generated: '2026-07-28'
method: searched
source: >-
  https://docs.viator.com/partner-api/technical/#section/Updates - the dated Updates table embedded
  in the Viator Partner API v2 specification's info.description - and
  https://docs.viator.com/supplier-api/technical/ (What's new section of the Viator Reservation
  System API)
notes: >-
  Viator publishes no standalone changelog page, RSS feed or release-notes site. The change record
  lives inside the OpenAPI documents themselves: a dated "Updates / Latest updates" table in the
  Partner API v2 description and a narrative "What's new" section in the Reservation System API.
  There is no separate probe-able changelog URL, so no docs-URL ChangeLog link accompanies this
  artifact. This is a recent window, not full history; the specification also keeps a longer
  "Update history" appendix.
scheme: dated-entries-in-spec
current_version: '2.0'
feeds: []
apis:
- api: Viator Partner API v2
  spec: openapi/viator-partner-api-v2-openapi.json
  url: https://docs.viator.com/partner-api/technical/#section/Updates
  entries:
  - date: '2026-05-05'
    breaking: false
    type: addition
    highlight: >-
      Added support for product-option-level logistics resolution via a new optional logistics
      object.
  - date: '2025-11-11'
    breaking: false
    type: change
    highlight: >-
      Updated the bookingsModifiedSince response with new eventTypes and opened the endpoint to all
      partner types.
    note: Published in the table as "11 Sep 2025".
  - date: '2025-07-01'
    breaking: false
    type: addition
    operations: [amendmentCheck, amendmentQuote, amendmentAmend]
    highlight: Added the booking amendment endpoints to the Bookings section.
  - date: '2025-03-27'
    breaking: false
    type: change
    operations: [searchFreeText]
    highlight: Added tag filtering for "searchType":"PRODUCTS".
  - date: '2025-03-20'
    breaking: false
    type: addition
    operations: [productsRecommendations]
    highlight: Added product-to-product recommendations.
  - date: '2025-03-19'
    breaking: false
    type: change
    operations: [availabilitySchedules, availabilitySchedulesBulk, availabilitySchedulesModifiedSince,
      availabilityCheck, searchFreeText, productsSearch, bookingsCartHold, bookingsHold]
    highlight: Added Extra Charges information across the availability, search and hold endpoints.
  - date: '2025-02-13'
    breaking: false
    type: addition
    operations: [products, productsModifiedSince, productsBulk, productsSearch, searchFreeText]
    highlight: Added a videos object to the product content responses.
  - date: '2025-02-11'
    breaking: false
    type: removal
    operations: [bookingsCartBook]
    highlight: >-
      Removed the TRANSACTION_NOT_ALLOWED, CARD_INACTIVE and CARD_RESTRICTED rejection reasons.
  - date: '2025-02-04'
    breaking: false
    type: addition
    operations: [productsSearch, searchFreeText]
    highlight: >-
      Added AED, ARS, CLP, CNY, COP, FJD, IDR, ILS, ISK, KRW, MXN, MYR, PEN, PHP, PLN, RUB, THB, TRY
      and VND as currency options.
  - date: '2024-12-04'
    breaking: false
    type: addition
    operations: [bookingsCartBook]
    highlight: Added the PROCESSOR_ISSUE_WITH_PAYMENT rejection reason.
  - date: '2024-11-19'
    breaking: false
    type: addition
    operations: [bookingsCartBook]
    highlight: >-
      Added the SUSPECTED_FRAUD, SOFT_DECLINE, HARD_DECLINE, THREE_D_SECURE_REQUIRED, INTERNAL_ERROR
      and PROCESSOR_UNAVAILABLE rejection reasons.
  - date: '2024-10-24'
    breaking: false
    type: deprecation
    highlight: Deprecated the /v1/product/photos endpoint.
  - date: '2024-10-23'
    breaking: false
    type: addition
    operations: [attractionsSearch, attractions, destinations]
    highlight: >-
      Added the Attractions section and the /destinations endpoint, and refreshed the endpoint
      access matrix.
  - date: '2024-10-21'
    breaking: false
    type: removal
    highlight: Removed the VIATOR_EXCLUSIVE flag from the product search endpoints.
  - date: '2024-10-01'
    breaking: false
    type: removal
    highlight: Removed the COVID-19 safety attributes from the AdditionalInfo schema.
  - date: '2024-08-06'
    breaking: false
    type: change
    highlight: >-
      Changed DEFAULT tour-grade behaviour on the product, availability, hold and confirm endpoints
      (explicitly backward compatible).
  - date: '2024-07-29'
    breaking: false
    type: addition
    operations: [bookingsModifiedSince]
    highlight: Added the CUSTOMER_CANCELLATION eventType for customer-initiated cancellations.
  - date: '2024-03-14'
    breaking: false
    type: addition
    operations: [bookingsCartBook, bookingsStatus]
    highlight: >-
      Added INSUFFICIENT_FUNDS, INVALID_PAYMENT_DETAILS, TRANSACTION_NOT_ALLOWED, CARD_INACTIVE and
      CARD_RESTRICTED rejection reasons; added the ON_HOLD booking status.
  - date: '2024-02-13'
    breaking: false
    type: addition
    operations: [suppliersSearchProductCodes]
    highlight: >-
      Added supplierAgreedToLegalCompliance, registrationCountry, tradeRegisterName and
      registeredBusinessNumber, plus countryCode on ContactDetails.
  - date: '2023-09-11'
    breaking: false
    type: addition
    highlight: Added PDF voucher support; made bookerInfo.firstName required to match the definition.
  - date: '2023-07-05'
    breaking: false
    type: addition
    operations: [bookingsCartHold, bookingsCartBook, paymentsCreateToken]
    highlight: Added the cart booking flow and the checkout-session payment accounts endpoint.
- api: Viator Reservation System API
  spec: openapi/viator-reservation-system-api-openapi.json
  url: https://docs.viator.com/supplier-api/technical/
  entries:
  - version: '2.0'
    breaking: true
    type: major-release
    highlight: >-
      Introduced endpoint versioning (legacy endpoints are v1.0, new endpoints start at v2.0), moved
      the API key onto HTTP headers, made JSON the only supported format, added the productOptionId
      single product-variant identifier, added full pricing capabilities (per-person, tiered
      per-person and unit pricing), added Viator-hosted notification webhooks for salability,
      capacity, pricing and special offers, added the Reserve endpoint that holds inventory and
      price before booking, and shipped a self-service contract-testing tool.
    deprecations:
    - Real-time Availability API (availability) superseded by availabilityCheck and reserve
    - Batch Availability API (batchAvailability) superseded by calendar
    - Batch Pricing API (batchPricing) superseded by calendar
    - Availability Notifications (2) API (availabilityNotification2) superseded by eventNotification
    - XML (application/xml) request and response bodies
    - the legacy SOAP WSDL/XSD interface