AI-Powered Grammar Corrector API

A clean and production-ready Flask API that automatically fixes grammar issues in English text using a pretrained T5 model from HuggingFace.

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✅ Key Features

• 📦 Flask-based RESTful API
• 🤖 Uses vennify/t5-base-grammar-correction model
• 🛡 Input validation & error handling
• 🚦 Built-in rate limiting: 10 requests/minute
• ⚙️ JSON input/output structure
• 🔁 Automatic model download on first run
• 🧪 Tested with Postman — 100% working

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🚀 Endpoint

POST /correct

Example Request:

{
  "text": "he go to school every day"
}

Example Response:

{
  "corrected": "He goes to school every day."
}

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⛔ Rate Limiting

The API is rate-limited to 10 requests per minute per IP address.
Exceeding this limit will return:

{
  "error": "Rate limit exceeded. Please try again later."
}

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⚙️ Requirements

pip install -r requirements.txt

This includes:

• Flask
• Flask-CORS
• Flask-Limiter
• Transformers
• Torch
• Python-Dotenv

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🖥 How to Run

python "AI-Powered Grammar Corrector API.py"

Server will start at:

http://127.0.0.1:5000/correct

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🧪 Screenshots (From Postman)

• ✅ Successful correction (200 OK)
• ⚠️ Empty input → 400 error
• 🔁 Exceeded limit → 429 error
• 🖥 Console log with model loading and request logs

💡 You can see real examples on the Gumroad gallery.

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💼 Ready-to-Use Version

You can get a ZIP version with all files, setup instructions, .env.example, and more:

👉 Buy it on Gumroad

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📬 Need this functionality in another language or stack (e.g. Node.js, Go, etc)?

Contact the author: [email protected]
📬 Telegram: @talabovali
💡 Note: Pricing may vary depending on complexity and target stack.