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OpenAPI Specification

openapi: 3.2.0
info:
  title: Extralingo Public Trips API
  version: 1.0.0
  summary: Search language schools, configure trips, and submit unpaid bookings.
  description: 'Version **1.0.0** of the Extralingo agent REST API. All paths below are relative to **`https://www.extralingo.com/api/v1`** (the documented base). The same routes also work under unversioned `/api/*` and remain fully supported. Breaking changes ship under `/api/v2` with at least 6 months'' notice; deprecated endpoints will eventually send `Deprecation` and `Sunset` headers before removal. **Read** endpoints need no authentication. **Write** endpoints require OAuth 2.1 (authorization code + PKCE S256; scopes `trips`, `requests`, `bookings`; discover the resource at /.well-known/oauth-protected-resource; see /auth.md). Create endpoints accept optional **`Idempotency-Key`** (IETF draft): same key + same authenticated user + same JSON body within 24 hours returns the original response; same key + different body returns **422**. When OAuth is enabled, `POST /trips` is gated like MCP `save_trip`. Finder prices are indicative; call `POST /trips/{trip_id}/price` for a live quote. create_booking is unpaid: the school still confirms, Extralingo emails the student, and payment is only via Extralingo after confirmation. Prefer POST /mcp (MCP) if you can use tools. Keep request volumes reasonable; usage may be rate-limited. Developer overview: /en/developers. Site index: /llms.txt.'
  contact:
    name: Extralingo
    url: https://www.extralingo.com/en/contact
servers:
- url: https://www.extralingo.com/api/v1
  description: Agent REST API v1 (production)
tags:
- name: trips
  description: Saved trip configurations (not bookings)
paths:
  /trips:
    post:
      tags:
      - trips
      operationId: saveTrip
      summary: Create or update a trip draft
      description: Returns trip_id, url (legacy), trip_url, and continue_url (/s/{id}) so the student can continue on Extralingo.com with selections restored. Not a booking. No OTP.
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                school_id:
                  type: integer
                trip_id:
                  type: string
                configuration:
                  type: object
                locale:
                  type: string
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TripSavedResponse'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Email verification required
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '404':
          description: Not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '422':
          description: Validation failed or idempotency key reused with a different payload
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '429':
          description: Rate limited
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
  /trips/{tripId}:
    get:
      tags:
      - trips
      operationId: getTrip
      summary: Load a saved trip
      description: Returns continue_url for website handoff with the configuration restored.
      parameters:
      - name: tripId
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TripSavedResponse'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Email verification required
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '404':
          description: Not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '422':
          description: Validation failed or idempotency key reused with a different payload
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '429':
          description: Rate limited
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
  /trips/{tripId}/email:
    post:
      tags:
      - trips
      operationId: emailTrip
      summary: Email continue_url to the verified account
      security:
      - agentToken: []
      description: Requires auth_token. Sends only to the verified account email. A different email is rejected. Without auth, use continue_url from save_trip.
      parameters:
      - name: tripId
        in: path
        required: true
        schema:
          type: string
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                email:
                  type: string
                  description: Optional. Must match the verified account email if sent.
                firstName:
                  type: string
                lastName:
                  type: string
                locale:
                  type: string
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TripEmailedResponse'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Email verification required
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '404':
          description: Not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '422':
          description: Validation failed or idempotency key reused with a different payload
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '429':
          description: Rate limited
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
  /trips/{tripId}/price:
    post:
      tags:
      - trips
      operationId: calculateTripPrice
      summary: Live checkout quote (not a booking)
      parameters:
      - name: tripId
        in: path
        required: true
        schema:
          type: string
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                school_id:
                  type: integer
                configuration:
                  type: object
                currency:
                  type: string
                  default: EUR
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                type: object
                additionalProperties: true
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Email verification required
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '404':
          description: Not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '422':
          description: Validation failed or idempotency key reused with a different payload
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '429':
          description: Rate limited
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
components:
  schemas:
    TripSavedResponse:
      type: object
      properties:
        success:
          type: boolean
        trip_id:
          type: string
        url:
          type: string
          description: Saved trip URL (/s/{trip_id}). Alias of continue_url; kept for backwards compatibility.
        trip_url:
          type: string
          description: 'Same as url: the /s/{trip_id} link for this saved trip draft.'
        continue_url:
          type: string
          description: URL for the student to continue this configured trip on Extralingo.com with their current school, dates, course, accommodation and other saved selections restored.
        school_url:
          type: string
          description: Locale-specific school page URL for browsing without the saved configuration.
        school_id:
          type: integer
        school_name:
          type: string
        configuration:
          type: object
          additionalProperties: true
        summary:
          type: string
        note:
          type: string
    Error:
      type: object
      properties:
        success:
          type: boolean
          examples:
          - false
        error:
          type: string
        code:
          type: string
        hint:
          type: string
        retryAfter:
          type: integer
          description: Seconds until the daily account-school limit resets (Europe/Amsterdam midnight).
    TripEmailedResponse:
      type: object
      properties:
        success:
          type: boolean
        trip_id:
          type: string
        url:
          type: string
          description: Saved trip URL (/s/{trip_id}). Alias of continue_url; kept for backwards compatibility.
        trip_url:
          type: string
          description: 'Same as url: the /s/{trip_id} link for this saved trip draft.'
        continue_url:
          type: string
          description: URL for the student to continue this configured trip on Extralingo.com with their current school, dates, course, accommodation and other saved selections restored.
        emailed_to:
          type: string
        message:
          type: string
  securitySchemes:
    agentToken:
      type: http
      scheme: bearer
      description: OAuth 2.1 access token from POST /oauth/token (authorization code + PKCE). See /auth.md.