Travel · industry standard

OpenTravel Specification (OTA Message Suite and OTM)

The OpenTravel Specification is the royalty-free message vocabulary the travel industry uses between suppliers, GDSs, channel managers and OTAs. It ships in two forms — the OTA 1.0 XML message suite, released twice yearly since 2001, and the model-driven OpenTravel 2.0 Object Model (OTM), which generates XML Schema, JSON Schema and Swagger 2.0 contracts from one model — plus the OpenTravel Code Lists used across air, hospitality, car rental, cruise, rail and GDS systems.

opentravel.org/The standard

1999First published

Yes — XML Schema (XSD), members onlyMachine-readable schema · gated

1providers in the catalog

Also known as OpenTravel, OTA, OpenTravel Alliance, OTM, OpenTravel Object Model.

Providers that carry OpenTravel Specification 1

These providers' own APIs.json profiles carry OpenTravel Specification as a tag — the provider's statement that the standard is part of what it does. APIs.io has not verified the implementation on this page; the de facto profiles on this site are where that measurement exists. Ordered by Kin Score.

Travelokadeveloping · 49.3

Read from the API Evangelist standards directory, facts verified 2026-08-17. Provider links come from the catalog's own identity tags and are rebuilt nightly. If this page is wrong about a standard or a provider, say so.