FleetMon Vessels Near Position API

openapi: 3.2.0
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'
servers:
- url: https://apiv2.fleetmon.com/
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
        in: query
        name: lat
        required: true
        schema:
          type: number
          format: float
      - description: Longitude in decimal notation for requested position
        in: query
        name: lon
        required: true
        schema:
          type: number
          format: float
      - description: Radius around the requested vessel in meter. Default and maximum radius is 2500 meter.
        in: query
        name: radius
        required: false
        schema:
          type: integer
          format: int64
      - 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
        schema:
          type: boolean
          default: false
      responses:
        '200':
          description: Vessels near position
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/vessels_near_position'
        '401':
          description: The server could not verify that you are authorized to access the URL.
          x-example-object:
            code: 401
            description: The server could not verify that you are authorized to access the URL requested.
            message: Unauthorized
            status: error
          content:
            application/json:
              schema:
                allOf:
                - $ref: '#/components/schemas/error-message-response'
                - title: response-status-401
                xml:
                  name: response
                  namespace: https://apiv2.fleetmon.com
                  x-extra-attributes:
                    timestamp:
                      type: date-time
        '403':
          description: The provided credentials were correct but the API is not yet fully configured.
          x-example-object:
            code: 403
            description: The API is not yet fully configured.
            message: Forbidden
            status: error
          content:
            application/json:
              schema:
                allOf:
                - $ref: '#/components/schemas/error-message-response'
                - title: response-status-403
                xml:
                  name: response
                  namespace: https://apiv2.fleetmon.com
                  x-extra-attributes:
                    timestamp:
                      type: date-time
        '404':
          description: Requested item does not exist.
          x-example-object:
            code: 404
            description: The requested item was not found on the server.
            message: Not Found
            status: error
          content:
            application/json:
              schema:
                allOf:
                - $ref: '#/components/schemas/error-message-response'
                - title: response-status-404
                xml:
                  name: response
                  namespace: https://apiv2.fleetmon.com
                  x-extra-attributes:
                    timestamp:
                      type: date-time
        '405':
          description: The used HTTP method is not allowed for this URL.
          x-example-object:
            code: 405
            description: The method is not allowed for the requested URL.
            message: Method Not Allowed
            status: error
          content:
            application/json:
              schema:
                allOf:
                - $ref: '#/components/schemas/error-message-response'
                - title: response-status-405
                xml:
                  name: response
                  namespace: https://apiv2.fleetmon.com
                  x-extra-attributes:
                    timestamp:
                      type: date-time
        '422':
          description: A required parameter is missing or has a wrong structure.
          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
          content:
            application/json:
              schema:
                allOf:
                - $ref: '#/components/schemas/error-message-response'
                - title: response-status-422
                xml:
                  name: response
                  namespace: https://apiv2.fleetmon.com
                  x-extra-attributes:
                    timestamp:
                      type: date-time
        '429':
          description: The client requested the resource too many times. (rate limit)
          x-example-object:
            code: 429
            description: Only 200 requests per 30 days are allowed for this endpoint.
            message: Too Many Requests
            status: error
          content:
            application/json:
              schema:
                allOf:
                - $ref: '#/components/schemas/error-message-response'
                - title: response-status-429
                xml:
                  name: response
                  namespace: https://apiv2.fleetmon.com
                  x-extra-attributes:
                    timestamp:
                      type: date-time
      security:
      - apikey: []
      - apikey_authorization_header: []
      - apikey_header: []
      summary: ''
      tags:
      - Vessels Near Position
components:
  schemas:
    vessels_near_position:
      items:
        $ref: '#/components/schemas/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
          - 'null'
          xml:
            x-add-datatype: true
        distance_to_vessel:
          description: Distance from vessel to requested vessel in meter
          format: int64
          type: integer
          xml:
            x-add-datatype: true
        latitude:
          description: Latitude share of latest position reported by AIS (position message)
          format: float
          type: number
          xml:
            x-add-datatype: true
        length:
          description: length of vessel in meter via AIS (static message)
          format: int64
          type:
          - number
          - 'null'
          xml:
            x-add-datatype: true
        longitude:
          description: Longitude share of latest position reported by AIS (position message)
          format: float
          type: number
          xml:
            x-add-datatype: true
        mmsi:
          description: MMSI sent by vessel
          format: int64
          type: number
          xml:
            x-add-datatype: true
        name:
          description: Vessel name by FleetMon
          type:
          - string
          - 'null'
          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
          xml:
            x-add-datatype: true
        speed:
          description: Latest speed received via AIS (position message) in knots
          format: float
          type:
          - number
          - 'null'
          xml:
            x-add-datatype: true
        true_heading:
          description: Latest true heading of keel (hull) via AIS (position message) in degree
          format: float
          type:
          - number
          - 'null'
          xml:
            x-add-datatype: true
        type_class:
          description: Vessel class sent by AIS
          type:
          - string
          - 'null'
          xml:
            x-add-datatype: true
        width:
          description: width of vessel in meter via AIS (static message)
          format: int64
          type:
          - number
          - 'null'
          xml:
            x-add-datatype: true
      required:
      - latitude
      - longitude
      - mmsi
      - received
      title: vessels_near_position
      type: object
      xml:
        name: item
        x-add-datatype: true
  securitySchemes:
    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