API-first contract drift monitoring

Detect API drift before it breaks your integrations.

DriftMonitor continuously compares API responses against a known baseline and surfaces structural changes that ordinary uptime checks can miss.

Open API docs Check API status

DriftMonitor is currently API-first. The focus is narrow: detect meaningful contract changes, preserve the evidence, and alert engineering teams before downstream failures become incidents.

Baseline comparisonBreaking change detectionAuditable historyAlert delivery

Contract comparison

payments-api / latest check

BREAKING

Baseline

HTTP 200 OK

{
  "id": 123,
  "status": "paid",
  "amount": 49.90
}

Current response

HTTP 200 OK

{
  "id": 123,
  "status": "paid",
  "amount": "49.90"
}

amountchanged typenumbertostring

The endpoint is still up. The contract is not the same.

Why this exists

200 OK can still hide a broken contract.

Traditional availability monitoring tells you whether an endpoint responds. DriftMonitor focuses on a different question: is the response still shaped the way your integration expects?

The endpoint can stay healthy

A provider can keep returning 200 OK while changing a field, type, or nested response your integration depends on.

The failure appears downstream

The first visible symptom may be a broken workflow, corrupted data, or a customer report instead of an uptime alert.

Contract drift needs a different signal

DriftMonitor compares real API responses against a known baseline so structural changes become visible earlier.

How it works

Baseline, compare, alert.

The product stays deliberately close to the contract. No dashboard is required to understand the core workflow.

Step 1

Create a monitor

Point DriftMonitor at an external endpoint your service depends on and define the monitoring cadence.

Step 2

Capture the baseline

A healthy response becomes the reference contract used for future comparisons.

Step 3

Detect and alert on drift

Later responses are compared with the baseline and meaningful changes are classified, recorded, and routed to alert channels.

Current API capabilities

Focused on the monitoring signal, not the surface around it.

DriftMonitor is an alpha product, but the backend already covers the core lifecycle needed to evaluate contract drift on a real API dependency.

Response-structure snapshots and baseline comparison

Breaking and warning-level drift classification

Independent production and staging baselines

Execution history for audited comparisons

Webhook, Slack, Discord, and email alert paths

Signed webhooks, retries, deduplication, and dead-letter visibility

Who it is for

Teams that own integration reliability.

Backend and platform teams relying on third-party APIs
SaaS products with payment, messaging, AI, logistics, or partner integrations
Teams where a silent payload change can break downstream behavior before an outage is visible

What it is not

Not another generic uptime dashboard.

DriftMonitor is not trying to replace availability monitoring, logs, or full observability platforms. It covers the gap between “the endpoint responded” and “the contract is still safe for my code.”

Try the API

Start with one endpoint your service already depends on.

Use the Swagger documentation to inspect the current API, authentication flow, monitor lifecycle, and available operations.

Open API docs