# Page Not Found

The URL `payment-gateway/api-specification/pay` does not exist.

You might be looking for one of these pages:
- [Pay](https://docs.galaxypay.vn/upc/payment-gateway/api-specification/payment/pay.md)
- [PAYMENT](https://docs.galaxypay.vn/upc/payment-gateway/api-specification/payment.md)
- [API Specification](https://docs.galaxypay.vn/upc/payment-gateway/api-specification.md)
- [Fast pay](https://docs.galaxypay.vn/upc/payment-gateway/api-specification/payment/fast-pay.md)
- [MANAGEMENT](https://docs.galaxypay.vn/upc/payment-gateway/api-specification/management.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://docs.galaxypay.vn/upc/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://docs.galaxypay.vn/upc/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/upc/payment-gateway/api-specification/payment/pay.md`)
- Use `Accept: text/markdown` header for content negotiation