The illustrative setup
This illustrative receiver accepts only events from a system you control and verifies its own shared secret before it queues work.
Constraints to set before building
Budget the small HTTP process, a bounded queue and logs alongside the OS. Decide where a failed event is recorded and how a duplicate is recognized.
A small application workflow
Start with one endpoint, a local readiness check and an explicit failure path. Keep the secret outside source code and test with disposable event data.
What the builder reviews
The worksheet records the accepted event shape, retry limit, log fields and a restore target for its small data store.
What this scenario is not
It is not a deployed OffVPS application or a promise of delivery capacity.