A
licenseB
qualityD
maintenanceEnables AI agents to fetch real-time weather data for any location using the OpenWeatherMap API. Demonstrates how to build a simple MCP server that exposes weather information as a tool for LLMs.
1
GPL 3.0
MCP LangChain Weather Agent
by aboomar26
Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@MCP LangChain Weather Agentwhat's the weather in Tokyo?"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
MCP LangChain Weather Agent
A simple weather MCP server connected to a LangGraph agent. The agent calls the weather tool to fetch live weather for any city.
Setup
Install dependencies:
pip install -r requirements.txtCreate a
.envfile in the project root:
OPENROUTER_API_KEY=your_api_key_hereRelated MCP server: Weather MCP
Usage
Start the MCP server (runs on http://127.0.0.1:8000):
python weatherserver.pyIn a second terminal, run the agent client:
python client.pyThe client connects to the weather MCP server, loads the weather tool, and asks the LLM about the weather.
Files
File | Description |
| MCP server with a |
| LangGraph agent that uses the MCP weather tool |
| Python dependencies |
How it works
User asks a question like "what's the weather in Tokyo?"
The agent calls the
weatherMCP toolThe server geocodes the city name and fetches current weather from Open-Meteo
The agent returns the result to the user
This server cannot be installed
Maintenance
–Maintainers
–Response time
–Release cycle
–Releases (12mo)
Commit activity
Resources
Unclaimed servers have limited discoverability.
Looking for Admin?
If you are the server author, to access and configure the admin panel.
Related MCP Servers
- Alicense-qualityDmaintenanceA MCP server for querying real-time weather information for any city worldwide using the free Open-Meteo API, supporting CLI and integration with AI clients like Claude and Cursor.21MIT
- Flicense-qualityDmaintenanceAn MCP server that provides weather and web search tools, orchestrated by a LangGraph agent with OpenAI for natural language interaction.8
- Flicense-qualityCmaintenanceA proof-of-concept MCP server that provides weather information using the Open-Meteo API, with tools for greeting, getting weather by coordinates, and by location name.
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