Webhook Handler Not Processing Events
Webhook endpoint receives POST requests (verified in logs) but event handlers don't execute. The webhook returns 200 OK but triggers no side effects. Events are silently dropped with no error indication, making this extremely difficult to debug.
This commonly happens when webhook routing is correct but handlers aren't invoked, or when async processing silently fails.
Error Messages You Might See
Common Causes
- Webhook route defined but handler not actually attached to route
- Event type check fails (comparing event.type to unexpected value)
- Handler throws exception but caught and silently ignored
- Async handler fired but not awaited, task completes after response sent
- Webhook signature verification fails, request rejected before reaching handler
How to Fix It
Add logging at webhook entry point to confirm route hit. Log the event payload to see what's received. Verify signature verification logic. Use try-catch with logging around handler execution. Ensure async operations complete before responding. Return 200 only after handler confirms success. Test with curl: curl -X POST -H 'Content-Type: application/json' -d '{}' http://localhost:8080/webhook
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Jared Hasson
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Milan Surelia
Milan Surelia is a Mobile App Developer with 5+ years of experience crafting scalable, cross-platform apps at 7Span and Meticha. At 7Span, he engineers feature-rich Flutter apps with smooth performance and modern UI. As the Co-Founder of Meticha, he builds open-source tools and developer-focused products that solve real-world problems.
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Notable Achievements:
🎯 Revamped the Vepaar app into Vepaar Store & CRM with a 2x performance boost and smoother UX.
🚀 Launched Compose101 — a Jetpack Compose starter kit to speed up Android development.
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🎖️ Worked on improving app performance and user experience with smart solutions.
Milan is always happy to connect, work on new ideas, and explore the latest in technology.
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I’m a Senior Python Developer specializing in building secure, scalable, and highly available systems. I work primarily with Python, Django, FastAPI, Docker, PostgreSQL, and modern AI tooling such as PydanticAI, focusing on clean architecture, strong design principles, and reliable DevOps practices. I enjoy solving complex engineering problems and designing systems that are maintainable, resilient, and built to scale.
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I’ve watched the tech landscape evolve over the last decade—from the structured days of Java Server Pages to the current "wild west" of Agentic-driven development. While AI can "vibe" a frontend into existence, I specialize in the architecture that keeps it from collapsing.
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ISHANTDEEP SINGH
Senior Software Engineer with 7+ years of experience in React, JavaScript, TypeScript, Next.js, and Node.js. I’ve also worked as a tech lead for startups, owning end-to-end technical execution including architecture, development, scaling, and delivery. I bring a strong mix of hands-on coding, product thinking, and technical leadership, and I’m comfortable building products from scratch as well as improving and scaling existing systems.
Nam Tran
10 years as fullstack developer
Simon A.
I'm a backend developer building APIs, emulators, and interactive game systems. Professionally, I've developed Java/Spring reporting solutions, managed relational and NoSQL databases, and implemented CI/CD workflows.
Anthony Akpan
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Get HelpFrequently Asked Questions
Why does webhook return 200 immediately?
It's safe to return 200 after validation but queue async work. Use event queues/background jobs for actual processing. Webhook should just acknowledge receipt.
How to validate webhook signatures?
Provider sends signature header (e.g., X-Signature). Compute HMAC-SHA256(payload, secret), compare to signature. Return 401 if invalid.
How to debug webhook delivery?
Most providers have webhook delivery logs. Check there first to see if request was sent. Add logging to handler to confirm execution.