fix(pass-through): Normalize Bedrock agent runtime routes to not require trailing slashes

litellm/constants.py

@@ -1197,13 +1197,13 @@ PYTHON_GC_THRESHOLD = os.getenv("PYTHON_GC_THRESHOLD")
 
 # pass through route constansts
 BEDROCK_AGENT_RUNTIME_PASS_THROUGH_ROUTES = [
-    "agents/",
-    "knowledgebases/",
-    "flows/",
-    "retrieveAndGenerate/",
-    "rerank/",
-    "generateQuery/",
-    "optimize-prompt/",
+    "agents",
+    "knowledgebases",
+    "flows",
+    "retrieveAndGenerate",
+    "rerank",
+    "generateQuery",
+    "optimize-prompt",
 ]
 
 

litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py

@@ -1174,10 +1174,14 @@ def _resolve_vertex_model_from_router(
 
 def _is_bedrock_agent_runtime_route(endpoint: str) -> bool:
     """
-    Return True, if the endpoint should be routed to the `bedrock-agent-runtime` endpoint.
+    Return True if the endpoint should be routed to the `bedrock-agent-runtime` endpoint.
+
+    Uses normalized path segments so trailing slashes are not required.
     """
+    normalized = endpoint.strip("/")
+    parts = normalized.split("/")
     for _route in BEDROCK_AGENT_RUNTIME_PASS_THROUGH_ROUTES:
-        if _route in endpoint:
+        if _route in parts:
             return True
     return False
 

tests/pass_through_unit_tests/test_pass_through_unit_tests.py

@@ -419,6 +419,17 @@ def test_is_bedrock_agent_runtime_route():
     )
     assert _is_bedrock_agent_runtime_route("/some/random/endpoint") is False
 
+    # Test endpoints without trailing slashes still match
+    assert _is_bedrock_agent_runtime_route("agents") is True
+    assert _is_bedrock_agent_runtime_route("knowledgebases") is True
+    assert _is_bedrock_agent_runtime_route("flows") is True
+    assert _is_bedrock_agent_runtime_route("/agents") is True
+    assert _is_bedrock_agent_runtime_route("/knowledgebases/") is True
+
+    # Test that partial segment matches do NOT match (no substring false positives)
+    assert _is_bedrock_agent_runtime_route("/myagents/foo") is False
+    assert _is_bedrock_agent_runtime_route("/someflows/bar") is False
+
 
 def test_init_kwargs_filters_pricing_params(mock_request, mock_user_api_key_dict):
     """