Marketplace Listings API
Collect product listings, seller profiles, pricing history, and availability data from public online marketplace pages to build inventory intelligence, arbitrage detection, and competitive pricing tools.
How It Works
Target category or search pages
Request marketplace search results or category pages to discover listings at scale.
Extract listing details
Pull product title, price, seller, condition, shipping options, and listing age from each result.
Monitor and analyze
Track price changes, new listings, and sold items to build market pricing models.
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://marketplace.example.com/search?q=vintage+camera",
"extract": {
"listings": [{
"title": "string",
"price": "number",
"seller_rating": "number",
"condition": "string",
"bids": "number"
}]
}
}'Need an API key? — no credit card required.
Related Data Extraction Guides
Related Use Cases
Frequently Asked Questions
What data can I extract from marketplace listings?
Product title, asking price, seller username and feedback rating, item condition, shipping cost, listing date, number of bids (auction format), and sold price history.
How do I track sold listing prices on marketplaces?
Many marketplaces expose completed or sold listing archives. Extract these to build actual transaction price datasets — more accurate than asking prices for market valuation.
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