> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.coinflow.cash/guides/checkout/payment-security-risk-management/checkout-security/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.coinflow.cash/_mcp/server.

# Checkout Security

## Docs

- [Wallet-Signed Authentication (Advanced)](https://docs.coinflow.cash/guides/checkout/payment-security-risk-management/checkout-security/strong-authentication.md): Require customers who connect with a Solana or EVM wallet to sign a message before viewing saved cards and bank accounts.
- [Tokenize Checkout Parameters](https://docs.coinflow.cash/guides/checkout/payment-security-risk-management/checkout-security/tokenize-checkout-parameters.md): This guide explains how to securely tokenize your checkout parameters with a JWT to prevent tampering and protect your users during payment.
- [Domain Whitelisting for Coinflow Checkout](https://docs.coinflow.cash/guides/checkout/payment-security-risk-management/checkout-security/whitelist-ur-ls.md): This guide explains how to whitelist your domain to ensure Checkout only loads on trusted sites, protecting against phishing and iframe injection attacks.