Studio / Summer 2026 batch
Webhook reliability checks
Reproduce duplicate, reordered and retried events against your local handler. Receive runnable tests and a clear record of what happened.
Enquire about this serviceBatch pausedUSD 129 per pilot · One flow · two event types · six scenarios
What you get
A delivery retry should not create a second order. A late event should not undo a newer state. We check the behavior that matters to your application before you rely on it.
- Six agreed local failure scenarios and fixtures
- Runnable tests with expected and observed behavior
- A concise findings report linked to each scenario
- Instructions for rerunning the tests yourself
What you bring
- A sanitised, runnable Node.js or TypeScript handler
- Two event types and example payloads, without secrets
- Your expected state and permitted side effects
- The specific incident or launch date
Out of scope. This pilot covers one locally reproducible flow. It excludes production access, live payments, full integration builds and certification that a payment system is safe.
Runnable tests + findings
Fictional work sample · webhook replay reportWebhook replay: access should stay cancelled
Side effects are local outbox records. This sample does not send events to a live system or certify production behavior.
Fictional order handler. Download the fixtures, example code and test instructions. This demonstrates the format and checks, not a customer deployment. Sample outputs are demonstrations, not customer case studies.Subscription paid → workspace access active; subscription cancelled → access closed.
1 / 6intentionally buggy example checks pass6 / 6corrected example checks pass
| Scenario | Buggy example | Corrected example |
|---|---|---|
| Paid event delivered twice | fail | pass |
| Cancellation event delivered twice | fail | pass |
| Older paid event arrives after cancellation | fail | pass |
| Transient failure before work, then retry | pass | pass |
| Failure after staging state and effects, then retry | fail | pass |
| Commit succeeds, acknowledgement is lost, then retry | fail | pass |