diff --git a/.github/workflows/docs-integration-tests.yml b/.github/workflows/docs-integration-tests.yml
index 241c4a2ef..ce30f83bb 100644
--- a/.github/workflows/docs-integration-tests.yml
+++ b/.github/workflows/docs-integration-tests.yml
@@ -72,6 +72,7 @@ jobs:
       GOOGLE_AUTH_URI: ${{ secrets.INTEG_GOOGLE_AUTH_URI }}
       GOOGLE_TOKEN_URI: ${{ secrets.INTEG_GOOGLE_TOKEN_URI }}
       GOOGLE_AUTH_PROVIDER_X509_CERT_URL: ${{ secrets.INTEG_GOOGLE_AUTH_PROVIDER_X509_CERT_URL }}
+      GT_CLOUD_API_KEY: ${{ secrets.INTEG_GRIPTAPE_CLOUD_API_KEY }}
       GRIPTAPE_CLOUD_API_KEY: ${{ secrets.INTEG_GRIPTAPE_CLOUD_API_KEY }}
       GRIPTAPE_CLOUD_STRUCTURE_ID: ${{ secrets.INTEG_GRIPTAPE_CLOUD_STRUCTURE_ID }}
       GRIPTAPE_CLOUD_BASE_URL: ${{ secrets.INTEG_GRIPTAPE_CLOUD_BASE_URL }}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6483152d6..d146d815a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Native function calling support to `OpenAiChatPromptDriver`, `AzureOpenAiChatPromptDriver`, `AnthropicPromptDriver`, `AmazonBedrockPromptDriver`, `GooglePromptDriver`, and `CoherePromptDriver`.
 - `OllamaEmbeddingDriver` for generating embeddings with Ollama.
 - `GriptapeCloudKnowledgeBaseVectorStoreDriver` to query Griptape Cloud Knowledge Bases.
+- `GriptapeCloudEventListenerDriver.api_key` defaults to the value in the `GT_CLOUD_API_KEY` environment variable.
 
 ### Changed
 - **BREAKING**: `BaseVectorStoreDriver.upsert_text_artifacts` optional arguments are now keyword-only arguments.
diff --git a/docs/griptape-framework/drivers/event-listener-drivers.md b/docs/griptape-framework/drivers/event-listener-drivers.md
index 4a85bc9a4..5e73f1a09 100644
--- a/docs/griptape-framework/drivers/event-listener-drivers.md
+++ b/docs/griptape-framework/drivers/event-listener-drivers.md
@@ -50,9 +50,9 @@ from griptape.drivers import GriptapeCloudEventListenerDriver
 from griptape.events import FinishStructureRunEvent
 from griptape.artifacts import TextArtifact
 
-event_driver = GriptapeCloudEventListenerDriver(
-    api_key=os.environ["GRIPTAPE_CLOUD_API_KEY"]
-)
+# By default, GriptapeCloudEventListenerDriver uses the api key provided
+# in the GT_CLOUD_API_KEY environment variable.
+event_driver = GriptapeCloudEventListenerDriver()  
 
 done_event = FinishStructureRunEvent(
     output_task_input=TextArtifact("Just started!"),
@@ -173,9 +173,9 @@ agent = Agent(
     event_listeners=[
         EventListener(
             event_types=[FinishStructureRunEvent],
-            driver=GriptapeCloudEventListenerDriver(
-                api_key=os.environ["GRIPTAPE_CLOUD_API_KEY"],
-            ),
+            # By default, GriptapeCloudEventListenerDriver uses the api key provided
+            # in the GT_CLOUD_API_KEY environment variable.
+            driver=GriptapeCloudEventListenerDriver(),
         ),
     ],
 )
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 2e208d786..cf9dd7bd2 100644
--- a/griptape/drivers/event_listener/griptape_cloud_event_listener_driver.py
+++ b/griptape/drivers/event_listener/griptape_cloud_event_listener_driver.py
@@ -24,7 +24,7 @@ class GriptapeCloudEventListenerDriver(BaseEventListenerDriver):
         default=Factory(lambda: os.getenv("GT_CLOUD_BASE_URL", "https://cloud.griptape.ai")),
         kw_only=True,
     )
-    api_key: str = field(kw_only=True)
+    api_key: str = field(default=Factory(lambda: os.getenv("GT_CLOUD_API_KEY")), kw_only=True)
     headers: dict = field(
         default=Factory(lambda self: {"Authorization": f"Bearer {self.api_key}"}, takes_self=True),
         kw_only=True,
diff --git a/griptape/tools/calculator/tool.py b/griptape/tools/calculator/tool.py
index 141d1a333..e8fcb1ed4 100644
--- a/griptape/tools/calculator/tool.py
+++ b/griptape/tools/calculator/tool.py
@@ -21,7 +21,7 @@ class Calculator(BaseTool):
         },
     )
     def calculate(self, params: dict) -> BaseArtifact:
-        import numexpr
+        import numexpr  # pyright: ignore[reportMissingImports]
 
         try:
             expression = params["values"]["expression"]