diff --git a/instill/helpers/__init__.py b/instill/helpers/__init__.py
index e69de29..496028f 100644
--- a/instill/helpers/__init__.py
+++ b/instill/helpers/__init__.py
@@ -0,0 +1,5 @@
+from instill.helpers.protobufs.parse import (
+    Metadata,
+    construct_infer_response,
+    construct_metadata_response,
+)
diff --git a/instill/helpers/protobufs/__init__.py b/instill/helpers/protobufs/__init__.py
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/instill/helpers/protobufs/__init__.py
@@ -0,0 +1 @@
+
diff --git a/instill/helpers/protobufs/parse.py b/instill/helpers/protobufs/parse.py
new file mode 100644
index 0000000..8838d0e
--- /dev/null
+++ b/instill/helpers/protobufs/parse.py
@@ -0,0 +1,77 @@
+from dataclasses import dataclass
+from typing import List
+
+from instill.helpers.protobufs.ray_pb2 import (
+    ModelMetadataRequest,
+    ModelMetadataResponse,
+    RayServiceCallRequest,
+    RayServiceCallResponse,
+    InferTensor,
+)
+
+
+@dataclass
+class Metadata:
+    name: str
+    datatype: str
+    shape: list
+
+
+def construct_metadata_response(
+    req: ModelMetadataRequest,
+    inputs: List[Metadata],
+    outputs: List[Metadata],
+) -> ModelMetadataResponse:
+    resp = ModelMetadataResponse(
+        name=req.name,
+        versions=req.version,
+        framework="python",
+        inputs=[],
+        outputs=[],
+    )
+
+    for i in inputs:
+        resp.inputs.append(
+            ModelMetadataResponse.TensorMetadata(
+                name=i.name,
+                datatype=i.datatype,
+                shape=i.shape,
+            )
+        )
+
+    for o in outputs:
+        resp.outputs.append(
+            ModelMetadataResponse.TensorMetadata(
+                name=o.name,
+                datatype=o.datatype,
+                shape=o.shape,
+            )
+        )
+
+    return resp
+
+
+def construct_infer_response(
+    req: RayServiceCallRequest,
+    outputs: List[Metadata],
+    raw_outputs,
+) -> RayServiceCallResponse:
+    resp = RayServiceCallResponse(
+        model_name=req.model_name,
+        model_version=req.model_version,
+        outputs=[],
+        raw_output_contents=[],
+    )
+
+    for o in outputs:
+        resp.outputs.append(
+            InferTensor(
+                name=o.name,
+                datatype=o.datatype,
+                shape=o.shape,
+            )
+        )
+
+    resp.raw_output_contents.append(raw_outputs)
+
+    return resp