# Zillow

**Canonical:** https://apis.io/providers/zillow/  
**Website:** https://www.zillow.com  
**APIs profiled:** 5

Zillow is the largest U.S. real-estate marketplace, offering home and rental listings, Zestimate home value estimates, mortgage tools, and a connected agent and lender ecosystem. Zillow Group owns Trulia, StreetEasy, HotPads, Out East, Bridge Interactive, Mortech, Showcase, and ShowingTime+. Zillow sunset its legacy public consumer APIs (Zillow Web Services, the GetSearchResults / GetZestimate / Property Details APIs and the Mortgage APIs) on September 30, 2021. Programmatic access to Zillow Group listing, broker, and lender data is now delivered through Bridge Interactive (bridgedataoutput.com) for licensed real-estate professionals and MLSs, the Zillow Tech Connect partner program for vendors, Mortech for mortgage pricing, and the Showcase listing enhancement product. This profile documents what is publicly findable on each surviving API surface.

## Kin Score — 35.0 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 35.0).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 41.5 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 26.3 |
| Developer Ergonomics | 16.7 |
| Commercial Clarity | 50.0 |
| Access Clarity | 50.0 |

Regulatory layer — **Securities & Market Data**: 33.3 (matched via weak_tags).

## Agent readiness — 15.5 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Free · Requires approval — onboarding: approval, pricing: free, trial: no (confidence: medium).

## APIs (5)

- **Zillow Web Services (Historical / Sunset)** — Zillow Web Services were the legacy public XML-based APIs from Zillow including GetSearchResults, GetZestimate, GetDeepSearchResults, GetUpdatedPropertyDetails, GetComps, GetReg...
- **Bridge Interactive API** — Bridge Interactive is Zillow Group's RESO-compliant data distribution platform for MLSs, brokers, and approved vendors. It exposes a RESO Web API (OData-based) for searching lis...
- **Zillow Tech Connect** — Zillow Tech Connect is the partner program that lets approved real-estate software vendors integrate with Zillow Premier Agent for contact, lead, and listing sync. Vendors are v...
- **Mortech API** — Mortech is Zillow Group's mortgage pricing and product eligibility engine for lenders and partners. It exposes web services for real-time rate quotes, scenario pricing, and prod...
- **Zillow Showcase** — Zillow Showcase is a premium listing enhancement product for agents and MLSs that integrates immersive media (interactive floor plans, virtual tours, AI-enhanced photography) in...

## Security (1)

- **Zillow Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Zillow Plans Pricing**

## Tags

Bridge, Brokers, IDX, Lenders, Listings, Mortgage, MLS, Real-Estate, Rentals, RESO

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/zillow/). Scores are computed from the provider's own public artifacts under a published rubric.