What causes silent failures in production APIs?

Aggressive caching by gateways or CDNs on POST requests, serving stored 200 OKs without hitting your app — especially with static idempotency keys.

How do you stop API gateways from caching webhooks?

Add Cache-Control: no-store header and use unique idempotency keys per event to make requests uncacheable.

Absolutely — distributed caches like Cloudflare Workers amplify silent failures across globals; audit headers religiously.

⚙️ DevOps & Platform Eng

こんな光景だ。ステージングではアプリが順調に回るのに、本番でイベントを食い殺す。沈黙のキャッシュが再び牙を剥き、幽霊200を吐きながらビジネスが血を流す

DevTools Feed Apr 03, 2026 1 min read 11 views

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#API caching #idempotency keys #production-debugging #webhook failures

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Originally reported by dev.to