FastMCP Tools Calculator

from fastmcp import FastMCP, Context mcp = FastMCP( name="Simple Calculator Stdio", version="1.0.0", tools=[], auth=None, # OAuthProvider \ TokenVerifier ) @mcp.resource( uri="about://calculator", name="about_calculator", tags=["about", "calculator"], enabled=True ) async def about(ctx: Context) -> dict: """ Privides information about this calculator MCP. returns: str: Information about this calculator MCP. """ await ctx.debug("about_calculator resource called.") print("about://calculator resource called.") return { "version": "1.0.0", "name": "Simple Calculator Stdio", "description": "A simple calculator MCP that performs basic arithmetic operations.", "tools": ["addition", "subtract", "multiply", "divide", "reminder"] } @mcp.tool() def addition(first_number: float, second_number: float, ctx: Context) -> float: """ Add two numbers. args: first_number (float): The first number. second_number (float): The second number. returns: float: The sum of the two numbers. """ ctx.debug("addition::tool called.") print("addition::tool called.") sum = first_number + second_number ctx.info(f"Calculated sum: {sum}") return sum @mcp.tool( name="subtract", tags=["math", "arithmetic", "subtraction"], enabled=True ) def subtract(first_number: float, second_number: float, ctx: Context) -> float: """ Subtract two numbers. args: first_number (float): The first number. second_number (float): The second number. returns: float: The difference of the two numbers. """ ctx.debug("caculator::subtract::tool called.") print("caculator::subtract::tool called.") diff = first_number - second_number ctx.info(f"Calculated difference: {diff}") return diff @mcp.tool( name="multiply", tags=["math", "arithmetic", "multiplication"], enabled=True ) def multiply(first_number: float, second_number: float, ctx: Context) -> float: """ Multiply two numbers. args: first_number (float): The first number. second_number (float): The second number. returns: float: The product of the two numbers. """ ctx.debug("caculator::multiply::tool called.") print("caculator::multiply::tool called.") product = first_number * second_number ctx.info(f"Calculated product: {product}") return product @mcp.tool( name="divide", tags=["math", "arithmetic", "division"], enabled=True ) def divide(dividend: float, divisor: float, ctx: Context) -> float: """ Multiply two numbers. args: dividend (float): The first number. divisor (float): The second number. returns: float: The quotient of the two numbers. """ ctx.debug("caculator::divide::tool called.") print("caculator::divide::tool called.") if divisor == 0: raise ValueError("Cannot divide by zero(divisor).") quotient = dividend / divisor ctx.info(f"Calculated quotient: {quotient}") return quotient @mcp.tool( name="reminder", tags=["math", "arithmetic", "reminder"], enabled=True ) def reminder(dividend: float, divisor: float, ctx: Context) -> float: """ Divide two numbers & get the reminder. args: dividend (float): The first number. divisor (float): The second number. returns: float: The reminder of the two numbers. """ ctx.debug("caculator::reminder::tool called.") print("caculator::reminder::tool called.") if divisor == 0: raise ValueError("Cannot divide by zero(divisor).") reminder = dividend % divisor ctx.info(f"Calculated reminder: {reminder}") return reminder if __name__ == "__main__": mcp.run(transport="stdio") # stdio by default #mcp.run(transport="http", host="localhost", port=8009, show_banner=False)