American Express Global Business Travel
American Express Global Business Travel (Amex GBT, NYSE GBTG, headquartered in New York) is the largest business-to-business travel platform in the world, operating in more than 140 countries under the Amex GBT, Egencia and Ovation brands, with CWT acquired in September 2025. Its home market is the United States. In the travel distribution chain Amex GBT is an intermediary rather than a supplier - a travel management company that aggregates air, hotel, rail, car and ground content sourced through the GDS layer, through NDC and through direct supplier connections, then resells it to corporate travel programmes with policy, approval, duty-of-care and reporting wrapped around it. It holds no inventory of its own, but it does hold the booking record, and that is where the switching cost lives. Its API posture is genuinely open at the documentation layer and firmly closed at the runtime layer. The Egencia Developer Center publishes thirteen named APIs and SPIs, and every one of them serves a real, anonymously retrievable OpenAPI 3.1.0 document from apis.egencia.com - no login, no key, no click-through. The identity surface is standards-based (SCIM 2.0 user provisioning over OAuth 2.0 client credentials); the booking, approval, expense, receipt, duty-of-care and reporting surfaces are proprietary Egencia shapes with no OpenTravel, HTNG or IATA NDC schema anywhere in them. Runtime access is customer-account gated - Egencia's own documentation states that "the values for client id and client secret will be provided to the Client after on-boarding to Egencia API platform", and every production endpoint returns 401 to an anonymous caller. So - public contracts, gated runtime, a real documented bulk data export in the BI Transactions API, and API terms Egencia reserves the right to change in its sole discretion.
Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.
API Evangelist profiles American Express Global Business Travel the way a machine reads it — 50 machine-readable artifacts across 17 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — American Express Global Business Travel scores 46.6/100 (developing), with a separate agent-readiness read of 44/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
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How we profile American Express Global Business Travel
Each block below is one kind of artifact we hold for American Express Global Business Travel. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 26
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
American Express Global Business Travel Agent Assist Notes API
The Agent Assist Notes API from American Express Global Business Travel — 1 operation(s) for agent assist notes.
American Express Global Business Travel Approval API
Approval interface that will get approval custom detail from external client based on the booking data passed in request
American Express Global Business Travel Availability Probes Controller API
The availability-probes-controller API from American Express Global Business Travel — 2 operation(s) for availability-probes-controller.
American Express Global Business Travel bookings v1 API
The bookings v1 API from American Express Global Business Travel — 12 operation(s) for bookings v1.
American Express Global Business Travel bookings v2 API
The bookings v2 API from American Express Global Business Travel — 2 operation(s) for bookings v2.
American Express Global Business Travel Company Details API
The Company Details API from American Express Global Business Travel — 2 operation(s) for company details.
American Express Global Business Travel Custom Data Field Cleanup Controller API
The custom-data-field-cleanup-controller API from American Express Global Business Travel — 1 operation(s) for custom-data-field-cleanup-controller.
American Express Global Business Travel Custom Data Fields (CDF) API
CDF APIs to retrieve Definitions and Manage Values.
American Express Global Business Travel Doc Audit Clean Up Controller API
The doc-audit-clean-up-controller API from American Express Global Business Travel — 1 operation(s) for doc-audit-clean-up-controller.
American Express Global Business Travel DutyOfCare Data API
The DutyOfCare Data API from American Express Global Business Travel — 2 operation(s) for dutyofcare data.
American Express Global Business Travel Ecommerce Settings Controller API
The ecommerce-settings-controller API from American Express Global Business Travel — 2 operation(s) for ecommerce-settings-controller.
American Express Global Business Travel Expense SPI API
Push Expense and Subscription Operation. This is only an example. The path and the host are specific for each implementor. However, the model is fixed and versioned.
American Express Global Business Travel Gdpr Controller API
The gdpr-controller API from American Express Global Business Travel — 1 operation(s) for gdpr-controller.
American Express Global Business Travel Pos Iata Controller API
The pos-iata-controller API from American Express Global Business Travel — 1 operation(s) for pos-iata-controller.
American Express Global Business Travel Receipts API
The receipts API from American Express Global Business Travel — 1 operation(s) for receipts.
American Express Global Business Travel Redirection Controller API
The redirection-controller API from American Express Global Business Travel — 2 operation(s) for redirection-controller.
American Express Global Business Travel Resolve Controller API
The resolve-controller API from American Express Global Business Travel — 1 operation(s) for resolve-controller.
American Express Global Business Travel Schemas Controller API
The schemas-controller API from American Express Global Business Travel — 2 operation(s) for schemas-controller.
American Express Global Business Travel SCIM User Sync V1 API
SCIM 2.0 compliant user sync APIs
American Express Global Business Travel SCIM User Sync V2 API
SCIM 2.0 compliant user sync APIs version 2.
American Express Global Business Travel SCIM User Sync V3 API
SCIM 2.0 compliant user sync APIs version 3.
American Express Global Business Travel SCIM V1 Admin Users API
SCIM 2.0 compliant admin-users sync APIs
American Express Global Business Travel Third Party Acknowledgement API
The Third Party Acknowledgement API from American Express Global Business Travel — 1 operation(s) for third party acknowledgement.
American Express Global Business Travel Transaction Service Controller API
Transaction data operations
American Express Global Business Travel Validation API
Validation interface that will request authorization of booking based on the data provided at checkout time.This is only an example. The path and the host are specific for each ...
American Express Global Business Travel Version Controller API
The version-controller API from American Express Global Business Travel — 1 operation(s) for version-controller.
Scroll within the panel for all 26 ·
Open Collections 17
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Openconnect Approval Service
OPEN COLLECTIONEgencia Approval Workflow API
OPEN COLLECTIONEgencia Get Booking API
OPEN COLLECTIONEgencia Cancellation/Deletion API
OPEN COLLECTIONEgencia Company CDF API
OPEN COLLECTIONCompany Details API
OPEN COLLECTIONDuty Of Care API
OPEN COLLECTIONExpense SPI
OPEN COLLECTIONEgencia Receipt API
OPEN COLLECTIONBI API
OPEN COLLECTIONBI API
OPEN COLLECTIONOpenAPI definition
OPEN COLLECTIONDuty Of Care API
OPEN COLLECTIONOpenAPI definition
OPEN COLLECTIONSSO Context API
OPEN COLLECTIONEgencia User Sync API
OPEN COLLECTIONValidation SPI
OPEN COLLECTIONScroll within the panel for all 17 ·
MCP Servers 1
Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.
Model Context Protocol servers that expose these APIs to AI agents.
Event Specifications 1
Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Amex Gbt Webhooks
ASYNCAPISecurity Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Scopes 1
OAuth scopes are the vocabulary of least-privilege access. Profiling them shows exactly what an integration — or an agent acting on a user's behalf — is allowed to do.
OAuth scopes governing access to this provider's APIs.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for American Express Global Business Travel — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 3
Portal, sign-up, and the first successful call
Documentation 6
Reference material describing how the API behaves
Agent Surfaces 5
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 7
Pagination, idempotency, versioning, errors, and events
Scroll within the panel for all 7 ·
Build 2
SDKs, sample code, and the tooling you integrate with
Access & Security 6
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 4
The organization behind the API
Other 17
Properties that don't map to a standard resource type
Scroll within the panel for all 17 ·
← All providers · Data indexed from github.com/api-evangelist/amex-gbt · machine-readable index on apis.io
This is an independent, third-party profile of American Express Global Business Travel, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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