MCP Client

What is MCP Client?

MCP Client is a Python application that interacts with Model Context Protocol (MCP) servers using Server-Sent Events (SSE). It is designed for developers who need real-time, persistent communication with MCP servers.

How to use MCP Client?

Install dependencies with pip install -r requirements.txt, then run python client_sse.py. Set the environment variables MCP_SERVER_URL, MCP_API_KEY, and ANTHROPIC_API_KEY before starting.

Key features of MCP Client

• Real‑time bidirectional communication via Server‑Sent Events
• Automatic session management with persistent connections
• Dynamic tool discovery and integration from the server
• Streaming responses for long‑running tool executions
• Robust error handling, timeouts, and reconnection attempts

Use cases of MCP Client

• Establishing persistent SSE connections to MCP servers for live updates
• Discovering and calling tools exposed by an MCP server in real time
• Executing tool calls and receiving streaming results through the SSE channel

FAQ from MCP Client

How does MCP Client use Server‑Sent Events (SSE)?

The client connects to an MCP server’s /sse endpoint, receives a session ID and a list of available tools via SSE events, and then sends tool calls via POST requests. Results and errors stream back over the same persistent connection.

What environment variables are required to run MCP Client?

You need MCP_SERVER_URL (server URL), MCP_API_KEY (for authentication), and ANTHROPIC_API_KEY (for Claude integration).

Does MCP Client support automatic reconnection if the connection drops?

Yes, the client implements automatic reconnection attempts and connection timeout detection to maintain a reliable session.

What programming language and libraries does MCP Client use?

MCP Client is written in Python and uses the aiohttp library for async HTTP and SSE handling.

Is MCP Client free and open source?

The README does not mention pricing or licensing. It is distributed as a Python script with a requirements file, but no license or cost information is provided.