Open-Meteo is itself the product named in the request: a free, open-source weather API with no API key needed for non-commercial use, offering forecasts and archives from 30+ models 1. Alternatives that cover the same weather-data job include GribStream, which offers forecasts and historical actuals through one API 6, and Meteosource, which provides forecasts up to 30 days and historical data 4.
- 1
Open-Meteo.comopen-meteo.comverified and signed
Free open-source weather API offering forecasts and historical archives from 30+ national weather models, with no API key required for non-commercial use, exposed through a JSON GET /v1/forecast endpoint for 7-day forecasts by coordinates 1.
for agents: GET /v1/forecast
- 2
GribStream Live Forecasts & Historical Weather APIgribstream.comverified and signed
Provides global and regional forecasts, ensembles, and reanalysis actuals through one weather API, with an MCP server available 6.
official:MCP server · GribStream Weather MCP+1 community tools built for it
for agents: gribstream_query_timeseries · gribstream_query_runs · gribstream_get_dataset
- 3
Meteosource Weather APImeteosource.comverified and signed
Weather API giving minute-by-minute, hourly and daily forecasts up to 30 days plus historical weather data for any location 4.
for agents: point_point_get · map_map_get · time_machine_time_machine_get
Sources
- 1🌤️ Free Open-Source Weather API | Open-Meteo.comopen-meteo.com · read 2026-10-29
- 4Meteosource - The Global Weather API & Mapping Platform - current weather and forecast datameteosource.com · read 2026-10-29
- 6Live Forecasts & Historical Weather API | GribStreamgribstream.com · read 2026-10-29
For agents: the 10 actions behind this answer
GET /v1/forecast · Open-Meteo APIs verified and signed
7 day weather forecast for coordinates
get-weather · MCP Weather Server found in code, not yet checked
Tool to get the weather of a city
get_current_weather · business-links found in code, not yet checked
Get current weather information for a specific city
point_point_get · Interactive documentation for your Premium plan verified and signed
Returns weather data for a single point (geographic name or GPS)
providers-read · Cloudflare API verified and signed
Read Cloud Integration
gribstream_query_timeseries · GribStream.com Historical Weather Forecast API verified and signed
AUTH REQUIRED / DATA QUERY. Executes an authenticated /api/v2/{dataset}/timeseries request and returns actual weather/forecast data values. Use this tool, not the NO AUTH request-building or metadata tools, when the user asks to fetch, retrieve, download, return, or analyze weather values, CSV/JSON/
CurrentWeatherData · OpenWeatherMap API verified and signed
Call current weather data for one location.
· InfraNode website read, tools not yet checked
Kostenlose, keylose Open-Data-API und MCP-Server für 84 deutsche Großstädte: Wetter, Luftqualität, ÖPNV-Echtzeit, Strompreis und mehr. Ohne API-Schlüssel, kommerziell nutzbar.
structured-output · ai verified and signed
get_weather_map · Meteomatics verified and signed
Get a Meteomatics WMS weather map image for a layer, CRS, and bounding box.
Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.