API de Navegação Marítima

Everything to connect is in one public repository: the OpenAPI specification, the data models, Python and JavaScript clients, an MCP server for Claude, Cursor, VS Code, Windsurf and Zed, and a GitHub Action that checks a route against the warnings in force. The endpoints stay the ones below; the kit is the way in.

• Editors and agents: add the MCP server and ask in plain words; the tools are search_warnings, warnings_near, route_check, navareas and feeds.
• Code: python/sealagom.py and js/sealagom.mjs, no dependencies beyond requests or fetch; generate any other language from openapi.yaml.
• No-code and agents: import sealagom.com/openapi.json into n8n, Make, Zapier, Pipedream, Postman, ChatGPT actions or LangChain. Send the key as X-API-Token or Authorization: Bearer.
• Routes: POST /api/v2/route/ with a route file or waypoints, or the drop link /api/v2/drop/<key>/route/ for tools that can only POST a file.
• Sky view: GET /api/v2/sky/link/?vessel= (or mmsi, warning and region, port, locode, lat and lon) gives a ready link that stands there in the sky view; POST /api/v2/sky/route/ takes a route and gives its sky link, drawn on the sea, with the RTZ and GPX. Section 20 of the README has the calls. Not for navigation.
• CI: the Action fails a build when a critical warning lies on a route kept in the repository.
• Scripts and agents paying for themselves: POST /api/agent/checkout/, crypto, the key once paid (in the profile when the e-mail already has an account).

API v2 usa o mesmo token, planos e contabilização de requisições da v1. Tudo sob /api/v1/ continua funcionando exatamente como antes, então integrações existentes não precisam de alteração. v2 adiciona:

• Uma lista de todos os avisos: GET /api/v2/messages/, NAVAREA e costeiros juntos, do mais recente para o mais antigo, cada mensagem com sua região, país e status de arquivo.
• Filtros de mensagem nos endpoints de região: /api/v2/navarea/ and /api/v2/coastal/ respondem como v1 e também aplicam date_from, date_to, keyword and has_coordinates às mensagens que retornam.
• Configurações salvas em cada token: escolha um token em Profile > API > API v2 builder, construa a resposta com menus e uma pré-visualização ao vivo, e salve. Toda chamada /api/v2/ com esse token retorna essa forma; chamadas /api/v1/ ignoram as configurações salvas e respondem exatamente como antes.
• prompt filter (Full API):descreva em suas próprias palavras os avisos que um token deve retornar, por exemplo "only space debris warnings around the USA".
• Integrate: the kit on GitHub (OpenAPI spec, clients, MCP server, Action) is the way in; a README.md per token, with its settings, plan and every parameter and field, is there for any program that wants one file.
• Settings file:instead of ticking options, ask LagoPal (with the README) for a settings file: a small JSON file with the token's endpoint, parameters and prompt. Load it on Profile > API (Load settings file); it fills the builder so you can check the live preview before saving. Download settings file gives the current settings in the same form. JSON Schema: /api/public/api-settings-schema/.

GET /api/v2/messages/

Campos ou filtros que seu plano não inclui são deixados de fora e listados em meta.warnings, nunca um erro.

content é o texto conforme transmitido; content_en is the English text (the official English version or a machine translation) for sources that broadcast in another language, such as China or Turkey, and source_language nomeia a língua original.

Os US Coast Guard Local Notices to Mariners (10 districts, updated weekly) são regiões costeiras intituladas US Coast Guard LNM, country US. They are not analysed, so their automatic fields are empty; each district also has one message, number LNMxx-DISCREPANCIES, listando seus auxílios à navegação com uma discrepância.

curl "https://www.sealagom.com/api/v2/messages/?country=France&include_coordinates=true&include_ai_analysis=true" \
  -H "X-API-Token: YOUR_API_TOKEN"

{
  "count": 42,
  "page": 1,
  "page_size": 50,
  "next": null,
  "previous": null,
  "results": [
    {
      "scope": "coastal",
      "region_id": 57,
      "region_title": "FRANCE Atlantic",
      "country": "France",
      "is_archived": false,
      "archived_on": null,
      "id": 90211,
      "number": "AVURNAV 1234/26",
      "content": "BAY OF BISCAY. DRIFTING BUOY ...",
      "content_en": "BAY OF BISCAY. DRIFTING BUOY ...",
      "source_language": "en",
      "added_on": "2026-09-27T08:10:00Z",
      "coordinates": ["45-10.0N 002-05.0W"],
      "ai_analysis": { "headline": "...", "severity": "moderate", "valid_until": null }
    }
  ]
}

Configurações salvas em um token

• Um token, uma área: each token keeps its own endpoint and parameters. Need a second shape (say France coastal with coordinates, and a worldwide feed)? Create a second token.
• Toda opção é mostrada, Inclui as Full API, com o plano que cada uma exige. Salvar requer um plano API ativo.
• URL tem prioridade: qualquer parâmetro que você coloque na URL substitui o valor salvo para essa chamada; ?settings=off faz uma chamada simples.
• Períodos relativos: "últimos 30 dias" envia date_from como hoje menos 30 dias em toda chamada.
• As respostas trazem um X-API-Token-Settings header nomeando o token cujas configurações foram aplicadas.

Ice feed: GET /api/v2/ice/

• Every warning about ice at sea, from NAVAREA, coastal and NAVTEX sources: icebergs and iceberg limits, sea ice, ice edge, vessel icing and freezing spray, ice reports, icebreaker operations and ice navigation rules. An model reads each warning that mentions ice and keeps only those really about it, with its kind in ice.type.
• Positions, shapes (iceberg limit lines, ice areas) and the analysis are included by default. ?output=geojson retorna um GeoJSON FeatureCollection, uma feature por shape, pronto para verificações de rota e sobreposição em cartas.
• ice_type narrow s it: iceberg, sea_ice, ice_edge, icing, ice_report, icebreaker, ice_navigation, other_ice (repeat or comma-separate). Every /api/v2/messages/ parameter also works, and /api/v2/messages/?topic=ice é o mesmo feed.
• Plano Full API, ou uma licença de feed de gelo (anual, faturada): contate-nos.

curl "https://www.sealagom.com/api/v2/ice/?output=geojson&ice_type=iceberg,ice_edge" -H "X-API-Token: YOUR_API_TOKEN"

Themed feeds: GET /api/v2/feeds/<feed>/

• Ready-made feeds built from the category the analysis gives every warning: military exercises and firing, rocket launches and space debris, cable and pipeline work, offshore works and rigs, surveys, wrecks and drifting hazards, aids to navigation, search and rescue, security and restricted areas.
• Same output as the ice feed: positions, shapes and the analysis by default, the category in feed.category, ?output=geojson for a FeatureCollection and ?category=para manter apenas algumas das categorias de um feed. Todo parâmetro /api/v2/messages/ também funciona, e /api/v2/messages/?topic=military é o mesmo feed.
• Only warnings with an analysis are included. GET /api/v2/feeds/ (não requer token) lista cada feed com quantos de seus avisos estão em vigor.
• Plano Full API, ou licença de feed para um único feed (anual, faturado): contate-nos.
• Free and without a token, for feed readers and scripts: RSS at /feeds/warnings.xml, /feeds/navarea/<id>.xml and /feeds/coastal/<id>.xml; the same three as Atom (.atom) and JSON Feed 1.1 (.json); plain text at /feeds/warnings.txt. The newest 100 warnings, text only, a warning keeps its id when it is updated. Region pages carry the feed links in their head, so a reader finds the feed from the page address.

Loading feeds…

curl "https://www.sealagom.com/api/v2/feeds/military/?output=geojson&navarea_id=3" -H "X-API-Token: YOUR_API_TOKEN"

prompt filter

• Write what you want in plain words on the token (Full API plan). When you save, a model checks every warning in force against it; each new warning is checked within about 10 minutes of arriving.
• /api/v2/messages/ chamadas com esse token então retornam apenas os avisos correspondentes. Um aviso que correspondeu enquanto estava em vigor permanece correspondente depois de arquivado.
• A resposta adiciona meta.prompt_filter com o prompt, seu status (matching logo após salvar, ready depois) e quantos avisos corresponderam. ?prompt_filter=off ignora-o por uma chamada.
• The filter can miss or over-include a warning. Use it to narrow a feed, not as the only safety check; the official broadcast stays the authority.

# Token with saved settings: nothing else needed
curl "https://www.sealagom.com/api/v2/messages/" -H "X-API-Token: YOUR_API_TOKEN"

# Same token, override the period for one call
curl "https://www.sealagom.com/api/v2/messages/?date_from=2026-09-01" -H "X-API-Token: YOUR_API_TOKEN"

# Token with the prompt "only space debris warnings around the USA"
{
  "count": 3,
  "results": [ ... ],
  "meta": {
    "prompt_filter": {
      "prompt": "only space debris warnings around the USA",
      "status": "ready",
      "matched": 3
    }
  }
}