# Page Not Found

The URL `authentication` does not exist.

You might be looking for one of these pages:
- [ACH Transaction](https://docs.xplorpay.com/api-reference/api/payments/ach/ach-transaction.md)
- [Transactions](https://docs.xplorpay.com/api-reference/api/payments/cards/transactions.md)
- [ACH Transactions](https://docs.xplorpay.com/api-reference/api/payments/ach/ach-transaction/ach-transactions.md)
- [Application](https://docs.xplorpay.com/api-reference/api/merchant-onboarding/onboard-merchant/onboarding-management/application.md)
- [Transactions](https://docs.xplorpay.com/api-reference/api/payments/cards/transactions/transactions.md)

## How to find the correct page

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

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/api-reference/api/payments/ach/ach-transaction.md`)
- Use `Accept: text/markdown` header for content negotiation