diff --git a/litellm/proxy/_types.py b/litellm/proxy/_types.py
index 096bbc029b..babe3122fe 100644
--- a/litellm/proxy/_types.py
+++ b/litellm/proxy/_types.py
@@ -775,6 +775,7 @@ class KeyRequestBase(GenerateRequestBase):
     tags: Optional[List[str]] = None
     enforced_params: Optional[List[str]] = None
     allowed_routes: Optional[list] = []
+    allowed_passthrough_routes: Optional[list] = []
     rpm_limit_type: Optional[
         Literal["guaranteed_throughput", "best_effort_throughput"]
     ] = None  # raise an error if 'guaranteed_throughput' is set and we're overallocating rpm
@@ -1442,7 +1443,7 @@ class LiteLLM_ObjectPermissionTable(LiteLLMPydanticObjectBase):
         "1234567890": ["tool_name_1", "tool_name_2"]
     }
     """
-    
+
     vector_stores: Optional[List[str]] = []
 
 
@@ -3105,6 +3106,7 @@ LiteLLM_ManagementEndpoint_MetadataFields = [
     "enforced_params",
     "temp_budget_increase",
     "temp_budget_expiry",
+    "allowed_passthrough_routes",
 ]
 
 LiteLLM_ManagementEndpoint_MetadataFields_Premium = [
diff --git a/litellm/proxy/management_endpoints/key_management_endpoints.py b/litellm/proxy/management_endpoints/key_management_endpoints.py
index 3226ea0179..772cb42d3e 100644
--- a/litellm/proxy/management_endpoints/key_management_endpoints.py
+++ b/litellm/proxy/management_endpoints/key_management_endpoints.py
@@ -47,9 +47,9 @@ from litellm.proxy.management_endpoints.model_management_endpoints import (
     _add_model_to_db,
 )
 from litellm.proxy.management_helpers.object_permission_utils import (
+    _set_object_permission,
     attach_object_permission_to_dict,
     handle_update_object_permission_common,
-    _set_object_permission,
 )
 from litellm.proxy.management_helpers.team_member_permission_checks import (
     TeamMemberPermissionChecks,
@@ -563,6 +563,7 @@ async def _common_key_generation_helper(  # noqa: PLR0915
     data_json = data.model_dump(exclude_unset=True, exclude_none=True)  # type: ignore
 
     data_json = handle_key_type(data, data_json)
+
     # if we get max_budget passed to /key/generate, then use it as key_max_budget. Since generate_key_helper_fn is used to make new users
     if "max_budget" in data_json:
         data_json["key_max_budget"] = data_json.pop("max_budget", None)
@@ -838,6 +839,7 @@ async def generate_key_fn(
     - enforced_params: Optional[List[str]] - List of enforced params for the key (Enterprise only). [Docs](https://docs.litellm.ai/docs/proxy/enterprise#enforce-required-params-for-llm-requests)
     - prompts: Optional[List[str]] - List of prompts that the key is allowed to use.
     - allowed_routes: Optional[list] - List of allowed routes for the key. Store the actual route or store a wildcard pattern for a set of routes. Example - ["/chat/completions", "/embeddings", "/keys/*"]
+    - allowed_passthrough_routes: Optional[list] - List of allowed pass through endpoints for the key. Store the actual endpoint or store a wildcard pattern for a set of endpoints. Example - ["/my-custom-endpoint"]. Use this instead of allowed_routes, if you just want to specify which pass through endpoints the key can access, without specifying the routes. If allowed_routes is specified, allowed_pass_through_endpoints is ignored.
     - object_permission: Optional[LiteLLM_ObjectPermissionBase] - key-specific object permission. Example - {"vector_stores": ["vector_store_1", "vector_store_2"], "mcp_tool_permissions": {"server_id_1": ["tool1", "tool2"]}}. IF null or {} then no object permission.
     - key_type: Optional[str] - Type of key that determines default allowed routes. Options: "llm_api" (can call LLM API routes), "management" (can call management routes), "read_only" (can only call info/read routes), "default" (uses default allowed routes). Defaults to "default".
     - prompts: Optional[List[str]] - List of allowed prompts for the key. If specified, the key will only be able to use these specific prompts.
@@ -1114,8 +1116,6 @@ def prepare_metadata_fields(
     return non_default_values
 
 
-
-
 async def prepare_key_update_data(
     data: Union[UpdateKeyRequest, RegenerateKeyRequest],
     existing_key_row: LiteLLM_VerificationToken,
@@ -2819,6 +2819,7 @@ async def list_keys(
             code=status.HTTP_500_INTERNAL_SERVER_ERROR,
         )
 
+
 @router.get(
     "/key/aliases",
     tags=["key management"],