# OpenTravel Alliance

> Volunteer, non-profit travel technology standards body (Melbourne, Florida, founded 1999).
> Publishes the OpenTravel Specification — the OTA 1.0 XML message suite (releases 2001A
> through 2024A) and the model-driven OpenTravel 2.0 Object Model (OTM), which compiles to
> XML Schema, JSON Schema and Swagger 2.0 resource contracts — plus the OpenTravel Code Lists
> used across air, hospitality, car rental, cruise, rail, GDS, channel and technology-provider
> systems. Specifications are royalty-free and free of charge.

Generated by API Evangelist on 2026-07-28 because opentravel.org publishes no /llms.txt
(HTTP 404). Facts below are drawn from apis.yml and the artifacts in this repository.

## What OpenTravel is not

- It operates **no runtime API**. Every Swagger 2.0 document it publishes declares a
  placeholder host (`127.0.0.1` or `example.com`) and is a contract for an implementer to
  host, not an endpoint OpenTravel serves.
- There is **no certification programme**, no conformance test suite and no certified
  implementer registry. The adopter list is self-nominated.
- There is **no status page**, no SLA, no deprecation policy and no dated changelog.

## Specifications

- [OpenTravel Specifications](https://opentravel.org/specifications/): index of what the
  organization publishes.
- [About the OpenTravel 2.0 Object Model](https://opentravel.org/about-2-0-object-model/):
  the object/library/repository model behind OTM.
- [Download the OpenTravel Specification](https://opentravel.org/download-the-opentravel-specification/):
  canonical download, behind a name/company/email lead-capture form with terms acceptance.
- [Download the OpenTravel Code List](https://opentravel.org/download-code-list/): the
  enumerations (AccommodationClass, BedType, BookingChannel, DistributionType and hundreds more).
- [OpenTravel-Specifications GitHub mirror](https://github.com/OpenTravel/OpenTravel-Specifications):
  the only ungated route — 19,066 files, single commit 2024-11-26, no LICENSE.

## Machine-readable contracts in this repository

- `openapi/opentravel-2020a-hotel-descriptive-content-resource-openapi.json` — Swagger 2.0,
  operations `Get`, `Query`, `Notification`.
- `openapi/opentravel-2020a-facility-resource-openapi.json` — Swagger 2.0, operations `Post`, `Get`.
- `openapi/opentravel-2018a-hospitality-offers-resource-openapi.json` — Swagger 2.0, operations
  `FindSinglePropertyOffers`, `FindMultiPropertyOffers`.
- `openapi/opentravel-2018a-facility-resource-openapi.json` — Swagger 2.0, operations
  `FindHospitalityAvailability`, `RetrieveHospitalityAvailability`, `HospitalityFacilitySearch`.
- Each has a `-defs-` sibling carrying the inlined model definitions (337, 232, 372 and 187
  definitions respectively).
- `json-schema/` — the seven OTM `_Trim` JSON Schema draft-04 modules those contracts `$ref`
  (163 definitions): Common 5.0.0, Organization 4.1.0, OrganizationHospitality 4.0.0,
  FacilityResource 1.0.0, HospitalityContent 1.0.0, HospitalityFacility 1.0.0,
  HospitalityOffers 1.0.0 — plus the three `CodeList` libraries (4.0.0 and 4.1.0 from 2020A,
  3.0.0 from 2018A).
- `vocabulary/opentravel-alliance-vocabulary.yml` — the OpenTravel Code Lists read out of those
  CodeList modules: 193 code lists, 4,052 enumerated terms (bed types, booking channels,
  distribution types, meeting-room formats, cuisine types…). The canonical download at
  opentravel.org is an Excel workbook behind a lead-capture form; the JSON Schema form in the
  public mirror is the only ungated machine-readable copy.
- `examples/` — OpenTravel's own compiler-generated JSON example payloads for the 2018A
  hospitality resources, each bound 1:1 to a real `operationId` request or 201 response. No
  example payloads are published for the 2020A suite.
- `cli/opentravel-alliance-cli.yml` — `ota2compile`, the OTA2 Type Library Compiler CLI that
  produces every artifact above from an OTM library (`-S` Swagger, `-J` JSON Schema, `-E`
  examples, `-H` HTML docs, `-O` OpenAPI 3.x — the last never used for a published suite).

## Developer surfaces

- [OpenTravel Developers Network (ODN)](https://www.opentraveldevelopersnetwork.com/): the
  free developer portal — publications, publication artifacts, comment submission, learning
  and support resources, calendars.
- [ODN Schema Products](https://www.opentraveldevelopersnetwork.com/schema-products-page)
- [ODN Implementer Support](https://www.opentraveldevelopersnetwork.com/schema-support)
- [ODN Current Work](https://www.opentraveldevelopersnetwork.com/all-active-work-public)
- [Specification Assistance form](https://opentravel.org/spec-assistance/)
- [Help with common technical issues](https://opentravel.org/help-with-common-technical-issues/)
- [OTM Library Repository console](https://opentravelmodel.net/) — login required, no documented API.
- [Download the OTM Development Environment (DEx)](https://opentravel.org/download-otm-tool/)

## Agent surfaces

- MCP server: `https://opentravel.org/wp-json/mcp/mcp-oauth-server` (OAuth 2.1 + PKCE, scope
  `mcp`). Auth-gated: an anonymous `tools/list` returns 401, so the tool set is not public.
  See `mcp/opentravel-alliance-mcp.yml`.
- OAuth metadata: `/.well-known/oauth-authorization-server` (RFC 8414) and
  `/.well-known/oauth-protected-resource` (RFC 9728). Both 200.
- This MCP surface belongs to the opentravel.org WordPress site. There is no evidence it
  exposes the specification corpus.

## Terms and access

- [Intellectual Property Policy](https://opentravel.org/intellectual-property/): non-exclusive,
  royalty-free, sublicensable licence.
- [Terms and Conditions](https://opentravel.org/terms-and-conditions/): copy, modify, bundle,
  distribute and sublicense permitted; attribution required; immediate termination on breach.
- [Privacy Policy](https://opentravel.org/privacy-policy/)
- [Membership](https://opentravel.org/membership/): $950–$11,250/yr by revenue band. Membership
  buys OTM repository add/reuse/extend rights, workgroup participation and early review access
  — it does not buy the specification, which is free either way.
- [Join OpenTravel](https://opentravel.org/join-opentravel/)

## Organization

- [About](https://opentravel.org/about-us/) · [Governance](https://opentravel.org/governance/)
  · [Partners](https://opentravel.org/partners/) · [Contact](https://opentravel.org/contact-us/)
- [Announcements](https://opentravel.org/announcements/)
- [FAQ](https://opentravel.org/frequently-asked-questions/)
- [Message adopters and integrators](https://opentravel.org/opentravel-message-adopters-integrators/)
- [Open Travel Foundation preview](https://opentravel.org/open-travel-foundation-preview/):
  announced work with the Linux Foundation to form an open-source travel-retail foundation.
- [Offer–Order workgroup](https://opentravel.org/offer-order/): cross-sector offer/order
  standard work, the open alternative to IATA NDC.
- [OpenAPI Initiative cooperation](https://opentravel.org/openapi-initiative-cooperation/) and
  [Arazzo Specification advocacy](https://opentravel.org/openapi-arazzo-specification/).
- [GitHub organization](https://github.com/OpenTravel): 12 public repositories — OTM-DE-Compiler,
  OTM-DE-Utilities (DEx), ota2-exporter-utility, ota2-repository-playbooks, OTA-Publication-Site.