UseePay Open API
UseePay PortalMechant Dashboard
Product Docs
Product Docs
  • V2.0
  • V1.0
UseePay PortalMechant Dashboard
Product Docs
Product Docs
  • V2.0
  • V1.0
  1. Payment Product Overview
  • Integration
    • Welcome to the UseePay Demo Page
    • Payment Product Overview
      • Hosted Checkout Integration Guide
      • Embedded Checkout Integration Guide
      • Express Checkout Integration Guide
      • Server to Server Integration Guide
    • About Payment Methods
      • Card
      • Klarna
      • Naver pay
      • Kakao Pay
      • Toss Pay
      • Payco
      • Affirm
      • Blik
      • Trustly
      • Cashapp
      • Pay with Link
      • After Pay
      • ApplePay
        • Apple Pay
        • Apple Pay Web Integration (API Integration)
      • GooglePay
        • Google Pay
        • Google Pay Web Integration (API Integration)
    • Subscription
      • Get started with Subscription
    • Online payment
      • Get started with online payments
    • Payment Capabilities
      • Adaptive Price
      • Supported Payment Methods for Checkout
    • Checkout session
      • Checkout Session Guide
  • Developer
    • Introduction
    • Authentication
    • Errors
    • Error code
      • last_payment_error documentation
    • Best Integration
      • Quickly create a paymentIntent for a subscription
      • Auto-Charge Subscription Guide
    • Payment Intents
      • Payment Intent Overview
      • Quickly create a paymentIntent
      • Create a PaymentIntent
      • Retrieve a PaymentIntent
      • Update a PaymentIntent
      • Confirm a PaymentIntent
      • Cancel a PaymentIntent
      • Capture a PaymentIntent
      • List all payment intents
    • Customers
      • Create a customer
      • Retrieves a customer
      • Update a customer
      • List all customers
    • Subscriptions
      • Create a subscription
      • Retrieves a subscription
      • Update a subscription
      • List all subscriptions
      • Cancel a subscription
    • Invoices
      • Create a invoice
      • Retrieves a invoice
      • List all invoices
      • Pay a invoice
    • Payment Methods
      • Retieve Payment Method Session
    • Mandates
      • Create a mandate
      • Retrieves a mandate
      • List all mandates
    • Refunds
      • Create a refund
      • Retrieves a refund
      • List all refunds
    • Webhooks
      • Webhook Integration Guide(version 2026-04)
      • Integration details
        • Supported Webhook Events
        • Webhook Activation/Signature Verification Steps
        • Webhook events for example
        • Dispute Webhook Integration Document
        • Difference between version 2026-04 and 2026-10-10
      • archive
        • 2024-10-10
          • Webhook Integration Guide(version 2024-10-10)
      • Create a webhook
      • Retrieves a webhook
      • Update a webhook
      • List all webhooks
    • Embedded Checkout
      • Payment Element
      • Payment Element (Deferred Intent)
      • Express Checkout Element
      • Checkout Session Element
    • About Testing
      • Test Cards
      • ApplePay&GooglePay
    • Payment Method Configuration
      • Retieve Payment Method Configuration
    • Checkout Session
      • Create Checkout Session
      • Retrieve Checkout Session
    • Trackers
      • upload trackers
      • Retrieve a tracker
    • Capture
      • Capture Overview
      • List captures by intent id
    • Schemas
      • CheckoutSessionCreateRequest
      • PaymentMethod
      • CreatePaymentIntentRequest
      • LineItem
      • Customer
      • Address
      • ProductData
      • Shipping
      • SubscriptionData
      • Error
      • DiscountPeriodConfig
      • DeviceData
      • CheckoutSessionResponse
      • ErrorResponse
      • Order
      • Product
      • PaymentMethodOptions
      • RiskControlOptions
      • Mandate
      • PaymentIntent
      • Billing
      • Card
      • AliPay
      • Wallet
      • Klarna
      • WechatPay
      • Refund
      • Subscription
      • Recurring
      • PriceData
      • SubscriptionItem
      • Invoice
      • NextAction
      • Webhook
      • CollectableOptions
      • PaymentLink
      • last_payment_error
      • discount_period_config
      • Capture
  • Reconciliation
    • SFTP Access for Reconciliation
  • Message
    • Messaging Element
  • FAQ
    • Unable to receive Webhook notifications
  1. Payment Product Overview

Embedded Checkout Integration Guide

Embed UseePay's payment form directly into your page — customers complete payment without any redirect.
183012f6-562c-499c-93c3-1f2597a00717.png

Integration Options#

Payment ElementCheckout Session Element
Based onPaymentIntentCheckoutSession
One-time payment✅✅
Subscription✅✅
Auth + Capture✅✅

Option 1 — Payment Element#

https://docs-v2.useepay.com/8148431m0

Option 2 — Checkout Session Element#

https://docs-v2.useepay.com/8036907m0

Go-Live Checklist#

Obtain API keys from the Merchant Dashboard
Create PaymentIntent or CheckoutSession server-side only
Return clientSecret to the frontend via your own API
Load UseePay JS SDK and mount the payment element
Call confirmPayment() or actions.confirm() on form submit
Set up Webhook endpoint and verify payment result server-side
Test with test cards before going live
Modified at 2026-04-09 06:01:51
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Hosted Checkout Integration Guide
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Express Checkout Integration Guide
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