[Fix] 404 Not Found on /api/event_logging/batch endpoint (#20504)

* fix typing

* add event_logging_batch

* TestEventLoggingBatchEndpoint

litellm/proxy/anthropic_endpoints/endpoints.py

@@ -80,6 +80,7 @@ async def anthropic_response(  # noqa: PLR0915
 
         # Create Anthropic-formatted response with violation message
         import uuid
+
         from litellm.types.utils import AnthropicMessagesResponse
 
         _anthropic_response = AnthropicMessagesResponse(
@@ -240,3 +241,19 @@ async def count_tokens(
         raise HTTPException(
             status_code=500, detail={"error": f"Internal server error: {str(e)}"}
         )
+
+
+@router.post(
+    "/api/event_logging/batch",
+    tags=["[beta] Anthropic Event Logging"],
+)
+async def event_logging_batch(
+    request: Request,
+):
+    """
+    Stubbed endpoint for Anthropic event logging batch requests.
+    
+    This endpoint accepts event logging requests but does nothing with them.
+    It exists to prevent 404 errors from Claude Code clients that send telemetry.
+    """
+    return {"status": "ok"}

tests/test_litellm/proxy/anthropic_endpoints/test_endpoints.py

@@ -7,6 +7,7 @@ import unittest
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
+from fastapi.testclient import TestClient
 
 from litellm.proxy.common_request_processing import ProxyBaseLLMRequestProcessing
 
@@ -66,3 +67,22 @@ class TestAnthropicEndpoints(unittest.TestCase):
         assert (
             mock_safe_dumps.call_count == 2
         )  # Called twice, once for each dict object
+
+
+class TestEventLoggingBatchEndpoint:
+    """Test the stubbed event logging batch endpoint"""
+
+    def test_event_logging_batch_endpoint_exists(self):
+        """Test that the event_logging_batch endpoint exists and returns 200"""
+        from fastapi import FastAPI
+
+        from litellm.proxy.anthropic_endpoints.endpoints import router
+
+        app = FastAPI()
+        app.include_router(router)
+
+        client = TestClient(app)
+        response = client.post("/api/event_logging/batch", json={"events": []})
+
+        assert response.status_code == 200
+        assert response.json() == {"status": "ok"}