Zestimate endpoint

Zestimate API

Pull Zillow's Zestimate, rent Zestimate, and historical Zestimate time-series for any U.S. property by zpid or address.

Get an API keyView pricing

●50 free calls / month · no card required

curl -X POST https://api.realestateinvestingapi.com/v1/zillow \
  -H "Authorization: Bearer reia_live_••••••••" \
  -d '{"action":"zestimate","params":{"zpid":"29453621"}}'

Three endpoints

Current. Historical. Rent.

  • Current Zestimate

    Current value, low/high range, accuracy bucket, and last-updated timestamp.

    action: "zestimate"

  • Zestimate History

    Monthly Zestimate going back 60 months. Drives drift charts and trend modeling.

    action: "zestimateHistory"

  • Rent Zestimate

    Monthly rent estimate, regardless of listing status. Critical for buy-and-hold underwriting.

    action: "rentalEstimate"

History response sample

JavaScript
{
  "zpid": "29453621",
  "currency": "USD",
  "series": [
    { "date": "2026-04-01", "value": 622400 },
    { "date": "2026-03-01", "value": 619100 },
    { "date": "2026-02-01", "value": 614800 },
    { "date": "2026-01-01", "value": 609200 }
    // … 60 months of history
  ]
}

Why use this for AVM

The most-cited consumer AVM, in your stack

Every homeowner and buyer in the US has seen their property's Zestimate. It is, for better or worse, the anchor number consumers walk into a transaction with.

Investor-pricing models that ignore Zestimate are flying blind on the counterparty's expectations. The seller saw $622k on Zillow this morning. Your AVM showing $588k isn't wrong — but you need to know they're starting from a different number.

Use it as a baseline, a sanity check, or an ensemble input. Don't use it as your sole source of truth.

Pricing

One call per Zestimate lookup

  • Free

    Kick the tires. No card required.

    $0/mo

    50 calls included · hard cap

    • 50 API calls / month
    • All 30 endpoints
    • Hard cap — no overages
    • Community support
    Start free

  • Starter

    Solo wholesalers and side projects.

    $29/mo

    1,000 calls included · then $0.010/call

    • 1,000 API calls / month
    • All 30 endpoints
    • $0.01 per call after
    • Email support
    Start with Starter
  • Most popular

    Growth

    Internal tools, dashboards, lead engines.

    $99/mo

    10,000 calls included · then $0.005/call

    • 10,000 API calls / month
    • All 30 endpoints
    • $0.005 per call after
    • Priority email support
    • Webhook delivery
    Start with Growth

  • Scale

    Funded prop-tech and high-volume teams.

    $299/mo

    50,000 calls included · then $0.003/call

    • 50,000 API calls / month
    • All 30 endpoints
    • $0.003 per call after
    • 99.9% uptime SLA
    • Slack-shared support channel
    Start with Scale

All plans · 99.9% uptime SLA · OpenAPI 3.1 spec · scrape.do failover · US-based servers

FAQ

Zestimate-specific questions

Zillow publishes a national median error rate around 2.4% on-market and ~7% off-market. Accuracy varies by metro — dense metros with high turnover (Austin, Phoenix) are more accurate than rural off-market. We surface whatever Zillow returns; we don't second-guess their model.

Add Zestimate to your model today.

Get API key