# American Express Global Business Travel **Canonical:** https://apis.io/providers/amex-gbt/ **Website:** https://www.amexglobalbusinesstravel.com/ **APIs profiled:** 17 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. ## Kin Score — 48.8 / 100 (developing) Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 48.8). | Facet | Score | |---|---| | Discoverability | 92.6 | | Contract Quality | 64.1 | | Governance | 16.7 | | Contract Governance | 16.7 | | Operational Transparency | 42.1 | | Developer Ergonomics | 58.9 | | Commercial Clarity | 21.1 | | Access Clarity | 21.1 | ## Agent readiness — 42.1 (agent-ready) | Dimension | Value | |---|---| | Spec Presence | yes | | Agentic Access | derived | | Reversibility Documented | no | | MCP Server | no | | Auth Clarity | yes | | Idempotency | no | | Error Semantics | verified | | OpenAPI Examples | partial | | Rate Limit Signal | no | | Event Surface Described | yes | | Agent Skills | derived | | Well Known Catalog | no | | Consent Identity | no | | Agent Card | no | | Dry Run Mode | no | ## Access Public OpenAPI contracts - client credentials issued only after onboarding — onboarding: unknown, pricing: unknown, trial: no (confidence: high). ## APIs (17) - **Egencia User Sync API** — SCIM-based user provisioning for an Egencia corporate travel programme. Egencia's own overview states the API "supports SCIM, or System for Cross-domain Identity Management, an ... - **Egencia Context SSO API** — Single sign-on entry point that carries contextual data into the Egencia booking flow at authentication time. Documented endpoints are GET /v1/newTrip and GET /v2/startTrip, whi... - **Egencia Company Details API** — Retrieves company information for an Egencia corporate account - name, display name and related detail - plus e-commerce settings and an audit view of those settings. Documented... - **Egencia Company CDF API** — Manages custom data fields - the client-defined fields Egencia describes as capturing "invoicing, reporting, approval, billing" detail, commonly department, billing unit, reason... - **Egencia Validation SPI** — A service provider interface, not a consumable API - Egencia calls the customer. At checkout, when a traveller presses book, Egencia posts the booking payload to a web service t... - **Egencia Expense SPI** — Near real-time push of booking and expense data out of Egencia into a customer's expense or ERP system. Egencia describes it as an "Expense capability" that pushes a message to ... - **Egencia Get Booking API** — Retrieval of a booking and its individual trip items, plus the receipts attached to an item. Documented operations are GET /v1/bookings/{bookingId}, GET /v1/bookings/{bookingId}... - **Egencia Expense Cancellation and Deletion API** — Trip-level cancellation and deletion of bookings. Documented operations are POST /v1/bookings/{bookingId}/cancel and POST /v1/bookings/{bookingId}/delete, which act on every tri... - **Egencia Approval Workflow API** — Programmatic approval or denial of booking requests, at trip level and at trip-item level. Documented operations are POST /v1/bookings/{bookingId}/approve, /deny and the matchin... - **Egencia Approval Customisation SPI** — An outbound service provider interface that lets a customer decide, at checkout time, whether level one and level two approval are required for a booking and who the approvers a... - **Egencia Receipt API** — Retrieval of the receipt for a booked trip item, via GET /v1/receipts/{itemId}, paired with a Receipt SPI that pushes a notification to a customer-built web service whenever a r... - **Egencia Duty of Care API** — Traveller-tracking data for risk and duty-of-care programmes. Egencia documents POST https://apis.egencia.com/dutyofcare/api/v1/bookings to create a paginated query of booking d... - **Egencia Reporting API (BI Transactions)** — Consolidated booking transaction data out of Egencia, and the closest thing in the estate to a documented exit path. POST /v1/transactions creates a filtered report over a date ... - **American Express Global Business Travel BI API** — American Express Global Business Travel BI API from American Express Global Business Travel — 14 path(s) described in OpenAPI. - **American Express Global Business Travel OpenAPI definition (Amex Gbt Service Company)** — American Express Global Business Travel OpenAPI definition from American Express Global Business Travel — 10 path(s) described in OpenAPI. - **American Express Global Business Travel Duty Of Care API** — American Express Global Business Travel Duty Of Care API from American Express Global Business Travel — 7 path(s) described in OpenAPI. - **American Express Global Business Travel OpenAPI definition (Amex Gbt Service Openconnect)** — American Express Global Business Travel OpenAPI definition from American Express Global Business Travel — 36 path(s) described in OpenAPI. ## MCP servers (1) - **American Express Global Business Travel MCP Server** ## Agentic access (1) - **Amex Gbt Agentic Access** — 171 operations · 97 acting · 36 human-in-the-loop ## Security (3) - **Amex Gbt Authentication** — oauth2 · 1 scheme - **Amex Gbt Domain Security** — TLSv1.3 · DMARC - **Amex Gbt Vulnerability Disclosure** — Hackerone · contact published ## Tags Travel, United States, Corporate Travel, Travel Management, Business Travel, Distribution, Booking, Aviation, Hotels, Rail, Car Rental, Expense, Duty of Care, Reporting --- Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/amex-gbt/). Scores are computed from the provider's own public artifacts under a published rubric.