Marriott International
Marriott International is the world's largest hotel group by room count, headquartered in Bethesda, Maryland, United States, operating and franchising roughly thirty brands from The Ritz-Carlton, St. Regis and W through Marriott Hotels, Sheraton, Westin and Courtyard down to Fairfield, Moxy and StudioRes, plus the Homes & Villas by Marriott Bonvoy home-rental marketplace and the Marriott Bonvoy loyalty program. It sits on the supply side of the travel distribution chain: it publishes rates and availability into every major global distribution system — Marriott's own travel-agent site states it "participates in the following GDS: Amadeus, Sabre, Travelport (Apollo/Galileo, and Worldspan)" — sells through the OTAs, connects short-term-rental supply through a channel-connectivity partner program, and spends heavily to pull demand back to direct booking on Marriott.com and the Bonvoy app. Its API posture is closed. A Broadcom Layer7 developer portal exists at devportalprod.marriott.com and returns HTTP 200, but its anonymous API catalog is literally empty and the portal's own home content returns HTTP 401 — there is no self-serve signup, no public API reference, no published rates/availability/booking API, no sandbox, no SDK, no changelog and no exit path. The only Marriott OpenAPI documents that can be read without a contract are eight internal and partner-facing specifications left publicly readable on SwaggerHub under the "marriott-api" owner; six are mirrored here verbatim as evidence. Everything a developer would actually want is behind a partner relationship, a travel-agent registration, or a GDS or channel-manager contract.
Marriott International publishes 12 APIs on the APIs.io network, including Actuator API, Auth API, Data API, and 9 more. Tagged areas include Travel, United States, Hospitality, Hotels, and Booking.
Marriott International’s developer surface includes authentication, support, engineering blog, signup flow, and 36 more developer resources.
Kin Score
APIs 12
Individual APIs this provider publishes, each with its own machine-readable definition.
Marriott International Actuator API
The Actuator API from Marriott International — 1 operation(s) for actuator.
Marriott International Auth API
Authorization related endpoints.
Marriott International Data API
The Data API from Marriott International — 1 operation(s) for data.
Marriott International Data Collection Event API
The Data Collection Event API from Marriott International — 1 operation(s) for data collection event.
Marriott International FreedomPay Freeway Service API
The FreedomPay Freeway Service API from Marriott International — 1 operation(s) for freedompay freeway service.
Marriott International Guest Validation API
Validates a given RN/LN against a property in cloud PMS.
Marriott International Internet Purchase Update API
Updates the user internet plan purchase in cloud PMS.
Marriott International Landing Page API
Provides the landing page URL based on request inputs.
Marriott International Loyalty API
The Loyalty API from Marriott International — 1 operation(s) for loyalty.
Marriott International Post Preview Submit API
The PostPreviewSubmit API from Marriott International — 1 operation(s) for postpreviewsubmit.
Marriott International Retrieve Configs Monitored By Config Watcher API
The RetrieveConfigsMonitoredByConfigWatcher API from Marriott International — 1 operation(s) for retrieveconfigsmonitoredbyconfigwatcher.
Marriott International Status API
The Status API from Marriott International — 1 operation(s) for status.
Scroll for all 12
Open Collections 6
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
commerce-payment-processor
OPEN COLLECTIONData Collection API
OPEN COLLECTIONFinance Status Notifier Application
OPEN COLLECTIONHotel Operations ARA - Preview Submit API
OPEN COLLECTIONMerge/Transfer Request API - new TIP MMF Spec for sending Account Merge request to SF CLM
OPEN COLLECTIONTIP Internet Portal
OPEN COLLECTIONSecurity Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Scopes 1
OAuth scopes governing access to this provider's APIs.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 4
Portal, sign-up, and the first successful call
Agent Surfaces 5
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 5
Pagination, idempotency, versioning, errors, and events
Build 2
SDKs, sample code, and the tooling you integrate with
Access & Security 8
Authentication, authorization, and security posture
Scroll for all 8
Operate 1
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 4
The organization behind the API
Other 8
Properties that don't map to a standard resource type
Scroll for all 8
Source (apis.yml)
Work with this as data
Every provider here is available over the APIs.io API and to AI agents over MCP.