SILENT DRIFT, NOT AN OUTAGE

ContractSense learns how your partners' APIs and webhooks actually behave in production, then flags the moment behavior drifts from the contract, before the drift reaches your database.

See the anomaly view →

Documented API schemas cover roughly 40% of actual integration behavior: field co-occurrence, event ordering, and retry semantics are almost never in the docs. Source: business case research, not a ContractSense measurement.

ANOMALY Stripe Webhooks · transaction_id
detected 90m ago
payment_intent.succeeded: field presence changed against learned baseline
{
"event": "payment_intent.succeeded",
- "transaction_id": "txn_4f8a2b91c", // baseline: required
+ "transaction_id": null, // null in 15.4% of events
"status": "succeeded",
}
15.4%
events affected
2,884
transactions
90 min
since drift began
Recommended fix

transaction_id is being omitted on a subset of succeeded events. Add a null-check before reconciliation runs, and confirm with Stripe whether this is an intentional schema change.

THE BLIND SPOT

Every tool in your stack watches something different. Nobody watches this.

Observability catches errors and latency. Contract testing catches schema breaks before deploy. Neither one learns what a partner's API actually does once it's live in your production traffic.

Datadog / New Relic
CatchesErrors, latency spikes, infrastructure health
MissesA status field that quietly starts meaning something different
Pact / PactFlow
CatchesSchema breaks between services, before deployment
MissesBehavior your own team doesn't control, drifting after launch
ContractSense
LearnsThe real, undocumented behavioral contract from production traffic
CatchesField renames, ordering shifts, and status drift, the moment they start

Every third-party integration, watched continuously.

A live baseline for each partner, not a static spec, updated from what actually crosses the wire.

14
Integrations monitored
3/24h
Anomalies detected
41m avg
Mean time to detection
integration_health.overview baseline refreshed 6m ago
Stripe Webhooks
payments · webhook
1
critical anomaly
baseline 4d old
Shopify GraphQL API
commerce · rest+gql
2
warnings
baseline 1d old
EDI 834 Feeds
benefits · edi
0
nominal
baseline 12h old
Plaid Transactions
fintech · rest
0
nominal
baseline 2d old
Twilio SMS
messaging · rest
0
nominal
baseline 9h old
FedEx Ship Tracking
logistics · rest
1
warning
baseline 3d old
HOW IT WORKS

Learn the real contract, then watch for the moment it breaks.

01

Observe production traffic

Read-only ingestion from your webhook and API traffic, no changes to partner integrations required.

02

Learn the behavioral baseline

Field co-occurrence, event ordering, retry semantics, status meanings, the 60% no schema documents.

03

Detect drift as it happens

Every deviation from the learned baseline is scored, deduplicated, and ranked by transaction impact.

04

Alert with a fix, not just a flag

PagerDuty and OpsGenie routing, plus a plain-English recommendation your team can act on immediately.

DORA-READY

Turn manual audit evidence into a standing record.

DORA requires continuous monitoring of third-party ICT provider behavior. ContractSense's anomaly log doubles as the evidence trail, without a spreadsheet built the week before the audit.

ART. 6

Operational risk management: a continuous, timestamped record of third-party behavioral risk, not a point-in-time review.

ART. 17

Incident reporting: anomaly detail, affected transaction counts, and detection time, ready to attach to a filing.

PRICING

Priced against what a silent failure already costs you.

Starter
$6,000 /yr
For one team watching its highest-risk partner integrations.
  • Up to 5 integrations monitored
  • Behavioral baseline learning
  • Email + Slack alerting
  • 30-day anomaly history
Enterprise
$24,000 /yr+
For regulated or multi-region integration surfaces.
  • Unlimited integrations
  • SSO, audit log, custom retention
  • Dedicated onboarding
  • Compliance reporting workspace

The business case's own estimate: teams in this range report $126k–$168k a year in manual integration firefighting, plus tool sprawl, against a $6k–$24k ContractSense subscription. That's a planning estimate, not a result we've measured for a live customer yet.

Questions engineers actually ask

How is this different from Datadog?

Datadog watches whether requests succeed and how fast. It stays green when a field silently changes meaning inside a 200 response. ContractSense watches the shape and meaning of the data itself.

How is this different from Pact or PactFlow?

Contract testing verifies a written contract before you deploy. It can't see a partner change their production behavior six weeks later without telling you. ContractSense learns from what's actually happening, continuously.

Do our partners need to change anything?

No. ContractSense reads from your existing webhook and API traffic. There's nothing to ask a partner to install, configure, or agree to.

What does onboarding look like?

Point ContractSense at an integration's traffic and it starts learning immediately. A stable baseline typically forms within the first few days of representative traffic, then every deviation gets scored against it.

LIMITED PILOT SLOTS

Find out what your monitoring has been missing.