diff --git a/comfy_api/latest/__init__.py b/comfy_api/latest/__init__.py
index 05f43293a..2d83ec012 100644
--- a/comfy_api/latest/__init__.py
+++ b/comfy_api/latest/__init__.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+from abc import ABC, abstractmethod
 from typing import Type, TYPE_CHECKING
 from comfy_api.internal import ComfyAPIBase
 from comfy_api.internal.singleton import ProxiedSingleton
@@ -75,6 +76,19 @@ class ComfyAPI_latest(ComfyAPIBase):
 
     execution: Execution
 
+class ComfyExtension(ABC):
+    async def on_load(self) -> None:
+        """
+        Called when an extension is loaded.
+        This should be used to initialize any global resources neeeded by the extension.
+        """
+
+    @abstractmethod
+    async def get_node_list(self) -> list[type[io.ComfyNode]]:
+        """
+        Returns a list of nodes that this extension provides.
+        """
+
 class Input:
     Image = ImageInput
     Audio = AudioInput
@@ -106,4 +120,5 @@ __all__ = [
     "Input",
     "InputImpl",
     "Types",
+    "ComfyExtension",
 ]
diff --git a/comfy_extras/nodes_v3_test.py b/comfy_extras/nodes_v3_test.py
index 9e43ef290..7372b3850 100644
--- a/comfy_extras/nodes_v3_test.py
+++ b/comfy_extras/nodes_v3_test.py
@@ -1,11 +1,12 @@
 import torch
 import time
-from comfy_api.latest import io, ui, resources, _io
+from comfy_api.latest import io, ui, resources, _io, ComfyExtension
 import logging  # noqa
 import folder_paths
 import comfy.utils
 import comfy.sd
 import asyncio
+from typing_extensions import override
 
 @io.comfytype(io_type="XYZ")
 class XYZ(io.ComfyTypeIO):
@@ -273,7 +274,6 @@ class V3DummyEndInherit(V3DummyEnd):
         logging.info(f"V3DummyEndInherit: {cls.COOL_VALUE}")
         return super().execute(xyz)
 
-
 NODES_LIST: list[type[io.ComfyNode]] = [
     V3TestNode,
     V3LoraLoader,
@@ -283,3 +283,11 @@ NODES_LIST: list[type[io.ComfyNode]] = [
     V3DummyEnd,
     V3DummyEndInherit,
 ]
+
+class v3TestExtension(ComfyExtension):
+    @override
+    async def get_node_list(self) -> list[type[io.ComfyNode]]:
+        return NODES_LIST
+
+async def comfy_entrypoint() -> v3TestExtension:
+    return v3TestExtension()
diff --git a/nodes.py b/nodes.py
index 51df2b064..ea43f4ea5 100644
--- a/nodes.py
+++ b/nodes.py
@@ -6,6 +6,7 @@ import os
 import sys
 import json
 import hashlib
+import inspect
 import traceback
 import math
 import time
@@ -2162,6 +2163,35 @@ async def load_custom_node(module_path: str, ignore=set(), module_parent="custom
             if hasattr(module, "NODE_DISPLAY_NAME_MAPPINGS") and getattr(module, "NODE_DISPLAY_NAME_MAPPINGS") is not None:
                 NODE_DISPLAY_NAME_MAPPINGS.update(module.NODE_DISPLAY_NAME_MAPPINGS)
             return True
+        # V3 Extension Definition
+        elif hasattr(module, "comfy_entrypoint"):
+            entrypoint = getattr(module, "comfy_entrypoint")
+            if not callable(entrypoint):
+                logging.warning(f"comfy_entrypoint in {module_path} is not callable, skipping.")
+                return False
+            try:
+                if inspect.iscoroutinefunction(entrypoint):
+                    extension = await entrypoint()
+                else:
+                    extension = entrypoint()
+                if not isinstance(extension, io.ComfyExtension):
+                    logging.warning(f"comfy_entrypoint in {module_path} did not return a ComfyExtension, skipping.")
+                    return False
+                node_list = await extension.get_node_list()
+                if not isinstance(node_list, list):
+                    logging.warning(f"comfy_entrypoint in {module_path} did not return a list of nodes, skipping.")
+                    return False
+                for node_cls in node_list:
+                    node_cls: io.ComfyNode
+                    schema = node_cls.GET_SCHEMA()
+                    if schema.node_id not in ignore:
+                        NODE_CLASS_MAPPINGS[schema.node_id] = node_cls
+                        node_cls.RELATIVE_PYTHON_MODULE = "{}.{}".format(module_parent, get_module_name(module_path))
+                    if schema.display_name is not None:
+                        NODE_DISPLAY_NAME_MAPPINGS[schema.node_id] = schema.display_name
+            except Exception as e:
+                logging.warning(f"Error while calling comfy_entrypoint in {module_path}: {e}")
+                return False
         # V3 node definition
         elif getattr(module, "NODES_LIST", None) is not None:
             for node_cls in module.NODES_LIST: