How does AlterLab handle JavaScript-rendered product pages?

AlterLab's smart rendering mode executes JavaScript in a full browser environment before extracting data. This captures dynamically loaded prices, lazy-loaded images, and single-page application content that static HTTP requests miss. You control rendering mode per request — static for speed, smart for JS-heavy pages.

E-Commerce

Web Data Extraction for E-Commerce

Extract product listings, pricing, availability, and reviews from e-commerce platforms at scale to power price intelligence, catalog management, and competitive analysis.

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Data Collection Challenges in E-Commerce

Product pages rendered entirely by JavaScript require a full browser environment to extract price, availability, and variant data reliably.

Large catalogues — often millions of SKUs — demand high-throughput parallel extraction with automatic retry and deduplication.

Competitor pricing changes multiple times per day, requiring frequent polling without getting rate-limited or blocked.

Structured data fields (price, currency, ratings, stock status) are embedded inconsistently across different platform layouts.

Session-based challenges and dynamic tokens on checkout flows add complexity for automated data collection pipelines.

Common Use Cases

Automated competitor price monitoring to detect price changes and trigger dynamic repricing workflows.

Product catalog enrichment — pulling images, descriptions, and specifications from supplier or distributor pages.

Customer review aggregation for sentiment analysis and product feedback pipelines.

Inventory and stock availability tracking across multiple storefronts.

Market basket analysis by collecting frequently-bought-together and recommendation widget data.

Extracted Data Types

Product title and SKUCurrent price and currencyAvailability and stock countStar ratings and review countsProduct images and descriptionsCategory breadcrumbs

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://www.example-store.com/product/laptop-123",
    "render": "smart",
    "extract": {
      "title": "string",
      "price": "number",
      "currency": "string",
      "availability": "string",
      "rating": "number"
    }
  }'

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Frequently Asked Questions

Compliance & Responsible Use

E-commerce data extraction typically targets publicly visible product listings. Organizations should review the terms of service of each site they access and consult their legal team regarding data usage rights, especially for content protected by copyright or database rights.

AlterLab is designed for accessing 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.

Explore other industry guides

Browse all industry data extraction guides or explore use case guides for more specific technical workflows.

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