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Open-Meteo MCP

A comprehensive MCP server providing access to Open-Meteo weather APIs for Large Language Models

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Data offered docs-verified: weather forecast up to 16 days · ERA5 historical weather from 1940 · air quality (PM2.5, PM10, ozone, NO2, pollen, European and US AQI, UV index) · marine waves, swell and sea surface temperature · ensemble forecasts · seasonal outlook from a few weeks to about 7 months · CMIP6 climate projections 1950 to 2050 · river discharge via GloFAS (flood_forecast) · geocoding · elevation
Coverage llm-inferred: Not stated for the server as a whole. GFS is global, DWD ICON focuses on Europe and MET Norway on Nordic countries. UK is not named. · 1940 to yesterday (ERA5 archive); CMIP6 projections 1950 to 2050
Resolution llm-inferred: Temporal: hourly, daily and 15-minute series. Spatial resolution not stated.
Formats llm-inferred: JSON · MCP stdio · MCP streamable HTTP
Access docs-verified: Free for non-commercial use; no API key needed for the Open-Meteo APIs. Server licence MIT. API_KEY applies only to the server's own HTTP transport.

Use cases llm-inferred: ERA5 rainfall and temperature history (weather_archive) for FRA or drainage baseline climatology · Forecast rainfall and wind for construction-phase site planning · GloFAS river discharge screening (flood_forecast) at site coordinates before gauge data review · CMIP6 climate projections (climate_projection) for climate-change allowances in drainage strategy
Audience llm-inferred: flood consultants · drainage engineers · hydrologists · planners · GIS analysts

Constraints llm-inferred: Docs cover free use for non-commercial purposes only; commercial consultancy use must be checked against Open-Meteo terms · ENTRY auth lists API_KEY, but the docs say no key is needed for Open-Meteo; API_KEY only protects HTTP mode · Model-specific tools are regional (ICON for Germany/Europe, MET Norway for Nordic countries); UK coverage is not named · GloFAS flood discharge is modelled, not gauge observations · Responses over 25,000 characters are truncated; narrow the date range or variables to get full data · Response cache is in-memory only and not persistent · Archive ranges ending within the last 5 days are still being backfilled by Open-Meteo · Tool argument names in example_tool_calls are inferred from Open-Meteo API conventions, not from DOCS · Docs give no maintenance or release-status information

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Metadata observed 14/10/2026 · editorial seed