Zillow Market Research API
Aggregate Zillow listing data across neighborhoods and metros to power housing market research — median price trends, inventory levels, and days-on-market benchmarks — rather than tracking individual properties.
How the Zillow Market Research API Workflow Works
Market research workloads differ from single-listing tracking in scope and cadence: instead of watching one property closely, you crawl multiple search-results pages across several ZIP codes or metro areas on a weekly or monthly cadence, then aggregate the resulting listings into medians and distributions yourself. AlterLab returns each listing's raw fields (price, sqft, days on market, property type); the aggregation — median price per sqft, months-of-inventory, or price-reduction rate — happens in your own analytics pipeline downstream of the scrape.
Recommended Tier & Cost
Same rendering requirement as single-listing extraction — search-results pages and individual listings both need JavaScript execution to expose price, sqft, and days-on-market fields.
Sample Output
{
"search_area": "Austin, TX 78701",
"listings_found": 84,
"sample_listing": {
"zpid": "2126956255",
"price": 549000,
"sqft": 1840,
"price_per_sqft": 298.4,
"days_on_market": 12,
"property_type": "Single Family"
},
"crawl_date": "2026-07-10"
}Need an API key? — no credit card required.
Responsible Use
AlterLab is designed for extracting publicly available data. Always review the terms of service for Zillow, respect robots.txt directives, and ensure your use case complies with applicable laws in your jurisdiction. Do not use this service to access non-public, authenticated, or personally identifiable data without appropriate authorization.
Quick Start
# Always verify Zillow's robots.txt and terms of service before extracting data.
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.zillow.com/homedetails/123-main-st/12345_zpid/",
"advanced": { "render_js": true }
}'Frequently Asked Questions
Can I get aggregate market statistics directly from the API?
AlterLab returns per-listing structured data, not pre-aggregated statistics — you compute medians, price-per-sqft, or inventory trends from the raw listings your crawl job returns.
How many ZIP codes can I track for a market research project?
There's no fixed limit — submit one crawl job per search area (ZIP code, neighborhood, or metro boundary) on whatever cadence your research needs, from weekly to monthly.
Does this include historical price data, or just current listings?
Each listing includes its available price_history entries (list, reductions, relisting) as shown on the Zillow page itself. Building your own longer historical time series requires re-scraping the same listings over time and storing the results.
Related Guides
Developer Scraping Resources
How to Scrape Zillow Data: Complete Guide
Step-by-step tutorial with Python and Node.js code examples, structured extraction, and cost breakdown for Zillow scraping.
How to Handle Bot Protection Challenges
All 6 detection layers explained: TLS fingerprinting, JS challenges, Turnstile, and more.
JavaScript Rendering API
Full browser rendering for SPAs, React, and dynamic content.
Python Web Scraping API
pip install alterlab — async-ready Python SDK with 5,000 free scrapes.
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