API Overview

Unified Checkout Developer Guide
- Recent Revisions to This Document

Introduction to Unified Checkout

Unified Checkout Quick Start
- Step 1: Enable Unified Checkout
- Step 2: Set Up the Server-Side Component
- Step 3: Set Up the Client-Side Component
- Step 4: Configure Unified Checkout
- Step 5: Test Your Unified Checkout Integration

Unified Checkout Flow

Payment Methods
- Cards
  - Pay with Token
- eCheck/ACH Service
  - Enrolling in eCheck/ACH Services
  - Pay with eCheck/ACH Service UI
- Digital Wallets
  - Apple Pay
    - Enrolling in Apple Pay
    - Preparing a Device for Testing Apple Pay on Unified Checkout
    - Apple Pay UI
  - Google Pay
    - Enrolling in Google Pay
    - Managing Google Pay Authentication Types
    - Google Pay UI
  - Click to Pay
    - Enabling Click to Pay
      - Set Up Customer Authentication for Visa Click to Pay
      - Click to Pay Customer Authentication
    - Click to Pay UI
    - Click to Pay UI Guidelines
    - Click to Pay UI Examples
  - Paze
    - Paze UI
- Alternative Payment Methods
  - Online Bank Transfers
    - Bancontact
    - DragonPay
    - Tink Pay By Bank
    - iDeal
    - MyBank
    - Multibanco
    - Przelewy24|P24
    - Verify Status for Online Bank Transfers
    - Verify Status for Online Bank Transfers (Tink Pay By Bank)
    - Handle Responses
  - Buy Now, Pay Later
    - Afterpay
    - Verify Status for Afterpay
    - Handle Responses
    - Captures
  - Post-Pay Reference Payments
    - Konbini
    - Verify Status for Post-Pay Reference
    - Handle Responses

Server-Side Set Up

Client-Side Set Up
- Loading the JavaScript Library
- Complete Integration Examples

Configuration
- Configure the Unified Checkout Merchant Experience
  - Enable Unified Checkout
  - Configure Payment Options
  - Customize the Unified Checkout Look and Feel
  - Look and Feel UI Examples
  - Configure Customer Data and Payment Flow
  - Capture Context Fields in the Business Center
  - Manage Permissions
    - Managing Permissions as a Direct Merchant
    - Managing Permissions as a Portfolio Administrator
- Process Payments with Unified Checkout
- Webhooks Support

Transient Tokens
- Transient Token Format
- Token Verification
- Dual-Branded Cards
- Authorizations with a Transient Token

Test Your Configuration
- Unified Checkout Test Cards
- Visa and Mastercard Click to Pay Test Cards
- Test Cards for Authentication by Click to Pay
- Echeck Test Values
- Test Authentication
- Handle Errors
- Reason Codes

Payment Details API

JavaScript API Reference

Appendix
- JSON Web Tokens
- Supported Countries for Digital Payments
- Supported Locales
- Update to Unified Checkout Version 1
  - Update Reason Codes
  - Version 1 Update Checklist
- Security Recommendations
- PCI Compliance

VISA Platform Connect: Specifications and Conditions for Resellers/Partners

On This Page

`Unified Checkout` Flow

To integrate Unified Checkout into your platform, you must follow several integration steps. This section gives a high-level overview of how to integrate and launch Unified Checkout on your webpage and process a transaction. You can find the detailed specifications of the APIs later in this document.

Information that is captured by Unified Checkout, including the billing and shipping address, can be retrieved using the payment details API.

The figure below shows the Unified Checkout payment flow using the sessions API to generate the capture context:

Diagram that shows the sequence and flow of a Unified Checkout payment. — Unified Checkout Payment Flow

For more information on the specific APIs referenced, see these topics:

Sessions API: This generates the capture context and determines what fields are displayed to the customer in the UI during checkout.

Payment Details API: This API can be used to retrieve personally identifiable information that is associated with a Unified Checkout transient token, such as the cardholder name and billing and shipping details, without retrieving payment credentials.

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