diff --git a/griptape/drivers/event_listener/griptape_cloud_event_listener_driver.py b/griptape/drivers/event_listener/griptape_cloud_event_listener_driver.py
index 44e54cfdf8..181a246f6c 100644
--- a/griptape/drivers/event_listener/griptape_cloud_event_listener_driver.py
+++ b/griptape/drivers/event_listener/griptape_cloud_event_listener_driver.py
@@ -1,6 +1,5 @@
 from __future__ import annotations
 
-import uuid
 import os
 import requests
 
@@ -18,9 +17,16 @@ class GriptapeCloudEventListenerDriver(BaseEventListenerDriver):
     headers: dict = field(
         default=Factory(lambda self: {"Authorization": f"Bearer {self.api_key}"}, takes_self=True), kw_only=True
     )
-    run_id: str = field(default=os.getenv("GT_CLOUD_RUN_ID", uuid.uuid4().hex), kw_only=True)
+    run_id: str = field(default=Factory(lambda: os.getenv("GT_CLOUD_RUN_ID")), kw_only=True)
+
+    @run_id.validator  # pyright: ignore
+    def validate_run_id(self, _, run_id: str):
+        if run_id is None:
+            raise ValueError(
+                "run_id must be set either in the constructor or as an environment variable (GT_CLOUD_RUN_ID)."
+            )
 
     def try_publish_event(self, event: BaseEvent) -> None:
-        url = urljoin(self.base_url.strip("/"), "/api/events")
+        url = urljoin(self.base_url.strip("/"), f"/api/runs/{self.run_id}/events/")
 
-        requests.post(url=url, json={"run_id": self.run_id, "event": event.to_dict()}, headers=self.headers)
+        requests.post(url=url, json=event.to_dict(), headers=self.headers)
diff --git a/griptape/utils/stream.py b/griptape/utils/stream.py
index 6cd7566dde..80d3ea5a17 100644
--- a/griptape/utils/stream.py
+++ b/griptape/utils/stream.py
@@ -4,7 +4,6 @@
 from threading import Thread
 from queue import Queue
 from griptape.artifacts.text_artifact import TextArtifact
-from griptape.drivers.event_listener.local_event_listener_driver import LocalEventListenerDriver
 from griptape.events.completion_chunk_event import CompletionChunkEvent
 from griptape.events.event_listener import EventListener
 from griptape.events.base_event import BaseEvent
@@ -54,6 +53,8 @@ def run(self, *args) -> Iterator[TextArtifact]:
         t.join()
 
     def _run_structure(self, *args):
+        from griptape.drivers import LocalEventListenerDriver
+
         def event_handler(event: BaseEvent):
             self._event_queue.put(event)
 
diff --git a/tests/unit/drivers/event_listener/test_griptape_cloud_event_listener_driver.py b/tests/unit/drivers/event_listener/test_griptape_cloud_event_listener_driver.py
index 729c2f7c44..be6340b45b 100644
--- a/tests/unit/drivers/event_listener/test_griptape_cloud_event_listener_driver.py
+++ b/tests/unit/drivers/event_listener/test_griptape_cloud_event_listener_driver.py
@@ -1,5 +1,6 @@
 from unittest.mock import Mock
 from pytest import fixture
+import pytest
 from tests.mocks.mock_event import MockEvent
 from griptape.drivers.event_listener.griptape_cloud_event_listener_driver import GriptapeCloudEventListenerDriver
 
@@ -26,7 +27,11 @@ def test_try_publish_event(self, mock_post, driver):
         driver.try_publish_event(event=event)
 
         mock_post.assert_called_once_with(
-            url="https://cloud.griptape.ai/api/events",
-            json={"run_id": driver.run_id, "event": event.to_dict()},
+            url=f"https://cloud.griptape.ai/api/runs/{driver.run_id}/events/",
+            json=event.to_dict(),
             headers={"Authorization": "Bearer foo bar"},
         )
+
+    def test_no_run_id(self):
+        with pytest.raises(ValueError):
+            GriptapeCloudEventListenerDriver(api_key="foo bar")