Website Monitoring API
Detect content changes, track updates, and monitor website availability by scheduling recurring data extractions and comparing results over time.
How It Works
Baseline the target page
Make an initial request to capture the current state of the content you want to monitor.
Schedule recurring checks
Trigger API calls on your preferred schedule — hourly, daily, or weekly — to capture the latest page state.
Diff and alert
Compare extractions programmatically. Trigger alerts or workflows when target fields change.
Quick Start
curl -X POST https://alterlab.io/api/v1/scrape \
-H "X-API-Key: YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"url": "https://status.example.com/",
"extract": {
"status": "string",
"last_updated": "string",
"incidents": "string[]"
}
}'Need an API key? Sign up free — no credit card required.
Related Data Extraction Guides
Related Use Cases
Frequently Asked Questions
Responsible Use
AlterLab is designed for extracting publicly available data. Always review the terms of service for any website you access, respect robots.txt directives, and ensure your use case complies with applicable laws in your jurisdiction.
Your first scrape.
Sixty seconds.
$1 free balance. No credit card. No SDK.
Just a POST request.
No credit card required · Up to 5,000 free scrapes · Balance never expire