A Simple Introduction to Idempotent APIs (single server)

Summary

The main theme is implementing API endpoint idempotency in a non-distributed environment using an "Idempotency-Key" header. The process involves checking for the key, looking for a cached response, and then either returning the cached response or executing the request and caching the result. The practical takeaway is that this approach prevents duplicate requests and can be adapted for distributed systems with tools like Redis.