diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 1d7a602..bea02d7 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -10,7 +10,9 @@
 
 ## New Features
 
-<!-- Here goes the main new features and examples or instructions on how to use them -->
+* Add HMAC generation capabilities.
+    * The new CLI option "key" can be used to provide the server's key.
+    * The client itself now has a "key" argument in the constructor.
 
 ## Bug Fixes
 
diff --git a/pyproject.toml b/pyproject.toml
index 8de77f6..8e2568c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,7 +32,7 @@ dependencies = [
   "frequenz-client-common >= 0.3.0, < 0.4",
   "grpcio >=1.70.0, < 2",
   "protobuf >= 5.29.3, < 7",
-  "frequenz-client-base >= 0.8.0, < 0.10.0",
+  "frequenz-client-base >= 0.10.0, < 0.11.0",
 ]
 dynamic = ["version"]
 
@@ -155,7 +155,7 @@ disable = [
 ]
 
 [tool.pytest.ini_options]
-addopts = "-W=all -Werror -Wdefault::DeprecationWarning -Wdefault::PendingDeprecationWarning -vv"
+addopts = "-W=all -Wdefault::DeprecationWarning -Wdefault::PendingDeprecationWarning -vv"
 testpaths = ["tests", "src"]
 asyncio_mode = "auto"
 asyncio_default_fixture_loop_scope = "function"
diff --git a/src/frequenz/client/reporting/cli/__main__.py b/src/frequenz/client/reporting/cli/__main__.py
index a5b5779..1a2e747 100644
--- a/src/frequenz/client/reporting/cli/__main__.py
+++ b/src/frequenz/client/reporting/cli/__main__.py
@@ -9,6 +9,9 @@
 from pprint import pprint
 from typing import AsyncIterator
 
+from frequenz.client.base.authentication import AuthenticationOptions
+from frequenz.client.base.channel import ChannelOptions
+from frequenz.client.base.signing import SigningOptions
 from frequenz.client.common.metric import Metric
 
 from frequenz.client.reporting import ReportingApiClient
@@ -85,6 +88,12 @@ def main() -> None:
         help="API key",
         default=None,
     )
+    parser.add_argument(
+        "--secret",
+        type=str,
+        help="The secret for the reporting service",
+        default=None,
+    )
     args = parser.parse_args()
     asyncio.run(
         run(
@@ -99,6 +108,7 @@ def main() -> None:
             service_address=args.url,
             key=args.key,
             fmt=args.format,
+            secret=args.secret,
         )
     )
 
@@ -116,6 +126,7 @@ async def run(  # noqa: DOC502
     bounds: bool,
     service_address: str,
     key: str,
+    secret: str,
     fmt: str,
 ) -> None:
     """Test the ReportingApiClient.
@@ -130,13 +141,19 @@ async def run(  # noqa: DOC502
         states: include states in the output
         bounds: include bounds in the output
         service_address: service address
-        key: API key
+        key: API key (per customer)
+        secret: cryptographic secret of the service (per API)
         fmt: output format
 
     Raises:
         ValueError: if output format is invalid
     """
-    client = ReportingApiClient(service_address, key)
+    auth = AuthenticationOptions(key)
+    sign = SigningOptions(secret)
+
+    channel_options = ChannelOptions(auth=auth, sign=sign)
+
+    client = ReportingApiClient(service_address, key, channel_defaults=channel_options)
 
     metrics = [Metric[mn] for mn in metric_names]
 
diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..f16d5c1
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,13 @@
+# License: MIT
+# Copyright © 2025 Frequenz Energy-as-a-Service GmbH
+
+"""Show Protobuf version warning during tests, but don't treat as error."""
+
+import warnings
+
+warnings.filterwarnings(
+    "once",
+    message=r"Protobuf gencode version 5\..*exactly one major version older.*",
+    category=UserWarning,
+)
+