diff --git a/app/clients/cbc_proxy.py b/app/clients/cbc_proxy.py
index 8d2a65d12..57296fa03 100644
--- a/app/clients/cbc_proxy.py
+++ b/app/clients/cbc_proxy.py
@@ -26,6 +26,12 @@ class CBCProxyNoopClient:
     def init_app(self, app):
         pass
 
+    def send_canary(
+        self,
+        identifier,
+    ):
+        pass
+
     def create_and_send_broadcast(
         self,
         identifier, headline, description, areas
@@ -57,6 +63,26 @@ class CBCProxyClient:
             aws_secret_access_key=app.config['CBC_PROXY_AWS_SECRET_ACCESS_KEY'],
         )
 
+    def send_canary(
+        self,
+        identifier,
+    ):
+        payload_bytes = bytes(json.dumps({
+            'identifier': identifier,
+        }), encoding='utf8')
+
+        result = self._lambda_client.invoke(
+            FunctionName='canary',
+            InvocationType='RequestResponse',
+            Payload=payload_bytes,
+        )
+
+        if result['StatusCode'] > 299:
+            raise Exception('Could not invoke lambda')
+
+        if 'FunctionError' in result:
+            raise Exception('Function exited with unhandled exception')
+
     def create_and_send_broadcast(
         self,
         identifier, headline, description, areas,
diff --git a/tests/app/clients/test_cbc_proxy.py b/tests/app/clients/test_cbc_proxy.py
index febcc26a4..8368180c7 100644
--- a/tests/app/clients/test_cbc_proxy.py
+++ b/tests/app/clients/test_cbc_proxy.py
@@ -1,4 +1,5 @@
 import json
+import uuid
 
 import pytest
 
@@ -165,3 +166,88 @@ def test_cbc_proxy_create_and_send_handles_function_error(mocker, cbc_proxy):
         InvocationType='RequestResponse',
         Payload=mocker.ANY,
     )
+
+
+def test_cbc_proxy_send_canary_invokes_function(mocker, cbc_proxy):
+    identifier = str(uuid.uuid4())
+
+    ld_client_mock = mocker.patch.object(
+        cbc_proxy,
+        '_lambda_client',
+        create=True,
+    )
+
+    ld_client_mock.invoke.return_value = {
+        'StatusCode': 200,
+    }
+
+    cbc_proxy.send_canary(
+        identifier=identifier,
+    )
+
+    ld_client_mock.invoke.assert_called_once_with(
+        FunctionName='canary',
+        InvocationType='RequestResponse',
+        Payload=mocker.ANY,
+    )
+
+    kwargs = ld_client_mock.invoke.mock_calls[0][-1]
+    payload_bytes = kwargs['Payload']
+    payload = json.loads(payload_bytes)
+
+    assert payload['identifier'] == identifier
+
+
+def test_cbc_proxy_send_canary_handles_invoke_error(mocker, cbc_proxy):
+    identifier = str(uuid.uuid4())
+
+    ld_client_mock = mocker.patch.object(
+        cbc_proxy,
+        '_lambda_client',
+        create=True,
+    )
+
+    ld_client_mock.invoke.return_value = {
+        'StatusCode': 400,
+    }
+
+    with pytest.raises(Exception) as e:
+        cbc_proxy.send_canary(
+            identifier=identifier,
+        )
+
+        assert e.match('Function exited with unhandled exception')
+
+    ld_client_mock.invoke.assert_called_once_with(
+        FunctionName='canary',
+        InvocationType='RequestResponse',
+        Payload=mocker.ANY,
+    )
+
+
+def test_cbc_proxy_send_canary_handles_function_error(mocker, cbc_proxy):
+    identifier = str(uuid.uuid4())
+
+    ld_client_mock = mocker.patch.object(
+        cbc_proxy,
+        '_lambda_client',
+        create=True,
+    )
+
+    ld_client_mock.invoke.return_value = {
+        'StatusCode': 200,
+        'FunctionError': 'something',
+    }
+
+    with pytest.raises(Exception) as e:
+        cbc_proxy.send_canary(
+            identifier=identifier,
+        )
+
+        assert e.match('Could not invoke lambda')
+
+    ld_client_mock.invoke.assert_called_once_with(
+        FunctionName='canary',
+        InvocationType='RequestResponse',
+        Payload=mocker.ANY,
+    )