Web Scraping API

Price Monitoring API

Track competitor prices, detect pricing changes, and build dynamic repricing systems with structured data extraction from any e-commerce site.

2.3x/week Average price change frequency26M+ E-commerce sites tracked globally$4.5B by 2028 Pricing data market size

How It Works

1

Target product URLs

Send product page URLs to the API — supports any e-commerce platform with JavaScript rendering.

2

Extract pricing data

Receive structured price, availability, and product metadata in your response.

3

Monitor changes

Schedule recurring requests to detect price drops, stock changes, and new listings.

Quick Start

cURL
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? Sign up free — no credit card required.

Related Data Extraction Guides

Amazon Data ExtractioneBay Data ExtractionShopify Data Extraction

Related Use Cases

Price Monitoring

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.

terminal
curl -X POST https://api.alterlab.io/v1/scrape \
-H "X-API-Key: YOUR_KEY" \
-H "Content-Type: application/json" \
-d '{"url": "https://example.com", "formats": ["markdown"]}'

No credit card required · Up to 5,000 free scrapes · Balance never expire