MCP Weather Server

SSE-based Server and Client for MCP

This demonstrates a working pattern for SSE-based MCP servers and standalone MCP clients that use tools from them. Based on an original discussion here.

Usage

Note: Make sure to supply ANTHROPIC_API_KEY in .env or as an environment variable.

Why?

This means the MCP server can now be some running process that agents (clients) connect to, use, and disconnect from whenever and wherever they want. In other words, an SSE-based server and clients can be decoupled processes (potentially even, on decoupled nodes). This is different and better fits "cloud-native" use-cases compared to the STDIO-based pattern where the client itself spawns the server as a subprocess.

Installing via Smithery

To install SSE-based Server and Client for Claude Desktop automatically via Smithery:

Server

weather.py is a SSE-based MCP server that presents some tools based on the National Weather Service APIs. Adapted from the MCP docs' example STDIO server implementation.

By default, server runs on 0.0.0.0:8080, but is configurable with command line arguments like:

Client

client.py is a MCP Client that connects to and uses tools from the SSE-based MCP server. Adapted from the MCP docs' example STDIO client implementation.

By default, client connects to SSE endpoint provided in the command line argument like: