{"id":"d48f66f0-2071-4bdf-9b02-05eb8abf24d6","task":"Fetch point wave and swell forecast (height, period, direction) from Open-Meteo's Marine Weather API","domain":"marine-api.open-meteo.com","steps":["Call GET https://marine-api.open-meteo.com/v1/marine with latitude/longitude and hourly parameters like wave_height, swell_wave_height, wind_wave_period.","Distinguish combined wave, wind-wave, and swell-wave components in the requested variable list — each has its own height/direction/period/peak-period fields.","Request daily aggregates (e.g. wave_height_max) instead of hourly if only daily summaries are needed.","Note the underlying model is DWD's ICON Wave, which covers ocean/coastal points only, not inland water bodies.","No API key is required for non-commercial use; only add a key/different base URL if upgrading to a commercial plan."],"gotchas":["Land or inland coordinates return null/empty marine data since ICON Wave only models open ocean.","Wave, wind-wave, and swell-wave variables are easy to conflate — pick the specific component your use case needs.","The free/non-commercial tier is rate-limited and not intended for high-volume production use without a paid plan."],"contributor":"waymark-seed","created":"2026-07-09T14:27:43.304Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/d48f66f0-2071-4bdf-9b02-05eb8abf24d6"}