# OpenTravel Alliance

**Canonical:** https://apis.io/providers/opentravel-alliance/  
**Website:** https://opentravel.org/  
**APIs profiled:** 4

The OpenTravel Alliance is a volunteer, non-profit travel technology standards body headquartered in Melbourne, Florida, United States. Since 1999 it has published 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 generates 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. OpenTravel does not operate a booking service or sit in the distribution chain itself; it supplies the message vocabulary that suppliers, GDSs, channel managers and OTAs implement between each other, which makes it a switching-cost reducer rather than a switching-cost holder. Its API posture is honest but thin: there is no OpenTravel-operated runtime API and no public certification registry, though it does run a free self-serve developer portal — the OpenTravel Developers Network at opentraveldevelopersnetwork.com — and, as of 2026, an OAuth 2.1 protected Model Context Protocol server on opentravel.org. Specifications are royalty-free and free of charge, but the canonical download is behind a name/company/email lead-capture form with terms acceptance, and the OTM repository and member review periods are membership-gated ($950–$11,250/yr by revenue band). A public, unlicensed GitHub mirror at github.com/OpenTravel/OpenTravel-Specifications carries the bulk of the corpus — including eight Swagger 2.0 resource contracts — and is the only ungated route to machine-readable artifacts. The organization has announced work with the Linux Foundation to form an Open Travel Foundation.

## Kin Score — 52.1 / 100 (developing)

Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+0.0 from 52.1).

| Facet | Score |
|---|---|
| Discoverability | 83.3 |
| Contract Quality | 56.0 |
| Governance | 21.9 |
| Operational Transparency | 34.2 |
| Developer Ergonomics | 69.0 |
| Commercial Clarity | 44.7 |

## Agent readiness — 45.9 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| MCP Server | yes |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | documented |
| Rate Limit Signal | no |
| Event Surface Described | derived |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## APIs (4)

- **OpenTravel 2020A Hotel Descriptive Content Resource** — Swagger 2.0 resource contract generated from the OpenTravel 2.0 Object Model, 2020A Object Suite. Defines three operations for hotel descriptive content — GET /HotelDescriptiveC...
- **OpenTravel 2020A Facility Resource** — Swagger 2.0 resource contract generated from the OpenTravel 2.0 Object Model, 2020A Object Suite. Defines POST /Facilities and GET /Facilities/{Identifier} with 232 model defini...
- **OpenTravel 2018A Hospitality Offers Resource** — Swagger 2.0 resource contract generated from the OpenTravel 2.0 Object Model, 2018A Object Suite. Defines POST /HospitalityOffers and POST /HospitalityPropertyOffers with 372 mo...
- **OpenTravel 2018A Facility Resource** — Swagger 2.0 resource contract generated from the OpenTravel 2.0 Object Model, 2018A Object Suite. Defines POST /Facilities, POST /HospitalityFindHospitalityAvailability and POST...

## MCP servers (1)

- **OAuth 2.1 protected MCP server at https://opentravel.org/wp-json/mcp/mcp-oauth-server**

## Agentic access (1)

- **Opentravel Alliance Agentic Access** — 15 operations · 11 acting

## Security (2)

- **Opentravel Alliance Authentication** — oauth2 · 1 scheme
- **Opentravel Alliance Domain Security** — TLSv1.3 · HSTS

## Tags

Travel, United States, Standards, Aviation, Hospitality, Hotels, Car Rental, Rail, Cruise, Distribution, GDS, Booking, Channel, XML, JSON Schema

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/opentravel-alliance/). Scores are computed from the provider's own public artifacts under a published rubric.