notifications.py

from mcp.server.fastmcp import Context, FastMCP
from mcp.server.lowlevel.server import NotificationOptions
from mcp.server.session import ServerSession

# Setup Server Capabilities
notification_options = NotificationOptions(prompts_changed=False, resources_changed=True, tools_changed=False)

mcp = FastMCP(name="Notifications Example", notification_options=notification_options)


@mcp.tool()
async def process_data(data: str, ctx: Context[ServerSession, None]) -> str:
    """Process data with logging."""
    # Different log levels
    await ctx.debug(f"Debug: Processing '{data}'")
    await ctx.info("Info: Starting processing")
    await ctx.warning("Warning: This is experimental")
    await ctx.error("Error: (This is just a demo)")

    # Notify about resource changes
    await ctx.session.send_resource_list_changed()

    return f"Processed: {data}"