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

JavaScript Example: Initializing the SDK

const client = await VAS.UnifiedCheckout(sessionJWT);

In this example,

sessionJWT

refers to the capture context JWT.

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