WebhooksFebruary 28, 2026·10 min read

Stripe Webhook Monitoring: The Complete Guide

Webhooks are the backbone of Stripe integrations. When they fail silently, everything downstream breaks. Here's how to monitor them properly.

Why Webhook Monitoring Matters

Stripe webhooks are how your application learns about events — successful payments, failed charges, subscription changes, refunds, disputes, and more. If your webhook endpoint goes down or starts returning errors, your entire payment flow breaks silently.

Unlike API calls where you get immediate feedback, webhook failures are invisible. Stripe will retry failed deliveries, but after exhausting retries (over approximately 3 days), the event is permanently lost. The consequences can be severe — and they compound fast, as we explain in our article on how payment failures cost SaaS founders real revenue:

●Customers pay but don't get access to your product
●Subscriptions cancel but users keep access indefinitely
●Disputes go uncontested past the response deadline
●Invoices aren't created or sent on time

How Stripe Webhooks Work

Before diving into monitoring, let's understand the webhook lifecycle:

Event occurs — e.g., charge.succeeded

Stripe sends POST to your endpoint — with event payload + signature

Your server processes and returns 2xx — within 20 seconds

If non-2xx or timeout → Stripe retries — up to ~16 times over 3 days

After all retries fail → event is lost — endpoint may be disabled

The critical point: your endpoint must respond with a 2xx status code within 20 seconds. Anything else triggers retries. This is why monitoring response times and error rates is essential.

What to Monitor in Your Webhook Pipeline

A comprehensive webhook monitoring strategy covers these key metrics:

1. Delivery Success Rate

Track the percentage of webhooks that receive a 2xx response on the first attempt. A healthy endpoint should have a 99.9%+ success rate. Anything below 99% signals a problem.

2. Response Time (p50, p95, p99)

Stripe has a 20-second timeout. If your p95 response time creeps above 5 seconds, you're at risk of timeouts during load spikes. Aim for under 1 second.

3. Error Rate by Type

Differentiate between 4xx errors (usually your code has a bug) and 5xx errors (server issues). Monitor spikes in specific HTTP status codes.

4. Event Processing Lag

Measure the time between when Stripe creates an event and when your system finishes processing it. Growing lag means your pipeline is falling behind.

5. Missing Events

Periodically reconcile your database against Stripe's event list. If events exist in Stripe but not in your system, your webhook pipeline has gaps.

Common Webhook Failure Patterns

Here are the most frequent webhook failures we see in production Stripe integrations:

Pattern	Cause	Fix
Timeout (no response)	Heavy processing in webhook handler	Use async processing with a job queue
500 Internal Error	Unhandled exception in handler	Add try/catch and error logging
Signature verification failed	Wrong webhook secret or body parsing	Use raw body for verification
Duplicate processing	Not checking idempotency keys	Track processed event IDs
Endpoint disabled	Too many consecutive failures	Fix endpoint, re-enable in Stripe

Best Practices for Webhook Reliability

Process Webhooks Asynchronously

Your webhook endpoint should acknowledge receipt immediately (return 200) and process the event in a background job. This prevents timeouts and ensures Stripe never waits for your business logic.

Always Verify Webhook Signatures

Use Stripe's stripe.webhooks.constructEvent() to verify every incoming webhook. This prevents spoofed events and ensures data integrity. Always use the raw request body for verification.

Implement Idempotency

Stripe may deliver the same event multiple times (retries, network issues). Track processed event IDs in your database and skip duplicates. This prevents double-charging, double-provisioning, or other unintended side effects.

Handle All Critical Event Types

Don't just handle checkout.session.completed. Handle failure events, disputes, subscription changes, and refunds. Each has different implications for your application state.

Set Up Event Reconciliation

Run a periodic job that fetches recent events from Stripe's API and compares them to your processed events log. This catches any webhooks that were lost during downtime.

Automate Everything with Faultly

Building a complete webhook monitoring system from scratch requires logging infrastructure, alerting pipelines, and a status page. Faultly handles all of this automatically:

✓Monitors all webhook events — successes and failures
✓Alerts on Slack and Discord when failure rates spike
✓Provides a public status page for customer transparency
✓Full incident timeline with automatic detection
✓One-click setup — connect Stripe and you're monitoring

Monitoring8 min read

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