AI Dev Tool: How AI text watermarking

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Preview Code

```python
# AI Dev Tool: AI-Powered Text Watermarking Micro-SaaS
# ================================================
# This production-ready developer code asset provides a FastAPI Pydantic v2 Micro-SaaS
# template for AI text watermarking, leveraging the AGENTS.md AI-Native SaaS Template.

from fastapi import FastAPI, HTTPException
from pydantic import BaseModel
from typing import Optional
import hashlib
import hmac
import json

# Define the FastAPI application
app = FastAPI(
    title="AI-Powered Text Watermarking Micro-SaaS",
    description="A production-ready developer code asset for AI text watermarking",
    version="1.0.0",
)

# Define the request body model for text watermarking
class TextWatermarkRequest(BaseModel):
    text: str
    watermark: str
    secret_key: str
# ... full runnable version includes tests & documentation