# OhMyWind

> OhMyWind, an MCP server by ohmywind.fr, listed from the official MCP registry. Indexed, not reviewed: facts and our own checks, no score or ranking. Sailing passage planner for any coast, with high-precision tides on the French Atlantic.

- Canonical: https://www.anchorterminal.com/tools/ohmywind-sailing-planner
- Markdown: https://www.anchorterminal.com/tools/ohmywind-sailing-planner.md (~800 tokens)
- Slim: https://www.anchorterminal.com/tools/ohmywind-sailing-planner.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/tools/ohmywind-sailing-planner.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-05

# OhMyWind

> Indexed, not reviewed: facts from the official MCP registry and our own checks. No score, grade or rank, and not in the rankings until the panel reviews it. How the index works: https://www.anchorterminal.com/indexed/

- Kind: MCP server, by ohmywind.fr (https://ohmywind.fr)
- Listed because: It's published in the registry under ohmywind.fr, a namespace the registry only gives to whoever proves they control that domain.
- What the official MCP registry says: Sailing passage planner for any coast, with high-precision tides on the French Atlantic.

## Facts

- MCP registry: `fr.ohmywind/sailing-planner` 1.0.1
- Endpoint: https://mcp.ohmywind.fr/mcp (streamable HTTP)
- Source: https://github.com/qdonnars/ohmywind
- Website: https://ohmywind.fr
- GitHub stars: 10
- Registry entry updated: 2026-08-01

## Tools

- Tools it lists (4, about 3,841 tokens of context, `tools/list` without credentials over MCP 2025-11-25, checked 2026-10-04 22:25 UTC):
  - `read_me` (read-only): Return OhMyWind's calculation methodology as Markdown. Call this when the user asks how passage timing, complexity, or boat speed are computed (e.g. "comment…
  - `list_boat_archetypes` (read-only): List the 7 boat archetypes with descriptive metadata. The LLM (or user) maps a commercial model (e.g. "Sun Odyssey 32") to one of these archetypes from the…
  - `get_marine_forecast` (read-only): Fetch wind (and sea, when available) for a point and time window. Args: lat: latitude in degrees. lon: longitude in degrees. start: ISO-8601 datetime,…
  - `plan_passage` (read-only): (not repeated here: it reads like a rating or a usage claim)
- How its tools read to an agent (0 errors, 3 warnings, 2 notes, about 3,841 tokens; rules at https://www.anchorterminal.com/check.md; not part of the score):
  - warn TC07 plan_passage: the description is about 2,629 tokens
  - warn TC11 plan_passage: 3 parameters without a description: latest_departure, sweep_interval_hours, target_eta
  - warn TC22 plan_passage: the definition is about 3,075 tokens
  - note TC11 get_marine_forecast: parameters are documented in the description but not in the schema: end, lat, lon, models, start
  - note TC11 plan_passage: parameters are documented in the description but not in the schema: archetype, departure, efficiency, max_hs_m, min_upwind_twa_deg, model and 4 more

- JSON: https://www.anchorterminal.com/api/v1/tools/ohmywind-sailing-planner.json
- Being indexed says nothing about quality, and nobody can pay for it. Ask for a review: https://www.anchorterminal.com/builders/#claiming