diff --git a/src/frequenz/dispatch/_actor_dispatcher.py b/src/frequenz/dispatch/_actor_dispatcher.py
index 4419b5e..5366936 100644
--- a/src/frequenz/dispatch/_actor_dispatcher.py
+++ b/src/frequenz/dispatch/_actor_dispatcher.py
@@ -181,7 +181,7 @@ def _update_dispatch_information(self, dispatch_update: DispatchInfo) -> None:
 
     async def main():
         url = os.getenv("DISPATCH_API_URL", "grpc://dispatch.url.goes.here.example.com")
-        auth_key = os.getenv("DISPATCH_API_AUTH_KEY", "some-key")
+        key = os.getenv("DISPATCH_API_KEY", "some-key")
         sign_secret = os.getenv("DISPATCH_API_SIGN_SECRET")
 
         microgrid_id = 1
@@ -189,7 +189,7 @@ async def main():
         async with Dispatcher(
             microgrid_id=microgrid_id,
             server_url=url,
-            auth_key=auth_key,
+            key=key,
             sign_secret=sign_secret,
         ) as dispatcher:
             status_receiver = dispatcher.new_running_state_event_receiver("EXAMPLE_TYPE")
diff --git a/src/frequenz/dispatch/_dispatcher.py b/src/frequenz/dispatch/_dispatcher.py
index d7a793e..f0198e2 100644
--- a/src/frequenz/dispatch/_dispatcher.py
+++ b/src/frequenz/dispatch/_dispatcher.py
@@ -65,7 +65,7 @@ async def run():
             async with Dispatcher(
                 microgrid_id=microgrid_id,
                 server_url=url,
-                auth_key=key
+                key=key
             ) as dispatcher:
                 dispatcher.start_managing(
                     dispatch_type="DISPATCH_TYPE",
@@ -91,7 +91,7 @@ async def run():
             async with Dispatcher(
                 microgrid_id=microgrid_id,
                 server_url=url,
-                auth_key=key
+                key=key
             ) as dispatcher:
                 actor = MagicMock() # replace with your actor
 
@@ -136,7 +136,7 @@ async def run():
             async with Dispatcher(
                 microgrid_id=microgrid_id,
                 server_url=url,
-                auth_key=key,
+                key=key,
             ) as dispatcher:
                 events_receiver = dispatcher.new_lifecycle_events_receiver("DISPATCH_TYPE")
 
@@ -173,7 +173,7 @@ async def run():
             async with Dispatcher(
                 microgrid_id=microgrid_id,
                 server_url=url,
-                auth_key=key,
+                key=key,
             ) as dispatcher:
                 # Create a new dispatch
                 new_dispatch = await dispatcher.client.create(
@@ -217,8 +217,8 @@ def __init__(
         Args:
             microgrid_id: The microgrid id.
             server_url: The URL of the dispatch service.
-            key: The key to access the service, deprecated, use `auth_key` instead.
-            auth_key: The authentication key to access the service.
+            key: The key to access the service.
+            auth_key: Deprecated, use `key` instead.
             sign_secret: The secret to sign the requests, optional
             call_timeout: The timeout for API calls.
             stream_timeout: The timeout for streaming API calls.
@@ -230,25 +230,23 @@ def __init__(
 
         if key is not None and auth_key is not None:
             raise ValueError(
-                "Both 'key' and 'auth_key' are provided, please use only 'auth_key'."
+                "Both 'key' and 'auth_key' are provided, please use only 'key'."
             )
 
         if key is None and auth_key is None:
-            raise ValueError(
-                "'auth_key' must be provided to access the dispatch service."
-            )
+            raise ValueError("'key' must be provided to access the dispatch service.")
 
-        if key is not None:
-            auth_key = key
+        if auth_key is not None:
+            key = auth_key
             warnings.warn(
-                "'key' is deprecated, use 'auth_key' instead.",
+                "'auth_key' is deprecated, use 'key' instead.",
                 DeprecationWarning,
                 stacklevel=2,
             )
 
         self._client = DispatchApiClient(
             server_url=server_url,
-            auth_key=auth_key,
+            key=key,
             sign_secret=sign_secret,
             call_timeout=call_timeout,
             stream_timeout=stream_timeout,