4.2 — Building an MCP Server Step-by-Step

Step 1: Install and Scaffold

# Install the MCP Python SDK
pip install mcp

# Project structure
my-crm-server/
├── server.py          # Main MCP server
├── tools/
│   ├── accounts.py    # Account management tools
│   └── tickets.py     # Ticket tools
├── resources/
│   └── contracts.py   # Contract resources
├── auth.py            # Auth middleware
└── pyproject.toml

Step 2: Define Your Server with FastMCP

from mcp.server.fastmcp import FastMCP

# Create server with metadata
mcp = FastMCP(
    "crm-server",
    version="1.2.0",
    description="CRM integration for account and ticket management"
)

Step 3: Define Tools (Model-Callable Functions)