Getting Started

ExpressCheckout SDK offers a payment experience where the UI is managed by the merchant, while the underlying payment flow is handled by Juspay. Merchants need to integrate with the SDK through a combination of APIs and SDK calls. Here are the steps to begin your integration journey:

Step-by-Step Integration

Step 1: Backend Integration

Use Juspay’s secure server-side APIs to:

• Create and manage customers using the Get Customer and Create Customer APIs

• Create order using Create Orders 

• Handle Webhooks for real-time order status

• Check Order Status using the Order Status API

• Process Refunds via the Refund Order API

Step 2: Frontend Integration 

• Use Juspay’s SDK to Render the Checkout screen and power payment options in your custom UI.

• Display and manage payment options, including Cards, Wallets, Bank Transfer, and RTP (Real Time Transfer)

• Capture payment responses through callback mechanisms

• Handling of SDK lifecycle events

Step 3: Testing & Go-Live

1. Share UAT Build: Once integration is done, submit your UAT build to Juspay for QA validation.

2. Removal of Restricted Mode: After QA approval, Juspay will switch your account to Live Mode.

3. Go Live: Your integration is now live and ready for real users to complete their checkout.

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Monitor & Analyse Post Go-Live

After going live, deploy your app with production credentials and use the Juspay Dashboard & Analytics to:

• Track live transactions in real time

• Analyze success and failure rates across payment methods

• View logs and webhook events for troubleshooting and monitoring

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Refund Handling

Process refunds using:

• Juspay Dashboard: Issue refunds manually using Juspay’s Dashboard interface

• Refund Order API: Automate refunds using the Refund Order API

Webhook Support: Get real-time notifications on refund status and completion through webhook events.

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Additional Features

Mandate Support

Support recurring/subscription-based payments with:

• Mandate Registration: Used this API to set up standing instructions by selecting a preferred payment method

• Mandate Execution: After registering a mandate, use the Mandate Execution API to trigger recurring transactions without user input.

• Webhook events: Receive notifications for mandate creation, execution, failure, expiry and other status updates via webhooks

Additional Developer Resources

Explore additional documentation and resources, including:

Core Resources

The Core Resources section provides essential technical references required to build and manage your payment integration effectively. This includes:

• Gateway Reference ID: Helps map Juspay transaction IDs to gateway-specific references.

• Transaction Status: API and status lifecycle documentation to track payments.

• Webhooks: Details on all webhook types—Order, Transaction, Mandate, Refunds

• Error Codes: A comprehensive list of standard and gateway-specific error codes for debugging.