marine.ocean.swell
Hourly swell forecast at an ocean coordinate — swell wave height (m), swell direction (°), and swell period (s) for up to 16 days. Swell consists of wind-generated waves that have propagated far from their origin, typically with longer periods (>10s) and more regular patterns than wind-sea. High-...
This record as markdown: /tools/io-github-whiteknightonhorse-apibase/marine.ocean.swell.md
What marine.ocean.swell does on Apibase
AI agents call marine.ocean.swell 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.swell is rated Low
Tool retrieves ocean swell forecasts without modifying data or executing external operations.
From the tool's definition Hourly swell forecast at an ocean coordinate — retrieves weather data.
Attacks that exploit this kind of access
The rule that runs marine.ocean.swell 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.swell, this is the rule to start with:
marine.ocean.swell 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.swell call is checked against it from then on.
Questions about marine.ocean.swell
Hourly swell forecast at an ocean coordinate — swell wave height (m), swell direction (°), and swell period (s) for up to 16 days. Swell consists of wind-generated waves that have propagated far from their origin, typically with longer periods (>10s) and more regular patterns than wind-sea. High-period swell (>12s) is ideal for surfing; low-period swell (<6s) indicates local chop. Swell direction indicates where the swell is coming from (degrees clockwise from north). Useful for surf forecasting, sailing passage planning, and aquaculture site assessment. 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.swell 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.swell: 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.swell 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.swell 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.swell. 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.swell 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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