Asynchronous Webhook-to-Database Reconciliation

Your Webhook Returned 200 OK.
Did The Customer’s Access Change?

An HTTP 200 delivery to an edge proxy does not mean your background worker provisioned the customer. OutcomeReplay monitors outcome contracts, catches silent pipeline dropouts, and enables targeted, idempotent replay without duplicate side-effects.

Try Reconciliation Sandbox How Outcome Contracts Work
✓ Stripe, GitHub & Shopify Webhooks
✓ Asynchronous Grace Windows
✓ Out-of-Order / Superseded Protection
✓ Idempotent Zero-Duplicate Replay

Event-to-Outcome Reconciliation Sandbox

Simulate a real-world incident: Stripe emits subscription upgrade, edge proxy returns 200 OK, background queue silently crashes, and OutcomeReplay detects and repairs the state.

outcomereplay-reconciler // ledger
STANDBY
// Source: Stripe Billing Webhook (customer.subscription.updated)
// Contract: stripe_sub_to_entitlement (Grace window: 15 seconds)
// Target Endpoint: POST /v1/app/entitlements/sync (Idempotent)
// Ready. Click "Simulate Webhook & Replay" to initiate test trace.

Discrepancy Inbox 0 items

No discrepancies recorded.

Repair Receipt & Proof

Receipt ID: None
Digest (SHA-256): Unsigned
Customer State: Unverified

Contract-Driven Verification

How Outcome Contracts Work

Define what business outcome an event was supposed to produce. OutcomeReplay verifies the contract automatically.

1. ASYNC GRACE PERIOD

Queues take time. OutcomeReplay suppresses alerts during the declared grace window.

contract:
  eventType: subscription.updated
  gracePeriodSeconds: 30
  retryCheckInterval: 5s
2. READ-ONLY PROBE

Scoped GET assertion checking if customer record matches the event payload.

outcomeProbe:
  url: /v1/customers/:id/tier
  expect:
    tier: event.data.plan_id
    active: true
3. TARGETED REPAIR

Dispatches replay with durable Idempotency-Key headers to prevent double-billing.

repairTarget:
  endpoint: /v1/entitlements/reconcile
  idempotencyHeader: Idempotency-Key
  timeoutRecovery: probe_first

Predictable Integration Economics

Billed per Monitored Integration Pipeline

Eliminate hours of support triage and prevent customer churn caused by silent webhook dropouts.

Diagnostic Pilot
$499 one-time

Audit your Stripe/webhook pipeline, configure contracts, and benchmark silent dropout rates.

  • ✓ 1 Critical webhook pipeline
  • ✓ Historical mismatch audit
  • ✓ Outcome contract configuration
  • ✓ Idempotency readiness review
Start Pilot Audit
Recommended
Team Platform
$99 / month

Continuous reconciliation and Discrepancy Mismatch Inbox for engineering & support teams.

  • ✓ Up to 5 Webhook sources
  • ✓ Discrepancy Mismatch Inbox
  • ✓ Out-of-order & superseded protection
  • ✓ One-click operator repair
  • ✓ Slack & PagerDuty alerts
Start Free Trial
Scale / Enterprise
$349 / month

For high-volume SaaS platforms handling millions of billing and integration webhooks.

  • ✓ Unlimited webhook sources
  • ✓ High-throughput streaming ledger
  • ✓ Dedicated customer runner
  • ✓ SOC 2 CC6.1 compliance pack
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Frequently Asked Questions

How does OutcomeReplay prevent duplicate emails or charges?

Unlike blind webhook gateways that simply resend raw HTTP payloads, OutcomeReplay checks declared target idempotency contracts first. Replays are dispatched with deterministic Idempotency-Key headers. If a target doesn't declare idempotency support, automatic repair is strictly disabled.

What happens if a replay request times out?

OutcomeReplay treats timeouts as unknown states. Rather than blindly retrying, it executes an immediate outcome probe using the same idempotency key to inspect whether the target actually processed the record before deciding whether to retry.

How does out-of-order protection work?

If a customer downgrades to Plan A, and a delayed Plan B upgrade event arrives minutes later, replaying Plan B would overwrite the customer's intended state. OutcomeReplay checks the object's version/timestamp and marks outdated events as SUPERSEDED, preventing stale overwrites.