FleetMon Vessels Near Position API

swagger: '2.0'
info:
  description: 'ARCHIVED SPECIFICATION - RETIRED API. This is the final publicly archived Swagger 2.0 definition of the FleetMon API (apiv2.fleetmon.com), preserved from the Internet Archive Wayback Machine (schema.json capture 2021-12-08; the developer portal at developer.fleetmon.com remained online through early 2025). FleetMon was acquired by Kpler in 2023, the FleetMon platform and API were phased out beginning January 2024 and migrated into MarineTraffic, and as of 2026 the fleetmon.com domain (including apiv2.fleetmon.com and developer.fleetmon.com) no longer resolves. None of the endpoints below are live. The successor surface is the MarineTraffic API portfolio / Kpler AIS (servicedocs.marinetraffic.com).


    --- Original description follows ---


    Welcome to our API reference!


    You can view JSON response samples in the area to the right.

    If you need help with the API, just [contact us](https://www.fleetmon.com/company/contact/).


    Follow us on [Facebook](https://www.facebook.com/fleetmon) and [Twitter](https://twitter.com/fleetmon) for the latest updates and news on the platform.


    With the use of the FleetMon API, you agree with the [Terms of Service](https://www.fleetmon.com/terms-of-service/).

    '
  title: FleetMon API Reference Basic Vessel Data Vessels Near Position API
  version: Version 2.4.2
  x-archived:
    status: retired
    retiredNote: FleetMon product offerings, logins, and the apiv2.fleetmon.com API were discontinued during the 2024 migration into MarineTraffic following the 2023 Kpler acquisition; fleetmon.com DNS no longer resolves as of 2026.
    archiveSource: http://web.archive.org/web/20211208160310/https://apiv2.fleetmon.com/schema.json
    archivedDeveloperPortal: http://web.archive.org/web/20250106234623/https://developer.fleetmon.com/reference/
    successor: https://servicedocs.marinetraffic.com/
    archivedBy: API Evangelist
    archivedDate: '2026-07-11'
host: apiv2.fleetmon.com
basePath: /
schemes:
- https
consumes:
- application/json
produces:
- application/json
tags:
- description: Vessels near requested position
  name: Vessels Near Position
  x-codename: vessels_near_position
  x-tag-group: Professional Monitoring
paths:
  /vessel/near/:
    get:
      description: ''
      operationId: get-vessels_near_position-detail
      parameters:
      - description: Latitude in decimal notation for requested position
        format: float
        in: query
        name: lat
        required: true
        type: number
      - description: Longitude in decimal notation for requested position
        format: float
        in: query
        name: lon
        required: true
        type: number
      - description: Radius around the requested vessel in meter. Default and maximum radius is 2500 meter.
        format: int64
        in: query
        name: radius
        required: false
        type: integer
      - default: false
        description: If `true` some extra attributes will be added to the response informing about usage and limits of this endpoint.
        in: query
        name: request_limit_info
        required: false
        type: boolean
      responses:
        '200':
          description: Vessels near position
          schema:
            $ref: '#/definitions/vessels_near_position'
        '401':
          description: The server could not verify that you are authorized to access the URL.
          schema:
            allOf:
            - $ref: '#/definitions/error-message-response'
            - title: response-status-401
            xml:
              name: response
              namespace: https://apiv2.fleetmon.com
              x-extra-attributes:
                timestamp:
                  type: date-time
          x-example-object:
            code: 401
            description: The server could not verify that you are authorized to access the URL requested.
            message: Unauthorized
            status: error
        '403':
          description: The provided credentials were correct but the API is not yet fully configured.
          schema:
            allOf:
            - $ref: '#/definitions/error-message-response'
            - title: response-status-403
            xml:
              name: response
              namespace: https://apiv2.fleetmon.com
              x-extra-attributes:
                timestamp:
                  type: date-time
          x-example-object:
            code: 403
            description: The API is not yet fully configured.
            message: Forbidden
            status: error
        '404':
          description: Requested item does not exist.
          schema:
            allOf:
            - $ref: '#/definitions/error-message-response'
            - title: response-status-404
            xml:
              name: response
              namespace: https://apiv2.fleetmon.com
              x-extra-attributes:
                timestamp:
                  type: date-time
          x-example-object:
            code: 404
            description: The requested item was not found on the server.
            message: Not Found
            status: error
        '405':
          description: The used HTTP method is not allowed for this URL.
          schema:
            allOf:
            - $ref: '#/definitions/error-message-response'
            - title: response-status-405
            xml:
              name: response
              namespace: https://apiv2.fleetmon.com
              x-extra-attributes:
                timestamp:
                  type: date-time
          x-example-object:
            code: 405
            description: The method is not allowed for the requested URL.
            message: Method Not Allowed
            status: error
        '422':
          description: A required parameter is missing or has a wrong structure.
          schema:
            allOf:
            - $ref: '#/definitions/error-message-response'
            - title: response-status-422
            xml:
              name: response
              namespace: https://apiv2.fleetmon.com
              x-extra-attributes:
                timestamp:
                  type: date-time
          x-example-object:
            code: 422
            description: The request was well-formed but was unable to be followed due to semantic errors.
            message: Unprocessable Entity
            status: error
        '429':
          description: The client requested the resource too many times. (rate limit)
          schema:
            allOf:
            - $ref: '#/definitions/error-message-response'
            - title: response-status-429
            xml:
              name: response
              namespace: https://apiv2.fleetmon.com
              x-extra-attributes:
                timestamp:
                  type: date-time
          x-example-object:
            code: 429
            description: Only 200 requests per 30 days are allowed for this endpoint.
            message: Too Many Requests
            status: error
      security:
      - apikey: []
      - apikey_authorization_header: []
      - apikey_header: []
      summary: ''
      tags:
      - Vessels Near Position
definitions:
  vessels_near_position:
    items:
      $ref: '#/definitions/vessels_near_position-item'
    properties:
      request_limit_info:
        description: Information about usage and limits of this endpoint. Included if query parameter `request_limit_info` is `true`
        properties:
          left_requests:
            description: Number of requests left at this moment to this endpoint. If not included there is no limit.
            type: integer
          max_requests:
            description: Maximum number of requests to this endpoint within 30 days. If not included there is no limit.
            type: integer
          used_requests:
            description: Number of requests to this endpoint within the last 30 days.
            type: integer
        required:
        - used_requests
        title: request-limit-info
        type: object
    title: vessels_near_position
    type: array
    xml:
      name: response
      namespace: https://apiv2.fleetmon.com
      wrapped: true
      x-extra-attributes:
        timestamp:
          type: date-time
  error-message-response:
    properties:
      code:
        description: correlates to the HTTP status code
        format: int32
        type: integer
        xml:
          x-add-datatype: true
      description:
        description: more detailed description
        type: string
        xml:
          x-add-datatype: true
      message:
        description: short error message
        type: string
        xml:
          x-add-datatype: true
      status:
        description: '"error"'
        example: error
        format: ascii
        type: string
        xml:
          x-add-datatype: true
    required:
    - status
    - message
    - description
    - code
    type: object
  vessels_near_position-item:
    properties:
      course_over_ground:
        description: Latest course over ground via AIS (position message) in degree
        format: int64
        type: number
        x-nullable: true
        xml:
          x-add-datatype: true
      distance_to_vessel:
        description: Distance from vessel to requested vessel in meter
        format: int64
        type: integer
        x-nullable: false
        xml:
          x-add-datatype: true
      latitude:
        description: Latitude share of latest position reported by AIS (position message)
        format: float
        type: number
        x-nullable: false
        xml:
          x-add-datatype: true
      length:
        description: length of vessel in meter via AIS (static message)
        format: int64
        type: number
        x-nullable: true
        xml:
          x-add-datatype: true
      longitude:
        description: Longitude share of latest position reported by AIS (position message)
        format: float
        type: number
        x-nullable: false
        xml:
          x-add-datatype: true
      mmsi:
        description: MMSI sent by vessel
        format: int64
        type: number
        x-nullable: false
        xml:
          x-add-datatype: true
      name:
        description: Vessel name by FleetMon
        type: string
        x-nullable: true
        xml:
          x-add-datatype: true
      nav_status:
        description: Latest navigation status reported via AIS (position message)
        type: string
        xml:
          x-add-datatype: true
      received:
        description: Latest position received in Zulu time format from AIS (position message)
        format: date-time
        type: string
        x-nullable: false
        xml:
          x-add-datatype: true
      speed:
        description: Latest speed received via AIS (position message) in knots
        format: float
        type: number
        x-nullable: true
        xml:
          x-add-datatype: true
      true_heading:
        description: Latest true heading of keel (hull) via AIS (position message) in degree
        format: float
        type: number
        x-nullable: true
        xml:
          x-add-datatype: true
      type_class:
        description: Vessel class sent by AIS
        type: string
        x-nullable: true
        xml:
          x-add-datatype: true
      width:
        description: width of vessel in meter via AIS (static message)
        format: int64
        type: number
        x-nullable: true
        xml:
          x-add-datatype: true
    required:
    - latitude
    - longitude
    - mmsi
    - received
    title: vessels_near_position
    type: object
    xml:
      name: item
      x-add-datatype: true
securityDefinitions:
  apikey:
    description: Auth via API-Key Query-Parameter
    in: query
    name: apikey
    type: apiKey
  apikey_authorization_header:
    description: 'Auth via API-Key in ''Authorization'' header field in the form ''Authorization: Token <apikey>'''
    in: header
    name: Authorization
    type: apiKey
  apikey_header:
    description: Auth via API-Key in 'Api-Key' header field
    in: header
    name: Api-Key
    type: apiKey
x-tagGroups:
- name: My
  tags:
  - My API Keys
  - My Client
  - My User Notification Setting
  - My User Alert Addresses
  - Login Token
- name: Vessels
  tags:
  - Vessel Search
  - Vessel Photo
  - Vessel Schedule
  - Next Port / ETA Calculation
  - Vessel History
  - Vessel Positions Only
  - Vessel Identity
  - Vessel Route To Next Port
  - Vessels Nearby
  - Vessels Near Position
  - Historical AIS Static Messages
  - Historical Track API
  - Vessel Positions with Extended Vessel Data
  - Port Calls per Vessel
  - Vessel Coarse Type
  - ETA Reports
  - Basic Vessel Data
  - Non AIS Vessel Particulars
  - Vessel Time to Port
  - Vessel Change Events
  - Voyage Planning
  - Vessel Dynamic AIS
- name: Ports
  tags:
  - Expected Port Arrivals
  - Vessels in Port
  - Port Search
  - Port Calls per Port
- name: Fleets
  tags:
  - Fleet Tracker
  - My Fleet Positions
  - Dry and Bulk Cargo Fleet
- name: Logistics
  tags:
  - Logistics
  - RoRo Ferry Terminal Demo
  - Vessel ETA & Destination Change Events
  - Terminals
  - Estimated Laytime - Specific Vessel
- name: Zone
  tags:
  - Regional AIS
  - Zone Call
  - Zone Information
  - User Zones
- name: Routing
  tags:
  - Route To Port
  - Distance To Port
  - Vessel Route To Next Port
  - Vessel Route From Last Port
- name: Weather & Water
  tags:
  - Weather
  - Water
  - Current