Viator
Viator is a Tripadvisor company and the largest online marketplace for tours, activities and travel experiences, headquartered in the United States and listing more than 300,000 bookable products across roughly 2,500 destinations. It sits on the demand side of the travel distribution chain as an aggregator and reseller of third-party operator inventory, and on the supply side as the channel counterparty that tour operators' reservation systems connect into. Its API posture is unusually open for travel: the full Viator Partner API v2 OpenAPI, the legacy v1 affiliate and merchant specifications, the Viator Reservation System (supplier) API and four Postman collections are all published without a login at docs.viator.com, and Basic Access affiliate keys are issued self-serve at no cost on account creation. Everything beyond that is gated - Full Access, Full Access plus Booking, Merchant and supplier connectivity all require qualification by Viator and, for transactional integrations, passing a two-part front-end and back-end certification. No open travel standard is referenced anywhere in the specifications: the contract is entirely Viator-proprietary, product identifiers are Viator-internal, and partners are contractually required to prevent search engines indexing Viator reviews and unique content.
Viator publishes 17 APIs on the APIs.io network, including Attraction services API, Attractions API, Auxiliary API, and 14 more. Tagged areas include Travel, United States, Tours and Activities, Experience, and OTA.
The Viator catalog on APIs.io includes 1 event-driven AsyncAPI specification.
Viator’s developer surface includes authentication, documentation, developer portal, support, engineering blog, API reference, getting-started guide, and 36 more developer resources.
Kin Score
APIs 17
Individual APIs this provider publishes, each with its own machine-readable definition.
Viator Attraction services API
Attraction services
Viator Attractions API
The Attractions API from Viator — 2 operation(s) for attractions.
Viator Auxiliary API
The Auxiliary API from Viator — 6 operation(s) for auxiliary.
Viator Availability API
The Availability API from Viator — 4 operation(s) for availability.
Viator Booking services API
Booking services
Viator Bookings API
The Bookings API from Viator — 13 operation(s) for bookings.
Viator Deprecated API
This section lists endpoints that are no longer recommended for new or updated integrations. These endpoints remain available for existing connections only, will stop receiving ...
Viator Deprecated services API
Deprecated services
Viator General services API
General services
Viator Payments API
The Payments API from Viator — 1 operation(s) for payments.
Viator Product services API
Product services
Viator Products API
The Products API from Viator — 7 operation(s) for products.
Viator Reservation system APIs API
This section describes all the possible services, some of which are mandatory, that reservation systems can develop to integrate with Viator. All API requests made by Viator to ...
Viator Support services API
Support services
Viator Taxonomy services API
Taxonomy services
Viator Utility services API
Utility services
Viator Viator APIs API
This section describes the Viator built API(s) available for reservation system consumption. **Note**: For these APIs, the request is sent **to** Viator and the response is rece...
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Open Collections 4
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Viator API Documentation & Specification – Merchant Partners
OPEN COLLECTIONViator Partner API
OPEN COLLECTIONViator Reservation System API
OPEN COLLECTIONRate Limits 1
Documented rate limits and quota policies.
Viator Rate Limits
RATE LIMITSEvent Specifications 1
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Viator Events
ASYNCAPISecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 6
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 4
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 8
Pagination, idempotency, versioning, errors, and events
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Build 6
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 4
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
Other 5
Properties that don't map to a standard resource type
Source (apis.yml)
Work with this as data
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