Zillow Group
Zillow Group is a leading real estate and rental marketplace that aims to make the process of buying, selling, and renting homes more streamlined and efficient. The company offers a wide range of services, including an online platform where users can search for properties, view listings, and connect with real estate agents. Zillow Group also provides tools and resources for homeowners, such as Zestimate, an automated valuation model that estimates the market value of a property.
Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.
API Evangelist profiles Zillow Group the way a machine reads it — 24 machine-readable artifacts across 17 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Zillow Group scores 41.3/100 (developing), with a separate agent-readiness read of 22/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-08 · rubric v0.20.0
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How we profile Zillow Group
Each block below is one kind of artifact we hold for Zillow Group. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 17
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Zillow Zestimate API
RESTful JSON API returning Zillow property, rental and foreclosure Zestimates for approximately 100 million US properties. Zillow Group documents it on its own developer portal ...
Zillow Public Records API
RESTful JSON API over parcel, assessment and transaction records covering roughly 148 million properties across about 3,200 US counties, with around 15 years of history. Documen...
Zillow Group MLS Listings API
RESTful JSON listing API serving MLS and broker data normalized to the RESO Data Dictionary standard. Documented by Zillow Group and served through the Bridge platform, a Zillow...
Zillow Reviews API
Self-serve API for MLS and broker partners to be notified when a prospect creates a review, retrieve prospect reviews in bulk, and respond to them. Access tokens are issued from...
Zillow Agent Reviews API
Web-service API returning Zillow agent review data as JSON from URI query-string requests, authenticated with an API key issued on the Bridge dashboard. Governed by the Zillow D...
Mortech Rate Cloud API
Read-only mortgage pricing API from Mortech, a Zillow Group company, allowing online lead generators to submit loan criteria over HTTP POST and receive lender pricing back as JS...
Mortech Prospect Sync API
Read/write API from Mortech, a Zillow Group company, for sending and receiving updates on pricing activity for every prospect in the Mortech system. Requests are HTTP POST and r...
Mortech Prospect Trigger API
Mortech prospect trigger API, part of the Zillow Group mortgage developer program alongside Prospect Sync and Rate Cloud. Access is requested through the Zillow Group developer ...
Mortech Lead Posting API
Read/write API from Mortech, a Zillow Group company, allowing partners to submit prospect information for pricing and lead routing. Requests are HTTP POST and responses are XML,...
Mortech LOS Plug-In Integration API
Integration API from Mortech, a Zillow Group company, for connecting loan origination systems to Mortech pricing. Listed on the Zillow Group mortgage developer program with a re...
Zillow Lender Reviews API
API for accessing Zillow lender review data, listed under the Zillow Group mortgage developer program. Access is requested through the Zillow Group developer portal; no base URL...
Zillow Get Current Rates API
API for retrieving current mortgage rate data, listed under the Zillow Group mortgage developer program. Access is requested through the Zillow Group developer portal; no base U...
Zillow Rentals Lead API
Outbound webhook API that delivers Zillow Rentals lead information to a customer-supplied endpoint as URL-encoded HTTP POST callbacks. Zillow Group states the data format is fix...
Zillow Rentals Feed Integrations
Rental listing feed ingestion for property managers and rental software partners, documented under the Zillow Group rentals developer program. A feed-delivery integration rather...
dotloop Transaction Management API
RESTful JSON CRUD API for real-estate transaction management - loops, loop details, folders, documents, participants, tasks, activities, contacts and loop templates - secured wi...
Zillow Real Estate Metrics
Zillow housing market metrics - median home values, rents and inventory - published from the national level down to the neighborhood level. Despite being listed as an API on the...
Zillow Neighborhood Data
Aggregate neighborhood-level housing statistics from Zillow, listed on the Zillow Group developer portal but delivered as free CSV downloads through the Zillow Research data por...
Scroll within the panel for all 17 ·
Pricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Zillow Group Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Zillow Group Finops
FINOPSEvent Specifications 1
Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Zillow Group Webhooks
ASYNCAPISecurity Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for Zillow Group — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 1
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 4
Pagination, idempotency, versioning, errors, and events
Build 2
SDKs, sample code, and the tooling you integrate with
Access & Security 4
Authentication, authorization, and security posture
Operate 2
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
← All providers · Data indexed from github.com/api-evangelist/zillow-group · machine-readable index on apis.io
This is an independent, third-party profile of Zillow Group, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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