Price Monitoring API
Track competitor prices, detect pricing changes, and build dynamic repricing systems with structured data extraction from any e-commerce site.
How It Works
Target product URLs
Send product page URLs to the API — supports any e-commerce platform with JavaScript rendering.
Extract pricing data
Receive structured price, availability, and product metadata in your response.
Monitor changes
Schedule recurring requests to detect price drops, stock changes, and new listings.
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://example-store.com/product/123",
"extract": {
"price": "number",
"currency": "string",
"availability": "string",
"title": "string"
}
}'Need an API key? — no credit card required.
Related Data Extraction Guides
Price Monitoring for a Specific Site
Related Use Cases
Frequently Asked Questions
How often can I check prices?
You can schedule requests as frequently as needed — from every minute to daily. Our API handles rate limiting and retries automatically so you get reliable data without managing infrastructure.
Does the API handle JavaScript-rendered prices?
Yes. AlterLab renders JavaScript by default for advanced requests, capturing dynamically loaded prices, lazy-loaded content, and single-page application data that traditional scrapers miss.
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.
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Pricing
From $0.0002/request. No subscriptions. Balance never expires.
Your first scrape.
Sixty seconds.
$1 free credit — up to 5,000 scrapes. No credit card.
Just a POST request.
No credit card required · $1 free credit, up to 5,000 scrapes · Balance never expires