INSERT INTO table FORMAT JSONEachRow {"key": 123}
Plus, it is designed in a way so you can make an INSERT query and stream the data, e.g.:
clickhouse-client --query "INSERT INTO table FORMAT Protobuf" < data.protobuf curl 'https://example.com/?query=INSERT...' --data-binary @- < data.bson
Plus, it is designed in a way so you can make an INSERT query and stream the data, e.g.: