io.github.oceanmodeling/ww3-mcp
NOAA WW3 MCP Server
GFS-Wave (WAVEWATCH III) forecasts and NDBC buoy wave observations
alive probed 2026-10-15
9tools
4.5ktokens in Claude Opus 5.5
4.6ktokens in Claude Code
2.3 %of a 200k context window
2.6ko200k_base estimate
3.0 sto initialize
11 msto list tools
- Run it
- uvx ww3-mcp==0.1.2 (stdio, probed in a container with the network off)
- Host
- pypi.org
- Reports itself as
- ww3_mcp 1.30.0
- Capabilities
- experimental, prompts, resources, tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-15. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/oceanmodeling/ocean-mcp
- Registry
- active, updated 2026-10-01 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| ww3_get_forecast_at_point | 451 | 17 % |
| ww3_compare_forecast_with_buoy | 390 | 15 % |
| ww3_get_regional_summary | 375 | 14 % |
| ww3_get_point_snapshot | 332 | 13 % |
| ww3_list_cycles | 271 | 10 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.oceanmodeling/ww3-mcp)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.