"Resources or services available for free" matching MCP connectors:
Matching Connector Tools:
Mediterranean marine, nautical, sailing: forecasts, tides, sea routes, anchorages, POIs for AI.
Swiss weather data for AI assistants — forecasts, measurements, stations, pollen.
Weather, climate, terrain, fire and flood risk data for any point or polygon on Earth. Free tier.
US weather & geo for AI agents: forecasts, alerts, earthquakes, elevation, geocoding. No keys.
Keyless open data for 84 German cities: 12 lean read-only MCP tools covering 67 data types.
257 tools across 56 US public-data domains: sanctions, FMCSA, SEC, courts, energy. Free tier.
Japan, Korea and UK official data for AI agents: filings, FX, weather, travel, patents, AI tools.
Pay-per-use weather, environment, finance, and on-chain intelligence tools for AI agents via x402.
Where is it sunny? Monthly sunshine scores, temps, rain and sea temp for 3,833 destinations.
Search Australian campsites, caravan parks and free camps; weather, gear, road trips and booking.
Real-time surf, weather, trail status, volcano, ocean safety, and restaurants for Hawaii.
Surf trip planner: live 0-100 Strike Scores, 10-day forecasts, and trip picks for 1,100+ spots.
Live ski snow, multi-model forecasts, powder rankings & a grounded Answer Engine for 500+ resorts.
EPW/DDY weather files - TMY/AMY/CMIP6 morphing, UHI, events, smoke. 3 of 4 tools anon-free.
Hosted weather data MCP for discovery, validation, and OAuth-protected GribStream queries.
Read-only airport delay, weather, and 24h forecast tools for AI assistants. Airport-level only.
EPA AirNow MCP — official US real-time AQI + forecast (free key)
Authoritative time intelligence — current time in 597 timezones, sunrise/sunset/twilight times by location (US Naval Observatory), and moon phase calendar. Essential for scientific, agricultural, and scheduling agents.
UK personal air quality advice and daily exposure assessment. Pairs with Hermes for live data.