marine.ocean.forecast
Full hourly marine forecast at any ocean coordinate up to 16 days ahead. Returns all marine variables: significant wave height (m), mean wave direction (°), mean wave period (s), swell wave height (m), swell direction (°), swell period (s), and sea surface temperature (°C). Data is sourced from C...
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What marine.ocean.forecast does on Apibase
AI agents call marine.ocean.forecast to retrieve information from Apibase without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
latitude | number | Yes | Latitude of the ocean location in decimal degrees (e.g. 51.5 for English Channel, 48.5 for Bay of Biscay). Must be over open water — land coordinates return nul |
timezone | string | — | Timezone for the returned time values (e.g. "UTC", "Europe/London", "America/New_York"). Defaults to UTC. |
longitude | number | Yes | Longitude of the ocean location in decimal degrees (e.g. -14.0 for Atlantic, 2.3 for North Sea). |
forecast_days | integer | — | Number of days to forecast (1–16). Defaults to 7. Hourly data is returned for each day. |
Parameters from the server's own tool schema.
Why marine.ocean.forecast is rated Low
Tool retrieves historical and forecasted weather data with no side effects or modification capability.
From the tool's definition Full hourly marine forecast; returns marine variables; data sourced from reanalysis models
Attacks that exploit this kind of access
The rule that runs marine.ocean.forecast safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Apibase, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For marine.ocean.forecast, this is the rule to start with:
marine.ocean.forecast is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Apibase, apply this rule, and every marine.ocean.forecast call is checked against it from then on.
Questions about marine.ocean.forecast
Full hourly marine forecast at any ocean coordinate up to 16 days ahead. Returns all marine variables: significant wave height (m), mean wave direction (°), mean wave period (s), swell wave height (m), swell direction (°), swell period (s), and sea surface temperature (°C). Data is sourced from CMEMS ERA5 reanalysis and global wave models (ERA5-Ocean, MEPS, GFS). Ideal for offshore operations, ship routing, marine research, and multi-variable coastal planning. Supply latitude/longitude of an open-ocean or coastal point; land coordinates return null values. Source: Open-Meteo Marine API, CC BY 4.0, no authentication required. It is categorised as a Read tool in the Apibase MCP Server, which means it retrieves data without modifying state.
marine.ocean.forecast accepts 4 parameters: latitude, timezone, longitude, forecast_days. Required: latitude, longitude. The full parameter table on this page comes from the server's own tool schema.
Register the Apibase MCP server in PolicyLayer and add a rule for marine.ocean.forecast: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Apibase. Nothing to install.
marine.ocean.forecast is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the marine.ocean.forecast rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for marine.ocean.forecast. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
marine.ocean.forecast is provided by the Apibase MCP server (apibase-mcp-client). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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