Designing Idempotent APIs for Real-World Applications

This story was originally published on HackerNoon at: https://hackernoon.com/designing-idempotent-apis-for-real-world-applications. Learn how idempotency keys prevent duplicate payments, orders, and webhooks. Build reliable APIs that safely handle retries and distributed system failures. Check more stories related to programming at: https://hackernoon.com/c/programming. You can also check exclusive content about #idempotency, #api-design, #idempotency-key-pattern, #webhook-idempotency, #reliable-distributed-systems, #api-retry-handling, #rest-api-design, #idempotency-table-design, and more. This story was written by: @satyam. Learn more about this writer by checking @satyam's about page, and for more stories, please visit hackernoon.com. Idempotent APIs help systems safely handle retries, duplicate clicks, network failures, and repeated webhook deliveries without creating duplicate records or side effects. They are especially important in payment flows, order creation, booking systems, background jobs, and any workflow where doing the same thing twice can cause real business damage.