logger.py
@@ -2,7 +2,7 @@
 #    On success, logs events to Promptlayer
 import os
 import traceback
-from typing import Literal, Optional, Union
+from typing import Any, Literal, Optional, Tuple, Union
 
 import dotenv
 
@@ -90,6 +90,16 @@ class CustomLogger:  # https://docs.litellm.ai/docs/observability/custom_callbac
     ):
         pass
 
+    async def async_logging_hook(self):
+        """For masking logged request/response"""
+        pass
+
+    def logging_hook(
+        self, kwargs: dict, result: Any, call_type: str
+    ) -> Tuple[dict, Any]:
+        """For masking logged request/response. Return a modified version of the request/result."""
+        return kwargs, result
+
     async def async_moderation_hook(
         self,
         data: dict,
diff --git a/litellm/litellm_core_utils/litellm_logging.py b/litellm/litellm_core_utils/litellm_logging.py
index 0271c5714..fde907ffe 100644
--- a/litellm/litellm_core_utils/litellm_logging.py
+++ b/litellm/litellm_core_utils/litellm_logging.py
@@ -655,6 +655,16 @@ class Logging:
                 result=result, litellm_logging_obj=self
             )
 
+            ## LOGGING HOOK ##
+
+            for callback in callbacks:
+                if isinstance(callback, CustomLogger):
+                    self.model_call_details["input"], result = callback.logging_hook(
+                        kwargs=self.model_call_details,
+                        result=result,
+                        call_type=self.call_type,
+                    )
+
             for callback in callbacks:
                 try:
                     litellm_params = self.model_call_details.get("litellm_params", {})
diff --git a/litellm/proxy/guardrails/init_guardrails.py b/litellm/proxy/guardrails/init_guardrails.py
index 9c9fde533..d171d5b91 100644
--- a/litellm/proxy/guardrails/init_guardrails.py
+++ b/litellm/proxy/guardrails/init_guardrails.py
@@ -18,7 +18,7 @@ def initialize_guardrails(
     premium_user: bool,
     config_file_path: str,
     litellm_settings: dict,
-):
+) -> Dict[str, GuardrailItem]:
     try:
         verbose_proxy_logger.debug(f"validating  guardrails passed {guardrails_config}")
         global all_guardrails
@@ -55,7 +55,11 @@ def initialize_guardrails(
                 litellm_settings=litellm_settings,
             )
 
+        return guardrail_name_config_map
     except Exception as e:
-        verbose_proxy_logger.error(f"error initializing guardrails {str(e)}")
-        traceback.print_exc()
+        verbose_proxy_logger.error(
+            "error initializing guardrails {}\n{}".format(
+                str(e), traceback.format_exc()
+            )
+        )
         raise e
diff --git a/litellm/proxy/proxy_server.py b/litellm/proxy/proxy_server.py
index 69f63d985..193b27e12 100644
--- a/litellm/proxy/proxy_server.py
+++ b/litellm/proxy/proxy_server.py
@@ -1467,12 +1467,14 @@ class ProxyConfig:
                             + CommonProxyErrors.not_premium_user.value
                         )
 
-                    initialize_guardrails(
+                    guardrail_name_config_map = initialize_guardrails(
                         guardrails_config=value,
                         premium_user=premium_user,
                         config_file_path=config_file_path,
                         litellm_settings=litellm_settings,
                     )
+
+                    litellm.guardrail_name_config_map = guardrail_name_config_map
                 elif key == "callbacks":
 
                     initialize_callbacks_on_proxy(
diff --git a/litellm/tests/test_guardrails_config.py b/litellm/tests/test_guardrails_config.py
new file mode 100644
index 000000000..a086c8081
--- /dev/null
+++ b/litellm/tests/test_guardrails_config.py
@@ -0,0 +1,73 @@
+# What is this?
+## Unit Tests for guardrails config
+import asyncio
+import inspect
+import os
+import sys
+import time
+import traceback
+import uuid
+from datetime import datetime
+
+import pytest
+from pydantic import BaseModel
+
+import litellm.litellm_core_utils
+import litellm.litellm_core_utils.litellm_logging
+
+sys.path.insert(0, os.path.abspath("../.."))
+from typing import Any, List, Literal, Optional, Tuple, Union
+from unittest.mock import AsyncMock, MagicMock, patch
+
+import litellm
+from litellm import Cache, completion, embedding
+from litellm.integrations.custom_logger import CustomLogger
+from litellm.types.utils import LiteLLMCommonStrings
+
+
+class CustomLoggingIntegration(CustomLogger):
+    def __init__(self) -> None:
+        super().__init__()
+
+    def logging_hook(
+        self, kwargs: dict, result: Any, call_type: str
+    ) -> Tuple[dict, Any]:
+        input: Optional[Any] = kwargs.get("input", None)
+        messages: Optional[List] = kwargs.get("messages", None)
+        if call_type == "completion":
+            # assume input is of type messages
+            if input is not None and isinstance(input, list):
+                input[0]["content"] = "Hey, my name is [NAME]."
+            if messages is not None and isinstance(messages, List):
+                messages[0]["content"] = "Hey, my name is [NAME]."
+
+            kwargs["input"] = input
+            kwargs["messages"] = messages
+        return kwargs, result
+
+
+def test_guardrail_masking_logging_only():
+    """
+    Assert response is unmasked.
+
+    Assert logged response is masked.
+    """
+    callback = CustomLoggingIntegration()
+
+    with patch.object(callback, "log_success_event", new=MagicMock()) as mock_call:
+        litellm.callbacks = [callback]
+        messages = [{"role": "user", "content": "Hey, my name is Peter."}]
+        response = completion(
+            model="gpt-3.5-turbo", messages=messages, mock_response="Hi Peter!"
+        )
+
+        assert response.choices[0].message.content == "Hi Peter!"  # type: ignore
+
+        mock_call.assert_called_once()
+
+        print(mock_call.call_args.kwargs["kwargs"]["messages"][0]["content"])
+
+        assert (
+            mock_call.call_args.kwargs["kwargs"]["messages"][0]["content"]
+            == "Hey, my name is [NAME]."
+        )
diff --git a/litellm/types/guardrails.py b/litellm/types/guardrails.py
index 7dd06a79b..3ef20aa47 100644
--- a/litellm/types/guardrails.py
+++ b/litellm/types/guardrails.py
@@ -19,4 +19,5 @@ litellm_settings:
 class GuardrailItem(BaseModel):
     callbacks: List[str]
     default_on: bool
+    logging_only: bool
     guardrail_name: str