# Zillow Group > Zillow Group is a US residential real-estate technology company whose brands include > Zillow, Trulia, StreetEasy, HotPads, Zillow Home Loans, Zillow Rentals, dotloop, Mortech > and Bridge Interactive. Its developer surface is a directory at > https://www.zillowgroup.com/developers/ covering seven programs and seventeen APIs. Every > one of them is gated by a request-access form or an invite-only data agreement, and none > publishes a machine-readable contract: there is no OpenAPI, no AsyncAPI, no GraphQL SDL, > no MCP server and no agent card anywhere on the surface. The public, self-serve Zillow Web > Services API (Zestimate, GetSearchResults) was retired in 2021 and has not been replaced. Generated by the API Evangelist enrichment pipeline on 2026-08-28. This file is authored by API Evangelist from probes of Zillow Group's own public surface; Zillow Group does not serve an llms.txt of its own (https://www.zillowgroup.com/llms.txt returned 404 on 2026-08-28). ## Developer programs - [Zillow Group Developers](https://www.zillowgroup.com/developers/): portal index for all seventeen APIs - [Agents](https://www.zillowgroup.com/developers/agents/): agent review data - [MLS & Broker Listings](https://www.zillowgroup.com/developers/mls-broker-data/): RESO-normalized listing and review data - [Mortgage](https://www.zillowgroup.com/developers/mortgage/): Mortech pricing, prospect and lead APIs - [Public Data](https://www.zillowgroup.com/developers/public-data/): parcel, assessment and market-metric data - [Rentals](https://www.zillowgroup.com/developers/rentals/): rental feed ingestion and lead delivery - [Transactions](https://www.zillowgroup.com/developers/transactions/): dotloop transaction management - [Zestimate](https://www.zillowgroup.com/developers/zestimate/): automated valuation estimates ## APIs - [Zestimates API](https://www.zillowgroup.com/developers/api/zestimate/zestimates-api/): RESTful JSON valuation estimates for ~100M US properties; Bridge access token; invite-only - [Public Records API](https://www.zillowgroup.com/developers/api/public-data/public-records-api/): parcel, assessment and transaction records across ~3,200 US counties; Bridge access token - [MLS Listings API](https://www.zillowgroup.com/developers/api/mls-broker-data/mls-listings/): RESO Data Dictionary normalized listings; granted through MLS partners - [Reviews API](https://www.zillowgroup.com/developers/api/mls-broker-data/reviews-api/): read and respond to prospect reviews; self-serve on the Bridge dashboard - [Zillow Agent Reviews API](https://www.zillowgroup.com/developers/api/agents/agent-reviews/): agent review data; API key, JSON - [Rate Cloud API](https://www.zillowgroup.com/developers/api/mortgage/rate-cloud-api/): Mortech lender pricing; read-only, HTTP POST, JSON - [Prospect Sync API](https://www.zillowgroup.com/developers/api/mortgage/prospect-sync-api/): Mortech prospect pricing updates; read/write, HTTP POST, XML - [Prospect Trigger API](https://www.zillowgroup.com/developers/api/mortgage/prospect-trigger-api/): Mortech prospect triggers - [Lead Posting API](https://www.zillowgroup.com/developers/api/mortgage/lead-posting-api/): submit prospects to Mortech for pricing and routing; HTTP POST, XML - [LOS Plug-In Integration API](https://www.zillowgroup.com/developers/api/mortgage/los-plug-in-integration-api/): loan-origination-system integration - [Lender Reviews API](https://www.zillowgroup.com/developers/api/mortgage/zillow-lender-reviews/): Zillow lender review data - [Get Current Rates](https://www.zillowgroup.com/developers/api/mortgage/get-current-rates/): current mortgage rate data - [Rentals Lead API](https://www.zillowgroup.com/developers/api/rentals/lead-api/): URL-encoded HTTP POST lead callbacks to a customer webhook - [Rentals Feed Integrations](https://www.zillowgroup.com/developers/api/rentals/rentals-feed-integrations/): rental listing feed ingestion - [Transaction Management API](https://www.zillowgroup.com/developers/api/transactions/transaction-management/): dotloop Public API v2; OAuth 2.0 three-legged, JSON REST - [Real Estate Metrics](https://www.zillowgroup.com/developers/api/public-data/real-estate-metrics/): CSV download, not a keyed API - [Neighborhood Data](https://www.zillowgroup.com/developers/api/public-data/neighborhood-data/): CSV download, not a keyed API ## Reference documentation - [Bridge platform docs](https://bridgedataoutput.com/docs/platform): reference for the Zestimate, Public Records, MLS Listings and Reviews APIs - [Bridge RESO Web API explorer](https://bridgedataoutput.com/docs/explorer/reso-web-api): OData-based RESO Web API surface - [dotloop Public API v2 guide](https://dotloop.github.io/public-api/): the only complete, public, self-describing API reference on the Zillow Group surface - [Rentals Lead API guide (PDF)](https://s3.amazonaws.com/files.hotpads.com/+guides/Lead+API+Guide.pdf): PDF-only integration guide - [Zillow Research data](https://www.zillow.com/research/data/): free CSV housing-market datasets ## Free and open data - [Zillow Research data downloads](https://www.zillow.com/research/data/): ZHVI, rent index, inventory and other metrics, national to neighborhood level, no key required ## Security - [Zillow Security Disclosure](https://www.zillow.com/corporate/security-disclosure/): responsible disclosure policy with Bugcrowd-backed triage and safe harbour ## Open source - [github.com/zillow](https://github.com/zillow): Zillow's open-source organization. Note that none of these packages is a client SDK for a Zillow Group API. - [quantile-forest](https://pypi.org/project/quantile-forest/): quantile regression forests for scikit-learn - [luminaire](https://pypi.org/project/luminaire/): ML-driven time-series anomaly monitoring - [zkafka](https://pkg.go.dev/github.com/zillow/zkafka): Go library for stateless Kafka message processing ## What is NOT available - No OpenAPI, Swagger, GraphQL SDL or AsyncAPI document is published on any Zillow Group host. - No client SDK is published for any Zillow Group API, in any language, in any registry. - No MCP server exposes Zillow Group data. The one MCP package Zillow published, `auto-mobile`, is archived mobile-test tooling. - No A2A agent card is served at /.well-known/agent-card.json or /.well-known/agent.json on any host. - No /.well-known/ discovery documents of any kind are served — security.txt, openid-configuration, oauth-authorization-server and api-catalog were all probed on seven hosts on 2026-08-28. - No published rate limits, no published pricing or plans, no status page, no changelog and no deprecation policy. - No sandbox, test mode or test credentials for any API. ## API Evangelist artifacts - [apis.yml](https://raw.githubusercontent.com/api-evangelist/zillow-group/main/apis.yml) - [Authentication profile](https://raw.githubusercontent.com/api-evangelist/zillow-group/main/authentication/zillow-group-authentication.yml) - [Conventions and reversibility](https://raw.githubusercontent.com/api-evangelist/zillow-group/main/conventions/zillow-group-conventions.yml) - [Webhook surface](https://raw.githubusercontent.com/api-evangelist/zillow-group/main/asyncapi/zillow-group-webhooks.yml) - [Standards conformance](https://raw.githubusercontent.com/api-evangelist/zillow-group/main/conformance/zillow-group-conformance.yml) - [Lifecycle](https://raw.githubusercontent.com/api-evangelist/zillow-group/main/lifecycle/zillow-group-lifecycle.yml) - [Plans and pricing](https://raw.githubusercontent.com/api-evangelist/zillow-group/main/plans/zillow-group-plans-pricing.yml) - [Rate limits](https://raw.githubusercontent.com/api-evangelist/zillow-group/main/rate-limits/zillow-group-rate-limits.yml) - [Packages](https://raw.githubusercontent.com/api-evangelist/zillow-group/main/packages/zillow-group-packages.yml) - [Well-known probe](https://raw.githubusercontent.com/api-evangelist/zillow-group/main/well-known/zillow-group-well-known.yml) - [MCP posture](https://raw.githubusercontent.com/api-evangelist/zillow-group/main/mcp/zillow-group-mcp.yml) - [Vulnerability disclosure](https://raw.githubusercontent.com/api-evangelist/zillow-group/main/security/zillow-group-vulnerability-disclosure.yml) - [Domain security](https://raw.githubusercontent.com/api-evangelist/zillow-group/main/security/zillow-group-domain-security.yml) ## Related Zillow Group companies profiled separately - [Bridge Interactive](https://github.com/api-evangelist/bridge-interactive): the platform serving Zillow Group Datasets - [dotloop](https://github.com/api-evangelist/dotloop): the Transaction Management API - [Trulia](https://github.com/api-evangelist/trulia)