API Evangelist enhancements for OpenAPI definition

overlay: 1.0.0
info:
  title: API Evangelist enhancements for OpenAPI definition
  version: 1.0.0
extends: openapi/amex-gbt-service-company-openapi.json
x-generated: '2026-07-28'
x-method: generated
x-source: >-
  Derived from openapi/amex-gbt-service-company-openapi.json (OpenAPI 3.1.0, 10 paths, 17 operations) plus the
  cross-cutting artifacts in this repo. The harvested specification itself is never mutated.
actions:
- target: $.info
  description: Provider, provenance and cross-cutting contract metadata.
  update:
    x-apievangelist-slug: "amex-gbt"
    x-apievangelist-provider: "American Express Global Business Travel"
    x-apievangelist-platform: "Egencia"
    x-apievangelist-harvested: "2026-07-28"
    x-apievangelist-spec-source: "anonymous HTTP 200 from apis.egencia.com"
    x-apievangelist-access-model: "public OpenAPI contracts; runtime gated on OAuth 2.0 client credentials issued only after commercial onboarding"
    x-apievangelist-conventions: "conventions/amex-gbt-conventions.yml"
    x-apievangelist-errors: "errors/amex-gbt-error-codes.yml"
    x-apievangelist-lifecycle: "lifecycle/amex-gbt-lifecycle.yml"
    x-apievangelist-changelog: "changelog/amex-gbt-changelog.yml"
    x-apievangelist-authentication: "authentication/amex-gbt-authentication.yml"
    x-apievangelist-data-model: "data-model/amex-gbt-data-model.yml"
    x-apievangelist-idempotency: "none - no Idempotency-Key or equivalent exists anywhere in this estate"
    x-apievangelist-rate-limits: "none published"
    x-apievangelist-note: "Service-level definition: the union of the product-level operations for this deployed service plus the infrastructure operations Egencia does not present as products - /gdpr erasure and validation, /base/liveness, /base/readiness, /base/version and /v1/sensitive/audit/clean. Several operations appear here and nowhere else."