API de Navegación 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 el mismo token, planes y contabilización de peticiones que v1. Todo bajo /api/v1/ sigue funcionando exactamente como antes, por lo que las integraciones existentes no necesitan cambios. v2 añade:

• Una lista de todos los avisos: GET /api/v2/messages/, NAVAREA y costeros juntos, del más reciente al más antiguo, cada mensaje con su región, país y estado de archivo.
• Filtros de mensajes en los endpoints de región: /api/v2/navarea/ and /api/v2/coastal/ responden como v1 y además aplican date_from, date_to, keyword and has_coordinates a los mensajes que devuelven.
• Ajustes guardados en cada token: elija un token en Profile > API > API v2 builder, construya la respuesta con menús y una vista previa en vivo, y guarde. Cada llamada /api/v2/ con ese token devuelve esa forma; las llamadas /api/v1/ ignoran los ajustes guardados y responden exactamente como antes.
• prompt filter (Full API):describa en sus propias palabras los avisos que un token debería devolver, por ejemplo "solo avisos de basura espacial alrededor de 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/

Los campos o filtros que su plan no incluye se omiten y se listan en meta.warnings, nunca un error.

content es el texto tal como se emitió; 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 nombra el idioma original.

Los Local Notices to Mariners de la US Coast Guard (10 distritos, actualizados semanalmente) son regiones costeras tituladas 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, que lista sus ayudas a la navegación con una discrepancia.

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 }
    }
  ]
}

Ajustes guardados en un token

• Un token, una forma: 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.
• Cada opción se muestra, Incluye los de Full API, con el plan que necesita cada uno. Guardar requiere un plan API activo.
• La URL prevalece: cualquier parámetro que pongas en la URL reemplaza el valor guardado para esa llamada; ?settings=off hace una llamada simple.
• Periodos relativos: "últimos 30 días" envía date_from como hoy menos 30 días en cada llamada.
• Las respuestas llevan un X-API-Token-Settings encabezado que nombra el token cuyas configuraciones se aplicaron.

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 devuelve un GeoJSON FeatureCollection, una feature por forma, listo para comprobaciones de ruta y superposición en cartas.
• ice_type lo limita: iceberg, sea_ice, ice_edge, icing, ice_report, icebreaker, ice_navigation, other_ice (repetir o separar por comas). También funcionan todos los parámetros de /api/v2/messages/, y /api/v2/messages/?topic=ice es el mismo feed.
• Plan Full API, o una licencia para el feed de hielo (anual, facturada): contáctanos.

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 para un FeatureCollection y ?category=para conservar solo algunas categorías de un feed. También funcionan todos los parámetros de /api/v2/messages/, y /api/v2/messages/?topic=military es el mismo feed.
• Only warnings with an analysis are included. GET /api/v2/feeds/ (no se necesita token) lista cada feed con cuántos de sus avisos están en vigor.
• Plan Full API, o una licencia de feed para un único feed (anual, facturada): contáctanos.
• 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.

Cargando fuentes…

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/ las llamadas con ese token devolverán entonces solo los avisos que coincidan. Un aviso que coincidió mientras estaba en vigor sigue coincidiendo después de archivado.
• La respuesta añade meta.prompt_filter con el prompt, su estado (matching justo después de guardar, ready después) y cuántos avisos coincidieron. ?prompt_filter=off lo omite para una llamada.
• 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
    }
  }
}