diff --git a/python/reactivedataflow/reactivedataflow/bindings.py b/python/reactivedataflow/reactivedataflow/bindings.py
index d6976241..b2f7ba34 100644
--- a/python/reactivedataflow/reactivedataflow/bindings.py
+++ b/python/reactivedataflow/reactivedataflow/bindings.py
@@ -1,6 +1,7 @@
 # Copyright (c) 2024 Microsoft Corporation.
 """reactivedataflow PortMapper class."""
 
+from functools import cached_property
 from typing import Any
 
 from pydantic import BaseModel, Field
@@ -120,42 +121,42 @@ def bindings(self) -> list[Binding]:
         """Return the bindings."""
         return self._bindings
 
-    @property
+    @cached_property
     def config(self) -> list[Config]:
         """Return the configuration bindings."""
         return [b for b in self.bindings if isinstance(b, Config)]
 
-    @property
+    @cached_property
     def input(self) -> list[Input]:
         """Return the input bindings."""
         return [b for b in self.bindings if isinstance(b, Input)]
 
-    @property
+    @cached_property
     def outputs(self) -> list[Output]:
         """Return the output bindings."""
         return [b for b in self._bindings if isinstance(b, Output)]
 
-    @property
+    @cached_property
     def array_input(self) -> ArrayInput | None:
         """Return the array input binding."""
         return next((p for p in self._bindings if isinstance(p, ArrayInput)), None)
 
-    @property
+    @cached_property
     def named_inputs(self) -> NamedInputs | None:
         """Return the named inputs binding."""
         return next((p for p in self._bindings if isinstance(p, NamedInputs)), None)
 
-    @property
+    @cached_property
     def input_names(self) -> set[str]:
         """Return the names of the inputs."""
         return {p.name for p in self.input}
 
-    @property
+    @cached_property
     def config_names(self) -> set[str]:
         """Return the names of the config."""
         return {p.name for p in self.config}
 
-    @property
+    @cached_property
     def output_names(self) -> set[str]:
         """Return the names of the outputs."""
         result = {p.name for p in self.outputs}
@@ -163,7 +164,7 @@ def output_names(self) -> set[str]:
             result.add(default_output)
         return result
 
-    @property
+    @cached_property
     def required_input_names(self) -> set[str]:
         """Return the required named inputs."""
         result = {p.name for p in self.input if p.required}
@@ -171,7 +172,7 @@ def required_input_names(self) -> set[str]:
             result.update(self.named_inputs.required)
         return result
 
-    @property
+    @cached_property
     def required_config_names(self) -> set[str]:
         """Return the required named inputs."""
         return {p.name for p in self.config if p.required}
diff --git a/python/reactivedataflow/reactivedataflow/graph_builder.py b/python/reactivedataflow/reactivedataflow/graph_builder.py
index 38e7ad1a..5c9b520f 100644
--- a/python/reactivedataflow/reactivedataflow/graph_builder.py
+++ b/python/reactivedataflow/reactivedataflow/graph_builder.py
@@ -154,17 +154,24 @@ def build_nodes() -> dict[str, Node]:
             nodes: dict[str, Node] = {}
             for nid in self._graph.nodes:
                 node = self._graph.nodes[nid]
-                node_config = node.get("config", {}) or {}
-
                 # Check the `input` flag in the nx graph to determine if this is an input node.
                 if node.get("input"):
                     nodes[nid] = InputNode(nid)
                     continue
 
+                registration = registry.get(node["verb"])
+                node_config = node.get("config", {}) or {}
+
                 # Set up an execution node
                 verb = registry.get_verb_function(node["verb"])
-                node_final_config = {**config, **node_config}
-                execution_node = ExecutionNode(nid, verb, node_final_config)
+                node_global_config = {
+                    key: value
+                    for key, value in config.items()
+                    if key in registration.bindings.config_names
+                }
+                node_config = {**node_global_config, **node_config}
+
+                execution_node = ExecutionNode(nid, verb, node_config)
                 nodes[nid] = execution_node
             return nodes
 
diff --git a/python/reactivedataflow/tests/unit/test_graph_builder.py b/python/reactivedataflow/tests/unit/test_graph_builder.py
index dc27f71f..4b04fa35 100644
--- a/python/reactivedataflow/tests/unit/test_graph_builder.py
+++ b/python/reactivedataflow/tests/unit/test_graph_builder.py
@@ -350,11 +350,18 @@ def add_strict(a: int, b: int) -> int:
     def constant_strict(value: int) -> int:
         return value
 
+    # Global Config values aren't strictly checked
+    builder = GraphBuilder()
+    builder.add_node("c1", "constant_strict", config={"value": 1})
+    builder.build(config={"hey": "there"}, registry=registry)
+
+    # Pass in a bad config value to a node
     builder = GraphBuilder()
     builder.add_node("c1", "constant_strict", config={"value": 1, "UNKNOWN": 3})
     with pytest.raises(NodeConfigNotDefinedError):
         builder.build(registry=registry)
 
+    # Pass in a bad input port value
     builder = GraphBuilder()
     builder.add_node("c1", "constant_strict", config={"value": 1})
     builder.add_node("c2", "constant_strict", config={"value": 2})
@@ -366,6 +373,7 @@ def constant_strict(value: int) -> int:
     with pytest.raises(NodeInputNotDefinedError):
         builder.build(registry=registry)
 
+    # Wire in a bad output port
     builder = GraphBuilder()
     builder.add_node("c1", "constant_strict", config={"value": 1})
     builder.add_node("c2", "constant_strict", config={"value": 2})