# CyberSource Payer Authentication (3D Secure) API

**Canonical:** https://apis.io/apis/cybersource/cybersource-payer-authentication-3d-secure-api/  
**Provider:** CyberSource — https://apis.io/providers/cybersource/  
**Base URL:** https://api.cybersource.com  
**Documentation:** https://developer.cybersource.com/docs/cybs/en-us/payer-authentication/developer/all/rest/payer-auth.html

CyberSource Payer Authentication (3D Secure) API is one of 84 APIs that [CyberSource](https://apis.io/providers/cybersource/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Payer Authentication, 3D Secure, Fraud Prevention, SCA, and Chargeback Liability. The published artifact set on APIs.io includes API documentation.

Implements 3D Secure 2.x authentication to reduce fraud liability and enable frictionless payment experiences. Checks enrollment, validates payer authentication responses, and integrates with issuer bank authentication flows. Helps merchants shift chargeback liability and satisfy Strong Customer Authentication (SCA) requirements in regulated markets.

## Machine-readable artifacts (1)

- **Documentation** — https://developer.cybersource.com/docs/cybs/en-us/payer-authentication/developer/all/rest/payer-auth.html

## Other CyberSource APIs (12)

- [CyberSource Token Management Service (TMS) API](https://apis.io/apis/cybersource/cybersource-token-management-service-tms-api/)
- [CyberSource Decision Manager API](https://apis.io/apis/cybersource/cybersource-decision-manager-api/)
- [CyberSource Recurring Billing API](https://apis.io/apis/cybersource/cybersource-recurring-billing-api/)
- [CyberSource Payouts API](https://apis.io/apis/cybersource/cybersource-payouts-api/)
- [CyberSource Flex Microform API](https://apis.io/apis/cybersource/cybersource-flex-microform-api/)
- [CyberSource Unified Checkout API](https://apis.io/apis/cybersource/cybersource-unified-checkout-api/)
- [CyberSource Reporting API](https://apis.io/apis/cybersource/cybersource-reporting-api/)
- [CyberSource Transaction Search API](https://apis.io/apis/cybersource/cybersource-transaction-search-api/)
- [CyberSource Webhooks API](https://apis.io/apis/cybersource/cybersource-webhooks-api/)
- [CyberSource Boarding API](https://apis.io/apis/cybersource/cybersource-boarding-api/)
- [CyberSource Invoicing API](https://apis.io/apis/cybersource/cybersource-invoicing-api/)
- [CyberSource BIN Lookup API](https://apis.io/apis/cybersource/cybersource-bin-lookup-api/)

## Tags

Payer Authentication, 3D Secure, Fraud Prevention, SCA, Chargeback Liability

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/cybersource/cybersource-payer-authentication-3d-secure-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/cybersource/.