diff --git a/foxglove/client/api.py b/foxglove/client/api.py
index 9f84255..e3f066e 100644
--- a/foxglove/client/api.py
+++ b/foxglove/client/api.py
@@ -1301,6 +1301,7 @@ def update_session(
         session_id: Optional[str] = None,
         session_key: Optional[str] = None,
         project_id: str,
+        new_key: Optional[str] = None,
         add_recording_ids: Optional[List[str]] = None,
         remove_recording_ids: Optional[List[str]] = None,
         properties: Optional[Dict[str, Union[str, bool, float, int]]] = None,
@@ -1308,8 +1309,9 @@ def update_session(
         """Updates a session.
 
         session_id: The ID of the session to update.
-        session_key: The key of the session to update.
+        session_key: The current key of the session to update.
         project_id: The Project ID to which the session belongs.
+        new_key: Optional new user-supplied identifier, unique within the project.
         add_recording_ids: IDs of recordings to add to the session.
         remove_recording_ids: IDs of recordings to remove from the session.
         properties: Optional custom properties to add to or edit on the session.
@@ -1319,6 +1321,7 @@ def update_session(
         identifier = _session_identifier_for_path(session_id, session_key)
 
         params = {
+            "key": new_key,
             "addRecordingIds": add_recording_ids,
             "removeRecordingIds": remove_recording_ids,
             "properties": properties,
diff --git a/tests/test_sessions.py b/tests/test_sessions.py
index 4cecbfc..bec3c27 100644
--- a/tests/test_sessions.py
+++ b/tests/test_sessions.py
@@ -178,6 +178,59 @@ def test_update_session():
     assert result["properties"] == props
 
 
+@responses.activate
+def test_update_session_key():
+    session_id = fake.uuid4()
+    project_id = fake.uuid4()
+    new_key = "renamed-session"
+    s = _make_session_json(
+        session_id=session_id,
+        project_id=project_id,
+        key=new_key,
+    )
+    responses.add(
+        responses.PATCH,
+        api_url(f"/v1/sessions/{session_id}"),
+        match=[
+            query_string_matcher(f"projectId={project_id}"),
+            json_params_matcher({"key": new_key}),
+        ],
+        json=s,
+    )
+    client = Client("test")
+    result = client.update_session(
+        session_id=session_id,
+        project_id=project_id,
+        new_key=new_key,
+    )
+    assert result["id"] == session_id
+    assert result["key"] == new_key
+
+
+@responses.activate
+def test_update_session_key_by_existing_key():
+    session_key = "old-session"
+    new_key = "new-session"
+    project_id = fake.uuid4()
+    s = _make_session_json(key=new_key, project_id=project_id)
+    responses.add(
+        responses.PATCH,
+        api_url(f"/v1/sessions/{session_key}"),
+        match=[
+            query_string_matcher(f"projectId={project_id}"),
+            json_params_matcher({"key": new_key}),
+        ],
+        json=s,
+    )
+    client = Client("test")
+    result = client.update_session(
+        session_key=session_key,
+        project_id=project_id,
+        new_key=new_key,
+    )
+    assert result["key"] == new_key
+
+
 @responses.activate
 def test_delete_session():
     session_id = fake.uuid4()