pip install flask-mcp-plus

from flask import Flask
from flask_mcp_plus import MCP

app = Flask(__name__)
mcp = MCP()
mcp.init_app(app, "my_mcp_server", __name__)


# Define a simple tool
@mcp.tool
def add(a: int, b: int) -> int:
    """Add two numbers together."""
    return a + b


# Define a resource
@mcp.resource("http://example.com/data.json")
def get_data():
    """Return some static data."""
    return {"message": "Hello, MCP!"}


# Define a prompt
@mcp.prompt
def greeting(name: str) -> str:
    """Create a personalized greeting."""
    return f"Hello, {name}!"


if __name__ == "__main__":
    app.run(debug=True)

{
  "mcpServers": {
    "my_mcp_server": {
      "autoApprove": [],
      "disabled": false,
      "timeout": 60,
      "type": "streamableHttp",
      "url": "http://127.0.0.1:5000/mcp"
    }
  }
}

from flask_mcp_plus import Text, Field
from typing import Annotated


@mcp.tool(
    name="calculate_sum",
    title="Calculate Sum",
    description="Add two floating point numbers",
    icons=[
        {
            "src": "https://example.com/calculator-icon.png",
            "mimeType": "image/png",
            "sizes": ["48x48"]
        }
    ]
)
def add_float(a: Annotated[float, Field(description="The first number")],
              b: Annotated[float, Field(description="The second number")]) -> Text:
    return Text(text=str(a + b))

@mcp.resource("file://data/config.json")
def get_config():
    """Return static configuration data."""
    return {"setting1": "value1", "setting2": "value2"}


# Dynamic resource with path parameters
@mcp.resource("file://data/users/{user_id}.json")
def get_user(user_id: str):
    """Return user data by ID."""
    return {"id": user_id, "name": f"User {user_id}"}

from flask_mcp_plus import Message, Text


@mcp.prompt
def daily_fact() -> Message:
    """Return a daily fact as a message."""
    return Message(
        content=Text(text="The capital of France is Paris.")
    )

@mcp.tool(
    output_schema={
        "type": "object",
        "properties": {
            "result": {"type": "string"},
            "success": {"type": "boolean"}
        },
        "required": ["result", "success"]
    }
)
def api_call():
    return {
        "result": "Operation completed successfully",
        "success": True
    }

from flask_mcp_plus import Image, Text


@mcp.tool
def multi_data():
    return [
        Image(data=base64_image_data),
        Text(text="Here's an image and some text")
    ]

cd src/example
python tools.py

mcp = MCP()
mcp.init_app(
    app,
    name="my-awesome-server",
    import_name=__name__,
    url_prefix="/mcp",  # Endpoint prefix for MCP routes
    version="1.0.0"
)

# Clone the repository
https://github.com/maocatooo/flask-mcp-plus
cd flask-mcp-plus

# Install dependencies
uv sync