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Zillapi

REST API for Zillow-sourced U.S. property data — 300+ fields per home in one call.
Free Tier Data & Analytics AI & Automation
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Starting Price
$5/month (1,000 credits)
Best For
Developers, Proptech Product Teams, Data Analysts, AI Agent Builders, Investors
Company Size
Solo, Small, Mid-Market
Deployment
Cloud, API
Property Types
Residential, Multifamily

About Zillapi

Zillapi is a REST API that returns Zillow-sourced U.S. property data for developers and AI agents: price, Zestimate, rent estimate, photos, schools, taxes, agent contact, and full price history — 300+ typed fields across a stated 160M+ U.S. parcels in a single call. It offers nine sub-resources (such as /zestimate, /nearby comps, and /price-history), geo search by bounding box with filters, address- or zpid-based lookups, and JSON, CSV, and NDJSON output with HMAC-signed webhooks for async jobs. The service ships an OpenAPI 3.1 spec, llms.txt files, and MCP-readiness for use with Claude, ChatGPT, Cursor, LangChain, and workflow tools like Zapier and n8n. Pricing is credit-based: a free tier with 100 credits and no card, $5/month for 1,000 credits, or $54/year for 12,000 credits, with most calls costing 1 credit per record. Zillapi states it is an independent service not affiliated with or endorsed by Zillow Group.

✓ Pros

✓Free tier with no credit card and very low published entry pricing
✓OpenAPI 3.1 spec plus AI-agent tooling (llms.txt, MCP-ready) out of the box
✓Multiple output formats and sub-resources avoid pulling full records unnecessarily
✓Failed calls are free and pricing is transparently documented per endpoint

✗ Cons

✗Independent wrapper not affiliated with Zillow — upstream data access could change
✗Residential-focused data (homes, Zestimates); limited coverage for pure commercial assets
✗Early-access product with limited track record

Who This Is For

Roles
DevelopersProptech Product TeamsData AnalystsAI Agent BuildersInvestors
Company Size
SoloSmallMid-Market
Property Types
ResidentialMultifamily

Zillapi Features

✦ Full Property Records 300+ typed fields per property: address, price, Zestimate, rent estimate, beds/baths, lot size, taxes, schools, agent contact, photos, and price history.
✦ Sub-Resources & Field Projection Nine sub-resources (zestimate, nearby comps, price history, photos, schools) and ?fields= projection to slim payloads.
✦ Geo & URL Search Bounding-box search with price/beds/baths/sqft/type filters, or paste a Zillow search URL; async jobs with signed webhooks.
✦ OpenAPI 3.1 Spec Stable v1 REST contract that drops into Postman, Cursor, and code generators.
✦ AI-Agent Ready Function-call-ready spec, llms.txt/llms-full.txt, and MCP readiness for Claude, ChatGPT, and LangChain.
✦ Multiple Output Formats JSON, CSV, and NDJSON output for pipelines including Google Sheets, BigQuery, and Snowflake.

Zillapi Pricing

Credit-based subscription with free tier Free Tier Available
Free
$0
100 credits at signup, no credit card, no top-ups.
Monthly
$5/month
1,000 credits/month; top-ups at $4 per 1,000 credits.
Annual
$54/year
12,000 credits/year released 1,000/month; top-ups at $3 per 1,000 credits.
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