diff --git a/llama_stack/core/library_client.py b/llama_stack/core/library_client.py
index e722e4de6..0d9f9f134 100644
--- a/llama_stack/core/library_client.py
+++ b/llama_stack/core/library_client.py
@@ -374,6 +374,10 @@ class AsyncLlamaStackAsLibraryClient(AsyncLlamaStackClient):
         body = options.params or {}
         body |= options.json_data or {}
 
+        # Merge extra_json parameters (extra_body from SDK is converted to extra_json)
+        if hasattr(options, "extra_json") and options.extra_json:
+            body |= options.extra_json
+
         matched_func, path_params, route_path, webmethod = find_matching_route(options.method, path, self.route_impls)
         body |= path_params
 
diff --git a/llama_stack/providers/inline/agents/meta_reference/agents.py b/llama_stack/providers/inline/agents/meta_reference/agents.py
index 8bdde86b0..5431e8f28 100644
--- a/llama_stack/providers/inline/agents/meta_reference/agents.py
+++ b/llama_stack/providers/inline/agents/meta_reference/agents.py
@@ -329,6 +329,7 @@ class MetaReferenceAgentsImpl(Agents):
         tools: list[OpenAIResponseInputTool] | None = None,
         include: list[str] | None = None,
         max_infer_iters: int | None = 10,
+        shields: list | None = None,
     ) -> OpenAIResponseObject:
         return await self.openai_responses_impl.create_openai_response(
             input,
@@ -342,6 +343,7 @@ class MetaReferenceAgentsImpl(Agents):
             tools,
             include,
             max_infer_iters,
+            shields,
         )
 
     async def list_openai_responses(
diff --git a/llama_stack/providers/inline/agents/meta_reference/responses/openai_responses.py b/llama_stack/providers/inline/agents/meta_reference/responses/openai_responses.py
index 352be3ded..8ccdcb0e1 100644
--- a/llama_stack/providers/inline/agents/meta_reference/responses/openai_responses.py
+++ b/llama_stack/providers/inline/agents/meta_reference/responses/openai_responses.py
@@ -208,10 +208,15 @@ class OpenAIResponsesImpl:
         tools: list[OpenAIResponseInputTool] | None = None,
         include: list[str] | None = None,
         max_infer_iters: int | None = 10,
+        shields: list | None = None,
     ):
         stream = bool(stream)
         text = OpenAIResponseText(format=OpenAIResponseTextFormat(type="text")) if text is None else text
 
+        # Shields parameter received via extra_body - not yet implemented
+        if shields is not None:
+            raise NotImplementedError("Shields parameter is not yet implemented in the meta-reference provider")
+
         stream_gen = self._create_streaming_response(
             input=input,
             model=model,
diff --git a/tests/integration/responses/test_extra_body_shields.py b/tests/integration/responses/test_extra_body_shields.py
new file mode 100644
index 000000000..b0c6ec39a
--- /dev/null
+++ b/tests/integration/responses/test_extra_body_shields.py
@@ -0,0 +1,83 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+
+"""
+Test for extra_body parameter support with shields example.
+
+This test demonstrates that parameters marked with ExtraBodyField annotation
+can be passed via extra_body in the client SDK and are received by the
+server-side implementation.
+"""
+
+import pytest
+from llama_stack_client import APIStatusError
+
+
+def test_shields_via_extra_body(compat_client, text_model_id):
+    """Test that shields parameter is received by the server and raises NotImplementedError."""
+
+    # Test with shields as list of strings (shield IDs)
+    with pytest.raises((APIStatusError, NotImplementedError)) as exc_info:
+        compat_client.responses.create(
+            model=text_model_id,
+            input="What is the capital of France?",
+            stream=False,
+            extra_body={
+                "shields": ["test-shield-1", "test-shield-2"]
+            }
+        )
+
+    # Verify the error message indicates shields are not implemented
+    error_message = str(exc_info.value)
+    assert "not yet implemented" in error_message.lower() or "not implemented" in error_message.lower()
+
+
+
+
+def test_response_without_shields_still_works(compat_client, text_model_id):
+    """Test that responses still work without shields parameter (backwards compatibility)."""
+
+    response = compat_client.responses.create(
+        model=text_model_id,
+        input="Hello, world!",
+        stream=False,
+    )
+
+    # Verify response was created successfully
+    assert response.id is not None
+    assert response.output_text is not None
+    assert len(response.output_text) > 0
+
+
+def test_shields_parameter_received_end_to_end(compat_client, text_model_id):
+    """
+    Test that shields parameter passed via extra_body reaches the server implementation.
+
+    This verifies end-to-end that:
+    1. The parameter can be passed via extra_body in the client SDK
+    2. The parameter is properly routed through the API layers
+    3. The server-side implementation receives the parameter (verified by NotImplementedError)
+
+    The NotImplementedError proves the extra_body parameter reached the implementation,
+    as opposed to being rejected earlier due to signature mismatch or validation errors.
+    """
+    # Test with shields parameter via extra_body
+    with pytest.raises((APIStatusError, NotImplementedError)) as exc_info:
+        compat_client.responses.create(
+            model=text_model_id,
+            input="Test message for shields verification",
+            stream=False,
+            extra_body={
+                "shields": ["shield-1", "shield-2"]
+            }
+        )
+
+    # The NotImplementedError proves that:
+    # 1. extra_body.shields was parsed and passed to the API
+    # 2. The server-side implementation received the shields parameter
+    # 3. No signature mismatch or validation errors occurred
+    error_message = str(exc_info.value)
+    assert "not yet implemented" in error_message.lower() or "not implemented" in error_message.lower()