aid: aisstream
url: https://raw.githubusercontent.com/api-evangelist/aisstream/refs/heads/main/apis.yml
name: AISStream
kind: company
description: AISStream.io is a free service that streams global real-time AIS
  (Automatic Identification System) vessel-tracking data over a WebSocket. Clients
  register for a free API key, open a secure WebSocket to
  "wss://stream.aisstream.io/v0/stream", and send a JSON subscription message
  declaring one or more geographic bounding boxes plus optional MMSI and
  message-type filters. The server then pushes a continuous stream of AIS
  messages - PositionReport, ShipStaticData, and the full set of ITU-R M.1371
  message types - each wrapped in an envelope carrying MessageType, MetaData,
  and the decoded Message. There is no REST API; the service is WebSocket-only.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Vessel Tracking
- AIS
- Maritime
- Ship Tracking
- Real-Time Data
- WebSocket
- Streaming
- Ships
- Maritime Data
- Location
created: '2026-07-12'
modified: '2026-07-12'
specificationVersion: '0.19'
apis:
- aid: aisstream:aisstream-ais-stream-api
  name: AISStream AIS Stream API
  tags:
  - AIS
  - Vessel Tracking
  - WebSocket
  - Streaming
  - Real-Time Data
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://aisstream.io/documentation
  baseURL: 'wss://stream.aisstream.io/v0/stream'
  properties:
  - url: https://aisstream.io/documentation
    type: Documentation
  - url: https://aisstream.io/documentation
    type: APIReference
  - url: asyncapi/aisstream-asyncapi.yml
    type: AsyncAPI
  - url: collections/aisstream.postman_collection.json
    type: PostmanCollection
  - url: collections/aisstream.opencollection.json
    type: OpenCollection
  - url: https://github.com/aisstream/ais-message-models
    type: SourceCode
  - url: https://github.com/aisstream/example
    type: SDK
  description: Real-time global AIS vessel-tracking stream delivered over a single
    WebSocket at "wss://stream.aisstream.io/v0/stream". The client connects, sends
    a JSON subscription message (APIKey plus BoundingBoxes and optional
    FiltersShipMMSI and FilterMessageTypes), and receives a continuous feed of AIS
    messages - each an envelope with MessageType, a free-form MetaData object, and
    the decoded Message keyed by its type (PositionReport, ShipStaticData, and the
    rest of the ITU-R M.1371 message set).
common:
- type: DomainSecurity
  url: security/aisstream-domain-security.yml
- type: Authentication
  url: authentication/aisstream-authentication.yml
- type: GitHubOrganization
  url: https://github.com/aisstream
- type: Website
  url: https://aisstream.io
- type: Documentation
  url: https://aisstream.io/documentation
- type: Plans
  url: plans/aisstream-plans-pricing.yml
- type: RateLimits
  url: rate-limits/aisstream-rate-limits.yml
- type: FinOps
  url: finops/aisstream-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com