MCP Hello World Server

A simple Hello World MCP (Model Context Protocol) server built with the FastMCP framework in Python using HTTP transport.

Prerequisites

• Python 3.10 or higher

Related MCP server: Echo Hello MCP Server

Install

# Install uv
curl -LsSf https://astral.sh/uv/install.sh | sh

# Create virtual environment and install dependencies
uv sync

# For development dependencies
uv sync --dev

Usage

Running the Server

Using Docker (Production)

docker build -t mcp-hello:latest .
docker-compose up -d

Using uv (Development)

# Run the server using uv (HTTP on port 8000)
uv run python -m mcp_hello.server

# Custom host/port using environment variables
MCP_HOST=localhost MCP_PORT=3000 uv run python -m mcp_hello.server

Accessing the HTTP Server

• Default: http://0.0.0.0:8000

• Local access: http://localhost:8000

• Custom: Set MCP_HOST and MCP_PORT environment variables

Available Tools

1. say_hello

Generate greetings in different languages.

Parameters:

• name (str, optional): Name to greet (default: "World")

• language (str, optional): Language code (default: "en")

Supported languages:

• en - English

• es - Spanish

• fr - French

• de - German

• it - Italian

• pt - Portuguese

• ru - Russian

• ja - Japanese

• ko - Korean

• zh - Chinese

Example:

{
  "tool": "say_hello",
  "arguments": {
    "name": "Alice",
    "language": "es"
  }
}

Response:

{
  "greeting": "¡Hola, Alice!",
  "language": "es",
  "name": "Alice",
  "message": "Greeting generated successfully in es"
}

2. get_server_info

Get information about the server capabilities.

Parameters:

None

Response:

{
  "name": "Hello World MCP Server",
  "version": "1.2.0",
  "description": "A simple hello world MCP server using FastMCP",
  "capabilities": [
    "greeting generation",
    "multi-language support",
    "server information"
  ],
  "supported_languages": ["en", "es", "fr", "de", "it", "pt", "ru", "ja", "ko", "zh"]
}

Available Resources

1. file://hello-world

A simple hello world message resource.

2. file://server-status

Current server status and available tools/resources.

Example Client Usage

# First, start the server in one terminal
uv run python -m mcp_hello.server

# Then in another terminal, run the HTTP client example
uv run python mcp_hello/http_client_example.py

Environment Variables

The server supports the following environment variables:

• MCP_HOST: Server host address (default: 0.0.0.0)

• MCP_PORT: Server port number (default: 8000)

Example:

MCP_HOST=localhost MCP_PORT=3000 uv run python -m mcp_hello.server

License

This project is licensed under the terms specified in the LICENSE file.

Reference