Source: How WebHooks Work (System Design)
- Type: YouTube Video / Architectural Research
- URL: https://www.youtube.com/watch?v=oQaJn6RdA3g
- Date Ingested: 2026-04-22
- Topic: System Design / Event-Driven Architecture
Summary
The video explains the foundational mechanics of webhooks (HTTP callbacks). Our research expanded this into production-grade patterns for building reliable, secure, and idempotent webhook consumers.
Key Technical Takeaways
- Acknowledgment vs. Processing: Always acknowledge (200 OK) as fast as possible after persistence. Move logic to a background worker.
- Deduplication: Use persistent idempotency keys to handle “at-least-once” delivery duplicates.
- Security: Mandatory HMAC signature verification and replay protection via timestamps.
- Failure Handling: Exponential backoff with jitter and Dead Letter Queues (DLQ) for unprocessable events.
Synthesized into: Webhooks