A short-lived, simple case created on a PegaCloud instance can be an alternative way to capture input external to a primary application. The 7.3 Lead System Architect contains an example where a cloud-hosted case is created using a Pega API POST. The user of that case is sent an email with a link and instructions how to access the cloud-hosted case. The user logs in, fills out the screen, then submits. The submit issues a Pega API PUT that updates the primary application.