openapi: 3.0.1
info:
  title: Duffel Ancillaries Order Changes API
  description: The Duffel API is a REST API to sell travel - flights, accommodation (Stays), and ancillaries. It covers offer requests and offers, orders, payments, seat maps, ancillary services, accommodation search and booking, and webhooks. Requests are authenticated with a Bearer access token and must include a Duffel-Version header identifying the API version.
  termsOfService: https://duffel.com/legal/terms-of-use
  contact:
    name: Duffel Support
    url: https://help.duffel.com
  version: v2
servers:
- url: https://api.duffel.com
security:
- bearerAuth: []
tags:
- name: Order Changes
  description: Modify an existing order.
paths:
  /air/order_change_requests:
    post:
      operationId: createOrderChangeRequest
      tags:
      - Order Changes
      summary: Create an order change request
      description: Searches for the available change options for an existing order.
      parameters:
      - $ref: '#/components/parameters/DuffelVersion'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '201':
          description: The order change request with available offers.
  /air/order_change_requests/{id}:
    get:
      operationId: getOrderChangeRequest
      tags:
      - Order Changes
      summary: Get a single order change request
      parameters:
      - $ref: '#/components/parameters/DuffelVersion'
      - $ref: '#/components/parameters/PathId'
      responses:
        '200':
          description: The order change request.
  /air/order_changes:
    post:
      operationId: createOrderChange
      tags:
      - Order Changes
      summary: Create a pending order change
      parameters:
      - $ref: '#/components/parameters/DuffelVersion'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '201':
          description: The pending order change was created.
  /air/order_changes/{id}:
    get:
      operationId: getOrderChange
      tags:
      - Order Changes
      summary: Get a single order change
      parameters:
      - $ref: '#/components/parameters/DuffelVersion'
      - $ref: '#/components/parameters/PathId'
      responses:
        '200':
          description: The order change.
  /air/order_changes/{id}/actions/confirm:
    post:
      operationId: confirmOrderChange
      tags:
      - Order Changes
      summary: Confirm an order change
      description: Confirms a pending order change, applying the new flights and pricing.
      parameters:
      - $ref: '#/components/parameters/DuffelVersion'
      - $ref: '#/components/parameters/PathId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '200':
          description: The confirmed order change.
components:
  parameters:
    PathId:
      name: id
      in: path
      required: true
      schema:
        type: string
    DuffelVersion:
      name: Duffel-Version
      in: header
      required: true
      description: The version of the Duffel API to use for this request.
      schema:
        type: string
        default: v2
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'Authenticate with your Duffel access token as a Bearer token in the Authorization header (Authorization: Bearer YOUR_ACCESS_TOKEN).'