Stop finding out about API changes
from your users.
Schema drift, SSL expirations, slow responses, outages — FlareCanary watches your third-party APIs around the clock and alerts your team before your users notice.
Watching the APIs your code depends on
You've been here before.
A provider ships a breaking change. A certificate expires. Response times creep up. The changelog says nothing. You find out at 2 AM when your integration stops working and PagerDuty lights up.
APIs change without warning
A field gets renamed. A type flips from object to array. An SSL cert expires over a long weekend. None of it was in the release notes.
Monitoring is fragmented
Uptime checks in one tool, response validation in another, SSL alerts in a third. You're stitching together a patchwork that still has blind spots.
Your users find out first
The first signal is a customer ticket, a spike in errors, or an on-call page. By then the damage is done and you're debugging blind.
Set up in under a minute. We handle the rest.
Add your endpoints
Paste a URL, add auth headers if needed, pick a check interval. No SDK, no agent, no YAML config.
We start watching
FlareCanary captures the response schema, tracks uptime and response times, checks SSL certificates, and establishes your baselines.
Get alerted on changes
Schema drift, slow responses, status code changes, expiring certificates — you get a clear alert the moment something shifts.
This is what a breaking change looks like — before it breaks anything.
Every schema diff shows exactly what moved: which fields changed, what type shifted, and whether it's informational or likely to break your integration. No log-diving. No guesswork.
API Schema Drift Detection
The thing no other monitoring tool does. FlareCanary infers the structural schema of every JSON response, compares it against a stored baseline, and catches changes the moment they ship.
Structural Schema Inference
Automatically builds a schema from raw JSON responses. Handles nested objects, arrays, and all JSON types — no OpenAPI spec required.
Severity Classification
Not every change is an emergency. Diffs are classified as info (new fields), warning (type changes), or breaking (removed fields) so you triage the right ones first.
Deep Nested Comparison
Recursively compares nested objects and array item schemas. Reports changes with dot-notation paths like data.user.email — down to the exact field.
Drift Lifecycle
Every drift event has a lifecycle: new, acknowledged, resolved. Your team can triage changes together without duplicate alert noise.
Flexible Alerting That Reaches Your Team
Route alerts where they matter. Set up global destinations or per-endpoint rules. Get notified by email, webhook, or both.
Schema Drift Alerts
Get notified the moment a response schema changes. Alerts include severity, affected fields, and a diff — not just ‘something changed.’
Metric Alert Rules
Set thresholds on response time, status codes, SSL expiry, response size, and availability. Rules fire only after consecutive breaches to avoid noise.
Email & Webhook Destinations
Send alerts to any email address or POST to any webhook URL. Route breaking changes to the team that owns the integration.
Cooldown & Resolution
Configurable cooldown periods prevent alert fatigue. Optionally get a ‘resolved’ notification when conditions heal.
SSL Certificate Monitoring
Never be surprised by an expired certificate again. FlareCanary tracks SSL status on every HTTPS endpoint you monitor — included free on every plan.
Expiry Tracking
See days until expiry at a glance. Certificates are classified as valid, warning (7–30 days), critical (<7 days), or expired.
Issuer & Status Details
Know who issued the certificate, when it was last checked, and its full status — right on the endpoint detail page.
Metric Alerting
Set alert rules on SSL expiry days. Get notified when certificates enter warning or critical windows — not after they expire.
Public Status Pages
Share the health of your API dependencies with your team or your customers. One page, always up to date, no manual updates needed.
Per-Endpoint Status
Each endpoint shows operational, degraded, or down status based on recent polls. Plus 30-day uptime percentage and response times.
Overall Health View
A single status derived from your worst endpoint. Your stakeholders see the big picture without digging into individual APIs.
SSL & Uptime Included
Status pages show SSL certificate status and a 30-day uptime bar for every endpoint — the full health picture in one view.
Custom Branding
Set a custom description for your status page. Accessible at a clean URL based on your org slug.
Teams & Role-Based Access
One dashboard for every API your team depends on. Invite members, assign roles, organize endpoints into folders — all scoped per org.
Multi-Org Support
Create multiple orgs for different teams or clients. Switch between them instantly. Every org has its own endpoints, alerts, and members.
Viewer / Editor / Admin Roles
Viewers browse and acknowledge alerts. Editors manage endpoints and rules. Admins control billing, members, and org settings.
Folders & Tags
Group endpoints into color-coded folders. Add tags for search and filtering. Keep hundreds of endpoints organized.
REST API & CI/CD
Per-user API keys and a full REST API. Wire FlareCanary into your deployment pipeline or existing monitoring stack.
And everything else you'd expect.
FlareCanary isn't just drift detection. It's a full API monitoring platform built for teams who depend on third-party services.
Response Time Charts
Interactive charts with 24h, 7d, and 30d views. See min, max, p50, p95, and p99 latency at a glance.
Status Code Tracking
Track status code distribution, transitions, and redirect chains. Spot when an endpoint starts returning unexpected codes.
30-Day Uptime Bars
GitHub-style daily uptime visualization. See availability trends and spot reliability issues before they become incidents.
Endpoint Library
Browse a curated collection of popular public APIs. One click to start monitoring Stripe, GitHub, Twilio, and more.
Smart Deduplication
Multiple teams monitoring the same URL share a single poll. Efficient by default, with drift events fanned out to every subscriber.
Configurable Polling
From once a day to every 15 minutes, depending on your plan. Each endpoint gets its own schedule.
Free to start. Simple to scale.
Monitor up to 3 endpoints free. Upgrade when your API surface grows.
- 3 endpoints
- Daily checks
- Schema drift alerts
- SSL monitoring
- Email alerts
- 7-day history
- 25 endpoints
- Hourly checks
- Metric alert rules
- Status pages
- Email & webhook alerts
- 30-day history
- 100 endpoints
- 15-min checks
- Metric alert rules
- Status pages
- Email & webhook alerts
- 90-day history
Team Plans
Shared monitoring across your org — one dashboard for every API your team depends on.
- 250 endpoints
- 15-minute checks
- All alert types
- Status pages
- 180-day history
- Up to 5 seats
- 1,000 endpoints
- 15-minute checks
- All alert types
- Status pages
- 365-day history
- Unlimited seats
All plans include SSL monitoring, schema drift detection, and email alerts. Metric alert rules and status pages available on Starter and above.
Coming Soon: Power Add-ons
Deeper automation built on top of your monitoring data.
A transformation engine for API inputs and outputs. Tweaker lets you manipulate schemas in-flight — reshaping the APIs you're given to match the exact shape your system requires.
Your API emergency response team. Fixer detects schema drift and instantly, intelligently adjusts the shape of the schema to match what your system expects — keeping integrations live while you catch up.
Stop finding out about API changes from your users.
Add your first endpoint in under a minute. Free plan, no credit card.
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