WebhookWatch · Fintech
Webhook Debugging voor Fintech
Real-time webhook debugging for Dutch developers. Test payment transaction webhooks from ING, ABN AMRO, and Adyen without risking production data.
The Scenario
Payment webhooks break in production — and you don't know why
Your fintech platform processes SEPA credit transfers, iDEAL payments, and card authorizations through webhooks from payment providers like Adyen, Mollie, and Stripe. A single malformed payload from a bank's notification endpoint can stall reconciliation, trigger false fraud alerts, or leave customers in limbo.
Marit de Vries, backend engineer at a Dutch payment startup in Amsterdam, spends an average of 4.2 hours per week chasing webhook failures. Her team integrates with three banking APIs and two payment service providers. When ABN AMRO's event notification changes a field name from amount to transactionAmount, the entire settlement pipeline silently drops events. Without a way to inspect, replay, and validate webhook payloads in a controlled environment, her team deploys hotfixes into staging and hopes the bank sends a test event.
{
"event_id": "evt_9f2a7b3c1d",
"type": "payment.completed",
"provider": "ideal",
"timestamp": "2024-11-14T09:23:41Z",
"payload": {
"transaction_id": "TXN-NL-8847201",
"amount": 2450.00,
"currency": "EUR",
"merchant_reference": "INV-2024-1187",
"bank": "ING",
"status": "settled"
}
}
Benefits for Fintech Teams
Catch webhook issues before they touch your ledger
WebhookWatch gives your engineering team a safe sandbox to validate every payment event before it reaches your core banking system. Inspect payloads, replay failed deliveries, and set up automated schema validation — all without touching production.
Instant Payload Inspection
Capture and inspect webhook payloads from Adyen, Mollie, Stripe, and direct bank APIs in real time. View raw JSON, diff changes between events, and identify missing or renamed fields before they break your reconciliation engine.
Safe Replay & Retry
Replay failed webhook deliveries against your staging environment with original timestamps and headers. Test idempotency handling for duplicate payment events and verify your system correctly processes retries from payment providers.
Schema Validation Rules
Define JSON schema rules for each payment provider's webhook format. Get instant alerts when a payload deviates from expected structure — like when a PSP changes status: paid to status: captured without notice.
Delivery Analytics
Track webhook delivery rates, latency, and failure patterns across your payment integrations. Identify which provider has the highest retry rate and correlate webhook failures with settlement delays in your dashboard.
Security Focus
Zero production data. Full audit compliance.
Fintech teams handle sensitive financial data. WebhookWatch is built so your engineering team can debug payment webhooks without ever exposing customer PII, account details, or transaction amounts to an uncontrolled environment.
End-to-End Encryption
All webhook payloads are encrypted in transit (TLS 1.3) and at rest (AES-256). Your temporary endpoint URLs are unique, time-limited, and shareable only with authorized team members. No payload data persists beyond the configured retention window.
GDPR & PSD2 Aligned
WebhookWatch processes data on EU-based infrastructure. Automatic data masking strips IBANs, BIC codes, and card numbers from stored logs. Your team can debug structure and flow without retaining regulated financial identifiers.
Signature Verification
Validate HMAC signatures from Adyen, Stripe, and Mollie directly in the WebhookWatch interface. Confirm that every webhook originates from the claimed provider before your application processes it — catching spoofed events during integration testing.
// Verify Adyen webhook signature before processing
const signature = request.headers['x-adyen-signature'];
const payload = request.body;
const isValid = WebhookWatch.verify(signature, payload, process.env.ADYEN_HMAC_KEY);
if (!isValid) {
// Log to WebhookWatch dashboard for investigation
WebhookWatch.alert('signature_mismatch', {
provider: 'adyen',
event: payload.eventCode
});
}
Teams at fintech companies like a payment gateway in Rotterdam and a neobank based in Utrecht use WebhookWatch to validate webhook integrations across their entire payment stack — from initial PSP onboarding through production monitoring — while maintaining full compliance with Dutch and EU financial regulations.