Smart Monitoring & Notificationsfor APIs and Web Resources
Automatically detect changes in API or website content, and get notified via your favorite channels. Create flexible monitoring rules for the resources that matter most.
Get Telegram alert when your partner API changes response.
Key Features
Everything you need to monitor, process, and respond to data changes in your systems
Data Change Monitoring
Track JSON/API responses and get alerts when values change.
Event Processing Pipelines
Create custom processing workflows with modular steps. Filter, transform, and route events exactly how you need them.
Multi-Channel Notifications
Send notifications via Email, Telegram, Slack, Twitter, SMS, and Push notifications. Never miss important changes.
Flexible Conditions & Filters
Define flexible conditions and filters for your alerts without custom code, using clear and maintainable rules.
Visual Pipeline Editor
Build complex workflows with our intuitive drag-and-drop interface. See your processing logic in real-time.
Real-time Monitoring
Track event processing status, view logs, and monitor system performance with comprehensive dashboards.
How It Works
Get started with NotifyWhenEvent in four simple steps
Set Up Monitoring
Configure your resources - APIs, webhooks, or web pages. Define which JSON fields or responses you want to track.
Create Processing Pipeline
Design your event processing workflow with our visual editor. Add filters and routing rules to control when and where alerts are sent. For example, send a Telegram alert only when an order status becomes 'failed'.
Configure Notifications
Choose your notification channels and customize message templates. Set up Email, Slack, Telegram, and more.
Monitor & Receive Alerts
Sit back and let NotifyWhenEvent do the work. Get instant notifications when changes occur in your monitored resources.
Why We Built NotifyWhenEvent
We built NotifyWhenEvent to solve real monitoring problems we faced ourselves.
Manually checking APIs, webhooks, and web pages for important changes was slow, error-prone, and easy to forget.
After maintaining fragile ad-hoc scripts for too long, we decided to create a focused tool that reliably detects changes, routes events through clear workflows, and sends alerts through the channels we actually use every day.
Plans & Pricing (Beta)
Right now only the Free plan is available. Paid plans are coming soon — pricing and limits may change during beta.
Free
Free plan for getting started
- ✓Up to 3 monitored resources
- ✓Up to 6 handlers
- ✓Up to 2 notification channels
- ✓Up to 2 webhook sources
- ✓Up to 64 KB per webhook payload
- ✓10 requests / 60s per webhook
No credit card required • Limited time offer • Terms and conditions apply
Have questions? Contact us →