--- title: Webhook Debugging in the Dashboard description: "Webhook delivery history, payload inspection, retry controls, and signature verification — the debugging experience that turns webhook integration from nightmare to manageable." canonical: https://nowah.xyz/blog/webhook-debugging-dashboard lastModified: "2026-08-07T08:12:39.672Z" --- # Webhook Debugging in the Dashboard Webhook delivery history, payload inspection, retry controls, and signature verification — the debugging experience that turns webhook integration from nightmare to manageable. A developer reached out because their booking confirmation webhooks had silently failed for three days. Their application did not send confirmation emails to customers. Their internal reporting was missing transactions. They only noticed when a customer called to ask why they never received their itinerary. The root cause was trivial: an SSL certificate had expired on their webhook endpoint. But the real problem was that they had no visibility into webhook deliveries. No delivery log. No failure alerts. No way to know that dozens of webhooks were bouncing against a broken endpoint. That incident crystallized our thinking about webhook tooling. Webhooks are inherently hard to debug because they are push-based and asynchronous. The sender fires and (hopefully) forgets. The receiver either works or fails silently. Without dedicated debugging tools, webhook integration is a black box that only reveals problems through their downstream consequences. ## The event timeline ![Illustration for this section](https://pics.nowah.xyz/website-media/developer-experience-044-img-1-payload-inspect.webp) The webhook section of the dashboard opens to a chronological timeline of all deliveries. Each entry shows the event type (booking.confirmed, payment.completed, schedule.changed), the delivery status, the timestamp, and the response code from the developer's server. Status icons make the overall health visible at a glance. Green for delivered successfully. Red for failed. Yellow for retrying. A three-day streak of red icons would have immediately alerted the developer in the SSL story above. The timeline supports filtering by event type, status, and date range. "Show me all failed deliveries in the last week" is a one-click filter. "Show me only schedule change events" is another. Each entry in the timeline is expandable. Click it, and you see the full delivery detail: what we sent and what the developer's server returned. ## Payload inspection: both sides of the conversation When a developer expands a delivery entry, they see a split view. On the left: the outgoing request -- our headers (including the request-signature signature and timestamp) and the event payload. On the right: the developer's server response -- the status code, response headers, and response body. This is where most debugging happens. The developer can see exactly what payload we delivered and exactly how their server responded. No guessing. No log correlation across systems. Both sides of the conversation in one view. The payload is syntax-highlighted with JSON folding. For large payloads (flight booking confirmations can include detailed itinerary data), the developer can collapse sections they are not investigating and focus on the fields that matter. We render the request-signature signature header prominently because signature verification issues are the most common webhook integration problem. If the developer's server is returning 401 errors, the signature header is the first thing to check. ## Retry controls ![Supporting diagram](https://pics.nowah.xyz/website-media/developer-experience-044-img-2-test-event.webp) When a delivery fails, we retry automatically with exponential backoff over 24 hours. The retry schedule and history are visible on each event entry. But sometimes automatic retries are not enough. Maybe the developer fixed their server and wants to immediately replay the failed events without waiting for the next retry window. The manual replay button re-sends the exact original payload with the original headers. It is a true replay, not a new event. This matters for debugging. If the developer changes their webhook handler and wants to test the fix, replaying the exact payload that failed is the cleanest test. No synthetic data, no guessing what the original event looked like. Developers can also configure retry policies. The defaults work for most cases, but some teams want more aggressive retries for critical events (like booking confirmations) and fewer retries for informational events (like search analytics). The dashboard lets them set policies per event type. ## Signature verification helper The signature verification test panel is one of those small features that saves hours of debugging. A developer setting up webhook verification for the first time needs to confirm that their request-signature implementation is correct. Our signatures use request-signature-SHA256 computed over the timestamp and payload with their webhook secret. The test panel lets them paste their verification code (we show examples in Node.js, Python, and Go) and test it against a known payload and signature. The panel shows step-by-step what the correct signature computation looks like: the input string, the request-signature operation, the expected output, and whether their result matches. This catches the three most common verification mistakes: using the wrong encoding (UTF-8 vs. hex), including the wrong fields in the signature input (just body vs. timestamp + body), and comparing signatures in a timing-unsafe way. ## Failure diagnosis When deliveries fail, the dashboard does not just show a red icon. It shows the specific failure reason and suggests fixes. Timeout failures (our request to the developer's server took too long): "Your server took more than 10 seconds to respond. Webhook handlers should return 200 immediately and process the event asynchronously." 5xx errors: "Your server returned a 500 error. Check your application logs for the handler at this endpoint. The response body (if any) is shown below." SSL errors: "We could not establish a secure connection. Check that your SSL certificate is valid and not expired." Connection refused: "We could not connect to your endpoint. Verify the URL is correct and your server is running." Each suggestion links to our documentation for that specific failure mode. The goal is to get the developer from "my webhooks are broken" to "I know exactly what to fix" without them needing to search for answers. ## Send test event The "Send Test Event" button in the dashboard lets developers trigger synthetic events to validate their endpoint configuration before real events flow. The developer selects an event type from a dropdown. The dashboard generates a realistic test payload for that type and shows a preview. The developer clicks "Send," and the event is delivered to their configured endpoint immediately. The test delivery appears in the timeline like any other delivery, with full payload inspection and response viewing. The developer can see if their endpoint received the event, how it responded, and whether the signature verification passed. We support test events for every event type in our system: booking.confirmed, payment.completed, schedule.changed, and others. Each test payload is realistic -- with properly formatted IDs, timestamps, and nested data structures -- so the developer's handler processes it through the same code paths as real events. Webhook integration does not have to be a nightmare. With visibility into deliveries, tools for debugging failures, and a verification helper that catches implementation mistakes, the black box opens up. The three-day silent failure that started this article would have been caught in minutes, not days. That is the difference good tooling makes. --- Nowah is an AI travel agent that searches and books real flights and hotels through conversation — no filters, no thirty open tabs. [Plan your next trip](https://app.nowah.xyz).