---
title: API Reference
description: 'Endpoint reference for the Card Not Present Verification REST API: payment transactions, chargeback, credit card onboarding, and context signals.'
canonical: https://developer.unico.io/dual-api/developers/regional-solutions/card-not-present-verification/integration/apis/api-reference
locale: en
generated_by: markdown-export
---

- [Payment transactions](/developers/regional-solutions/card-not-present-verification/integration/apis/api-reference/payment-transactions): technical specifications of the Card Not Present Verification product REST APIs for managing payment transactions.
- [Chargeback](/developers/regional-solutions/card-not-present-verification/integration/apis/api-reference/chargeback): technical specifications of the Card Not Present Verification product REST APIs for managing chargeback transactions.
- [Credit card Onboarding](/developers/regional-solutions/card-not-present-verification/integration/apis/api-reference/credit-card-onboarding): technical specifications of the Card Not Present Verification product REST APIs for managing credit card onboarding transactions.
- [Context signals](/developers/regional-solutions/card-not-present-verification/integration/apis/api-reference/context-signals): technical specifications of the Card Not Present Verification product REST API for retrieving the fraud risk assessment of a completed credit transaction.