Webhook and notification repair
An HTTP 200 can still hide a broken workflow.
SignalMend follows one event from signature verification through processing, idempotency, downstream action, and receipt state—without promising business outcomes.
$49 diagnosis · $149 first repair pilot · starts after funding and access
Good first-pilot signals
- The provider reports delivery, but the downstream action never happens.
- Retries create duplicate orders, emails, or records.
- Signature or timestamp checks reject legitimate events.
- The handler acknowledges an event before durable processing finishes.
Included
- One event type and reproducible failure
- Sanitized payload and receipt tracing
- Signature, retry, and idempotency checks
- A bounded handler or configuration repair
- Replay-safe test evidence and rollback note
Not included
- A new payment platform or full checkout build
- Handling real card data or client secrets in chat
- Security certification or compliance attestation
- Guaranteed uptime, delivery, or revenue
- Changes before scope, funding, and authorized access
Acceptance
A repair is complete only when the evidence is repeatable.
- 01A valid test event is verified and processed exactly once.
- 02An invalid signature is rejected without a side effect.
- 03A repeated event does not duplicate the downstream action.
- 04The event ID and final receipt state can be traced.
Relevant evidence
KLENBA 8 verified delivery implementation
A self-initiated storefront case demonstrates Stripe session and webhook verification code, expiring signed delivery, and idempotent email fulfillment. Its live purchase flow has not been independently verified, and no sales are claimed.