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

Step 4: Configure Unified Checkout

Proper configuration ensures that your checkout process aligns with your business needs and provides a smooth experience for your customers. You can configure the checkout process in the Smartpay Fuse Portal:

Select and configure the payment methods you support:

Log in to the Smartpay Fuse Portal and navigate to the Unified Checkout configuration section.

Select the payment methods you want to use:

Credit and debit cards. See Cards.

Digital wallets such as Apple Pay, Click to Pay, and Google Pay. See Digital Wallets.

IMPORTANT

You must configure the payment methods you want to use for each transacting MID.

For information about which payment methods are supported on Unified Checkout, see Payment Methods.

Configure the settings for each selected payment method.

For information about configuring Unified Checkout in the Smartpay Fuse Portal, see Configure the Unified Checkout Merchant Experience.

AFTER COMPLETING THE TASK

Proceed to Step 5: Test Your Unified Checkout Integration.

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