⚡ Live Sandbox: AI Dev Tool: FastAPI Pydantic v2 (l8q2)

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```python
# AI Dev Tool: Cloudflare Worker Hono API Template with FastAPI and Pydantic v2
# Description: A production-ready starter boilerplate for building micro-SaaS applications
# using Cloudflare Workers, Hono, FastAPI, and Pydantic v2.

import os
import json
from fastapi import FastAPI, HTTPException
from pydantic import BaseModel
from typing import Optional
from hono import Hono

# Initialize the FastAPI application
app = FastAPI()

# Initialize the Hono client
hono = Hono(api_key=os.environ.get("HONO_API_KEY"))

# Define a Pydantic model for the API request body
class RequestBody(BaseModel):
    """Request body model"""
    name: str
    email: str
    message: str

# Define a Pydantic model for the API response body
class ResponseBody(BaseModel):
    """Response body model"""
    success: bool
    message: str

# Define a route for handling API requests
@app.post("/api/submit", response_model=ResponseBody)
async def submit(request_body: RequestBody):
    """
    Handle API requests and send data to Hono.

Args:
    - request_body (

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