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

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 Smartpay Fuse Portal
  - Manage Permissions
    - Managing Permissions as an 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
- 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

On This Page

Target Origins

The target origin is defined by the scheme (protocol), hostname (domain), and port number (if used).

You must use the https:// protocol. Sub domains must also be included in the target origin.

Any valid top-level domains, such as .com, .co.uk, and .gov.br, are supported. Wildcards are not supported.

For example, if you are launching Unified Checkout on example.com, the target origin could be any of the following:

https://example.com

https://subdomain.example.com

https://example.com:8080

When you use Unified Checkout in an iframe, you must include the domain for the URL that loads the iframe and the iframe URL in the

targetOrigins

field.

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