# 3D Secure

Building with an AI agent? Start at https://docs.payme.io/agents.md

Authenticate cards with 3D Secure 2, either as part of a PayMe sale or as a separate step with the standalone service when another gateway charges the card.

For how 3D Secure works across every integration, see [How 3D Secure works on PayMe](/accepting-payments/3d-secure/how-3d-secure-works).

## In this group

- [Generate a Sale with 3D Secure](/payments/generate-a-sale-with-3d-secure): 3D Secure on hosted-payment-page sales: when PayMe applies it (foreign cards, 3 or more installments, amounts from the account's threshold) and how to force it on or off per sale with services.
- [Standalone 3D Secure service](/payments/standalone-3d-secure-service): Run 3D Secure 2 authentication as a separate step, without charging the card: the flow from browser data to the resolved 3DS values.