app.py

import os
from fastapi import FastAPI, HTTPException
from fastapi_mcp import FastApiMCP
from pydantic import BaseModel
from typing import Optional

# Create a FastAPI instance
app = FastAPI()

# --- Keep this root endpoint for health checks and basic access ---
@app.get("/")
async def read_root():
    return {"message": "Server is running and healthy!"}

class ToolInput(BaseModel):
    text: str
    operation: str

class ToolOutput(BaseModel):
    result: str

@app.post("/tools/echo", operation_id="echo_tool")
async def echo_tool(input_data: ToolInput) -> ToolOutput:
    """
    A simple echo tool that returns the input text with a prefix
    """
    try:
        # Process the input
        result = f"Echo: {input_data.text}"
        return ToolOutput(result=result)
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))

# Initialize MCP with the tool endpoint
mcp = FastApiMCP(
    app,
    include_operations=["echo_tool"]
    )
mcp.mount()

if __name__ == "__main__":
    import uvicorn
    # Use the PORT environment variable provided by Hugging Face, default to 7860
    port = int(os.environ.get("PORT", "7860"))
    uvicorn.run(app, host="0.0.0.0", port=port)