openapi: 3.1.0
info:
  title: VesselFinder AIS Containers Master Data API
  description: 'REST API providing real-time and on-demand AIS vessel positions, voyage information,

    and vessel master data from the VesselFinder global AIS network (terrestrial and satellite).

    Authentication is performed via the `userkey` query parameter. Responses default to JSON

    and may be requested as XML by setting `format=xml`. Most pay-per-use methods deduct credits

    from the account''s balance; subscription methods (VesselsList, LiveData) are billed by fleet

    or area size and dataset selection.

    '
  version: '1.0'
  contact:
    name: VesselFinder API Support
    url: https://api.vesselfinder.com/docs/
  license:
    name: Commercial — VesselFinder Terms of Use
    url: https://www.vesselfinder.com/terms
servers:
- url: https://api.vesselfinder.com
  description: VesselFinder AIS API
security:
- UserKey: []
tags:
- name: Master Data
  description: Static vessel particulars by IMO.
paths:
  /masterdata:
    get:
      tags:
      - Master Data
      summary: Get Master Data
      description: Return static vessel particulars (Master dataset) by IMO.
      operationId: getMasterData
      parameters:
      - $ref: '#/components/parameters/userkey'
      - name: imo
        in: query
        required: true
        description: Comma-separated list of IMO numbers.
        schema:
          type: string
          example: '9175717'
      - $ref: '#/components/parameters/format'
      responses:
        '200':
          description: Array of master-data records.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/MasterData'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '402':
          $ref: '#/components/responses/PaymentRequired'
components:
  responses:
    PaymentRequired:
      description: Insufficient credits or expired access.
    Unauthorized:
      description: Invalid or missing userkey.
  schemas:
    MasterData:
      type: object
      description: Static vessel particulars.
      properties:
        IMO:
          type: integer
        NAME:
          type: string
        FLAG:
          type: string
        TYPE:
          type: string
        BUILT:
          type: integer
        BUILDER:
          type: string
        OWNER:
          type: string
        MANAGER:
          type: string
        LENGTH:
          type: number
          format: float
        BEAM:
          type: number
          format: float
        MAXDRAUGHT:
          type: number
          format: float
        GT:
          type: integer
          description: Gross tonnage.
        NT:
          type: integer
          description: Net tonnage.
        DWT:
          type: integer
          description: Deadweight tonnage.
        TEU:
          type: integer
        CRUDE:
          type: integer
  parameters:
    format:
      name: format
      in: query
      description: Response format. Defaults to JSON.
      schema:
        type: string
        enum:
        - json
        - xml
        default: json
    userkey:
      name: userkey
      in: query
      required: true
      description: Personal API key issued by VesselFinder.
      schema:
        type: string
  securitySchemes:
    UserKey:
      type: apiKey
      in: query
      name: userkey