As with a 100, a 103 is tentative — it doesn't guarantee that the final result will be 2xx. This can happen if e.g. your web server is responsible for sending t

As with a 100, a 103 is tentative — it doesn't guarantee that the final result will be 2xx. This can happen if e.g. your web server is responsible for sending the early hints, before proxying to your app server.