# Keller Williams

**Canonical:** https://apis.io/providers/keller-williams/  
**Website:** https://www.kw.com/  
**APIs profiled:** 3

Keller Williams Realty, Inc. (KWRI) is an Austin, Texas headquartered residential real estate franchisor and the largest real estate brokerage franchise in the United States by agent count, operating more than 1,000 market centers worldwide through independently owned and operated offices. In the value chain Keller Williams sits at the brokerage and agent-platform layer, not the data-cooperative layer: it franchises brokerages, and it builds and operates KW Command, a proprietary agent operating system for lead, contact, task, listing, opportunity and marketing management, plus the KW Marketplace where third-party vendors sell integrated products to KW agents. Its API posture is real but partner-gated. Keller Williams runs a genuine Apigee-backed developer portal (DevHub) at developer.kw.com with a live gateway at partners.api.kw.com and a sandbox at sandbox.partners.api.kw.com, an OpenID Connect authorization server whose discovery document is publicly readable, and a published API License Agreement. Access is not self-serve: a developer must submit a partnership application through the "Apply to Integrate" form, be approved by KWRI, receive a DevHub account, then sign the KW API License Agreement and Terms of Use before receiving an API key and secret. Only one API — KW Worldwide Listings Search — is visible anonymously in the API catalog; the rest of the catalog (Command MC, Contact and Lead Data, Tasks, Opportunity/Deal/ Transaction Data, User/Organization/Role Information, Marketplace Subscription Management, Internal) is behind a SAML member login. On the sector's central question, Keller Williams carries no RESO posture at all: it is absent from the RESO certification directory, no RESO Web API, Data Dictionary, OData $metadata or Universal Property Identifier reference appears anywhere in its developer portal or specification, and its own listings spec states in its description that the service "is not a substitution for or tied to any Multiple Listings Services database records." This is a brokerage's own listing and CRM data behind a commercial partner agreement, not licensed MLS data behind a certified standard.

## Kin Score — 40.8 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 40.8).

| Facet | Score |
|---|---|
| Discoverability | 92.6 |
| Contract Quality | 62.9 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 26.3 |
| Developer Ergonomics | 16.1 |
| Commercial Clarity | 23.7 |
| Access Clarity | 23.7 |

Regulatory layer — **Securities & Market Data**: 51.7 (matched via weak_tags).

## Agent readiness — 35.7 (agent-ready)

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

## APIs (3)

- **KW Worldwide Listings Search API** — The only Keller Williams API whose specification is published anonymously in the DevHub API catalog. The KW Worldwide Listings service returns Keller Williams Listing Service (K...
- **KW Partner Identity API (OpenID Connect)** — Keller Williams uses OpenID Connect on top of OAuth 2.0 to grant a partner application access to an individual KW user's Command data. The authorization server at partners.api.k...
- **KW Marketplace Subscription & Metered Billing API** — The partner-facing surface behind the KW Marketplace, where vendors sell products to Keller Williams agents. Keller Williams pushes subscription lifecycle events — subscription ...

## MCP servers (1)

- **Keller Williams MCP Server**

## Agentic access (1)

- **Keller Williams Agentic Access** — 7 operations · 3 acting

## Security (2)

- **Keller Williams Authentication** — apiKey/http/oauth2/openIdConnect · 4 schemes
- **Keller Williams Domain Security** — TLSv1.3 · DNSSEC · DMARC

## Tags

Real-Estate, United States, Residential Real Estate, Brokerage, Franchise, Property Listings, PropTech, Agent Platform, CRM, Partner APIs, Marketplace, Austin Texas

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