openapi: 3.1.0
info:
  title: VesselFinder AIS Containers Distance 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: Distance
  description: Sea-route distance and geometry between two points.
paths:
  /distance:
    get:
      tags:
      - Distance
      summary: Get Sea Distance
      description: Return the shortest sea route between two coordinates as a GeoJSON LineString together with distance in meters.
      operationId: getDistance
      parameters:
      - $ref: '#/components/parameters/userkey'
      - name: from
        in: query
        required: true
        description: Origin as `lon,lat`.
        schema:
          type: string
          example: 27.3711,43.256
      - name: to
        in: query
        required: true
        description: Destination as `lon,lat`.
        schema:
          type: string
          example: 128.345,-34.223
      - name: gateways
        in: query
        description: Comma-separated list of allowed gateways (suez, panama, kiel, oresund, messina, corinth, malacca, drake, magellan, northeast, northwest).
        schema:
          type: string
      - name: ECA
        in: query
        description: Emission Control Area preference.
        schema:
          type: string
          enum:
          - allow
          - deny
          - minimize
      - name: EPSG3857
        in: query
        description: Set to 1 to return coordinates in WebMercator (EPSG:3857).
        schema:
          type: integer
          enum:
          - 0
          - 1
      responses:
        '200':
          description: GeoJSON Feature describing the computed route.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DistanceResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '402':
          $ref: '#/components/responses/PaymentRequired'
components:
  responses:
    Unauthorized:
      description: Invalid or missing userkey.
    PaymentRequired:
      description: Insufficient credits or expired access.
  parameters:
    userkey:
      name: userkey
      in: query
      required: true
      description: Personal API key issued by VesselFinder.
      schema:
        type: string
  schemas:
    DistanceResponse:
      type: object
      description: GeoJSON Feature describing the computed route.
      properties:
        type:
          type: string
          example: Feature
        properties:
          type: object
          properties:
            Crossing:
              type: array
              items:
                type: string
              description: Ordered list of canals, straits, and passages crossed.
            Distance:
              type: number
              description: Route length in meters.
            DistanceECA:
              type: number
              description: Distance spent in ECA zones in meters.
        geometry:
          type: object
          properties:
            type:
              type: string
              example: LineString
            coordinates:
              type: array
              items:
                type: array
                items:
                  type: number
  securitySchemes:
    UserKey:
      type: apiKey
      in: query
      name: userkey