This article was originally published on AI Study Room . For the full version with working code examples and related articles, visit the original post. Webhook Implementation: Design, Security, and Best Practices (2026) Webhooks are the backbone of event-driven architectures — they power payment notifications, CI/CD triggers, and SaaS integrations. But implementing webhooks reliably is harder than it looks: you need retry logic, idempotency, security, and monitoring. This guide covers the complete production-grade webhook implementation, both as a sender and a receiver. Webhook Architecture Overview Sender (You) Receiver (Third-Party) | | | 1. Event occurs (payment.created) | | 2. Look up webhook URL + secret | | 3. Build payload + signature | | 4. POST → ──────────────────────→ | 5. Verify signature | | 6. Process event | 7. ← 200 OK | 7. Return 200 OK | | | 8.…