MCP Servers

weather-mcp-server

A no-API-key-required MCP server that wraps Open-Meteo APIs to provide geocoding and weather forecast data, enabling city lookups and multi-day forecasts through tools, resources, and prompts.

Category

README

Weather MCP Server

An MCP server wrapping the Open-Meteo geocoding and forecast APIs. No API key required.

Install

pip install -r requirements.txt

Run

Stdio (default, for local agent clients):

python server.py

SSE (for remote/hosted clients):

python server.py sse
# serves on http://localhost:8000/sse

Tool reference

Tool	Args	Returns
`geocode_city`	`city: str`	`{name, country, latitude, longitude}`
`get_forecast`	`latitude: float, longitude: float, days: int = 3`	`{forecast: [{date, condition, temp_max_c, temp_min_c, precipitation_mm}, ...]}`
`get_weather_by_city`	`city: str, days: int = 3`	`{location, forecast}` — geocode + forecast in one call

Resource

weather://{city} — read-only current-conditions summary for a city, e.g. weather://Tokyo.

Prompt

weather_report(city: str) — template that asks an agent to produce a short, friendly 3-day weather report for a city using get_weather_by_city.

Connect from an Agents SDK client

from agents import Agent, Runner
from agents.mcp import MCPServerStdio, MCPServerStdioParams

async with MCPServerStdio(
    name="Weather Tools",
    params=MCPServerStdioParams(command="python", args=["server.py"]),
) as weather_server:
    agent = Agent(
        name="Weather Assistant",
        instructions="Use the weather tools to answer the user's question.",
        mcp_servers=[weather_server],
    )
    result = await Runner.run(agent, "What's the weather in Tokyo this week?")
    print(result.final_output)

See client_stdio_test.py and client_sse_test.py for full runnable examples of each transport.

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