Redfin's rich sold-price and price-history data is gold for comps and valuation. Its main gate is one thing — datacenter IPs — and here's how to get past it cleanly.
Redfin's main defense is blocking datacenter IP ranges — lighter than Zillow's Imperva stack. The unlock is simply arriving on a residential or mobile IP with a real browser; from there you can collect public listing, price-history, and sold comps data. There's no broad public API, so this (or a licensed RESO/IDX feed) is the route. Respect terms and law.
Compared with Zillow's layered Imperva challenges, Redfin leans mostly on IP reputation: it drops datacenter ASNs but is far more permissive once you arrive on a residential or mobile address. That single fact is why "Redfin keeps blocking me" almost always traces back to a hosting IP — the fix is an IP-type change, not a fingerprint overhaul. (Still match a real browser; the consistency principle from the fingerprinting stack still applies.)
Redfin's standout value is sold-price history — the backbone of automated valuation and comps. Collected at scale across markets, it's a strong dataset for investors and proptech.
Generally yes. Redfin's primary defense is blocking datacenter IP ranges rather than the heavy multi-layer challenge stack Zillow runs through Imperva. That means the main unlock is simply arriving on a residential or mobile IP; a real browser plus a clean IP usually gets you clean access to listing, price-history, and sold data.
Publicly displayed fields: list price, beds/baths/sqft, property type, status, days on market, price history, and recently-sold comparables. Redfin's sold-price coverage makes it especially useful for valuation and comps work. Avoid collecting any personal data and respect the site's terms.
There is no broad public property-data API for general scraping use. Teams that need structured data either license MLS/IDX feeds via the RESO Web API where they qualify, or collect public pages with browser automation over residential/mobile IPs within the site's terms and applicable law.
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