3D Secure 2 SDK

For AI agents: the complete documentation index is at /llms.txt, and the full text of every page is at /llms-full.txt. Most pages are also available as Markdown by adding .md to the URL.

Policies

Connect

Additional Resources

Configuration

Notification URLs

Sample Method Notification Endpoint

Sample Challenge Notification Endpoint

Gather device data

Check version

Initiate authentication - exemptions

Mandatory & recommended fields

Optional fields

Authentication - Frictionless flow

Successful authentication response

Failed authentication response

Authentication - Challenge flow

Challenge response

Obtain authentication data

Authorization