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robertn702MCP SERVER

OpenWeatherMap

Current conditions, forecasts down to the minute, air quality and geocoding from OpenWeatherMap.

by robertn702 ↗Weather & Environmental ConditionsCommunity

LABSCO SUMMARY

The forecast granularity is what you are choosing here.

Most weather servers stop at current conditions and a daily outlook. Minute-level precipitation and an alerts feed with severity are the two that change what an agent can answer — "will it rain before I leave" and "is there a warning in force" are different questions from "what is the weather like". The HTTP transport carrying the key per request rather than per process is also worth noting if several people share one deployment.

What it is

A weather server covering the OpenWeatherMap family of endpoints — observations, several forecast horizons, active alerts, air pollution, and the geocoding needed to turn a place name into the coordinates the rest of the calls want.

What you get

  • get-current-weather for conditions now, and get-weather-forecast for five days in three-hour steps
  • get-hourly-forecast out to 48 hours and get-daily-forecast out to 8 days with temperature ranges and astronomical data
  • get-minutely-forecast for precipitation minute by minute over the next hour
  • get-weather-alerts for active warnings with severity
  • get-current-air-pollution for the live index and pollutant readings, get-air-pollution for historical and forecast air quality
  • geocode-location turns a place name into coordinates and get-location-info turns coordinates back into a place
  • get-onecall-weather returns several forecast horizons in a single call

Requirements

The npm package mcp-openweathermap, version 0.1.3, run over npx; Bun if you build from source. An OpenWeatherMap API key, free to obtain. Over stdio the key goes in OPENWEATHER_API_KEY; over HTTP it travels as a bearer token in the request headers instead and no environment variable is needed. MCP_TRANSPORT switches between stdio and httpStream, with PORT defaulting to 3000 and MCP_ENDPOINT to /stream.

Setup effort

One command plus a key — npx mcp-openweathermap, then supply credentials

See installation options