diff --git a/hamilton/graph_types.py b/hamilton/graph_types.py
index f61336fe7..f6f060fd5 100644
--- a/hamilton/graph_types.py
+++ b/hamilton/graph_types.py
@@ -100,20 +100,20 @@ class HamiltonNode:
     documentation: typing.Optional[str]
     required_dependencies: typing.Set[str]
     optional_dependencies: typing.Set[str]
-    optional_input_values: typing.Dict[str, typing.Any]
+    optional_dependencies_default_values: typing.Dict[str, typing.Any]
 
-    def as_dict(self):
+    def as_dict(self, include_optional_dependencies_default_values: bool = False) -> dict:
         """Create a dictionary representation of the Node that is JSON serializable.
 
-        Note: optional values could be anything and might not be JSON serializable.
+        :param include_optional_dependencies_default_values: Include optional dependencies default values in the output.
+            Note: optional values could be anything and might not be JSON serializable.
         """
-        return {
+        dict_representation = {
             "name": self.name,
             "tags": self.tags,
             "output_type": (get_type_as_string(self.type) if get_type_as_string(self.type) else ""),
             "required_dependencies": sorted(self.required_dependencies),
             "optional_dependencies": sorted(self.optional_dependencies),
-            "optional_input_values": self.optional_input_values,
             "source": (
                 inspect.getsource(self.originating_functions[0])
                 if self.originating_functions
@@ -122,6 +122,11 @@ def as_dict(self):
             "documentation": self.documentation,
             "version": self.version,
         }
+        if include_optional_dependencies_default_values:
+            dict_representation["optional_dependencies_default_values"] = (
+                self.optional_dependencies_default_values
+            )
+        return dict_representation
 
     @staticmethod
     def from_node(n: node.Node) -> "HamiltonNode":
@@ -147,7 +152,9 @@ def from_node(n: node.Node) -> "HamiltonNode":
                 for dep, (type_, dep_type) in n.input_types.items()
                 if dep_type == node.DependencyType.OPTIONAL
             },
-            optional_input_values={name: value for name, value in n.default_input_values.items()},
+            optional_dependencies_default_values={
+                name: value for name, value in n.default_parameter_values.items()
+            },
         )
 
     @functools.cached_property
diff --git a/hamilton/node.py b/hamilton/node.py
index 779bde460..b875ee6b9 100644
--- a/hamilton/node.py
+++ b/hamilton/node.py
@@ -148,8 +148,8 @@ def input_types(self) -> Dict[Any, Tuple[Any, DependencyType]]:
         return self._input_types
 
     @property
-    def default_input_values(self) -> Dict[str, Any]:
-        """Only returns keys for which we have optional values."""
+    def default_parameter_values(self) -> Dict[str, Any]:
+        """Only returns parameters for which we have optional values."""
         return self._default_parameter_values
 
     def requires(self, dependency: str) -> bool:
@@ -322,7 +322,9 @@ def copy_with(self, include_refs: bool = True, **overrides) -> "Node":
             input_types=self.input_types.copy(),
             tags=self.tags.copy(),
             originating_functions=self.originating_functions,
-            optional_values=self.default_input_values.copy() if self.default_input_values else {},
+            optional_values=self.default_parameter_values.copy()
+            if self.default_parameter_values
+            else {},
         )
         constructor_args.update(**overrides)
         out = Node(**constructor_args)
diff --git a/tests/plugins/test_h_schema.py b/tests/plugins/test_h_schema.py
index 1726c6dd2..c44831c98 100644
--- a/tests/plugins/test_h_schema.py
+++ b/tests/plugins/test_h_schema.py
@@ -245,7 +245,7 @@ def foo(x: pd.DataFrame) -> pd.DataFrame:
         originating_functions=(foo,),
         required_dependencies=set(),
         optional_dependencies=set(),
-        optional_input_values={},
+        optional_dependencies_default_values={},
     )
     df = pd.DataFrame({"a": [0, 1], "b": [True, False]})
 
@@ -281,7 +281,7 @@ def foo(x: pd.DataFrame) -> pd.DataFrame:
         originating_functions=(foo,),
         required_dependencies=set(),
         optional_dependencies=set(),
-        optional_input_values={},
+        optional_dependencies_default_values={},
     )
     h_graph = graph_types.HamiltonGraph([node])
     df = pd.DataFrame({"a": [0, 1], "b": [True, False]})