Custom Website Payment Gateway
Custom Payment Gateway Integration
Businesses with custom websites, SaaS platforms, web applications, marketplaces, and software systems often need payment infrastructure that can be integrated directly into their own technology stack.
AI PAY helps businesses plan, configure, and integrate suitable payment solutions with custom-built applications using APIs, SDKs, plugins, hosted checkout, and other integration methods.
Whether your application is built with **Laravel, PHP, Node.js, React, Next.js, Python, or another technology**, AI PAY can help you connect your business application with suitable payment infrastructure.
Custom Payment Gateway Integration
A **custom payment gateway integration** allows businesses to connect payment infrastructure directly to their own website or application.
This can be useful for businesses that need more control over:
* Checkout experience
* Payment workflow
* Order processing
* Payment verification
* Transaction status
* Refunds
* Customer accounts
* Subscriptions
* Multi-currency payments
* International payments
* Marketplace payments
* SaaS billing
AI PAY can help assess your existing system and determine the appropriate payment integration approach.
Payment API Integration
For custom applications, payment APIs are commonly used to connect the application backend with payment infrastructure.
A typical payment API integration may include:
**Customer → Checkout → Payment API → Payment Provider → Payment Result → Webhook → Application → Order Fulfillment**
Depending on the payment provider, the integration may support functions such as:
* Create payment
* Payment session
* Payment request
* Payment confirmation
* Payment status
* Payment verification
* Webhook
* Refund
* Transaction lookup
* Recurring payment
* Subscription billing
The exact API functions and requirements depend on the selected payment provider.
Laravel Payment Gateway Integration
Laravel is widely used for custom web applications, ecommerce systems, SaaS platforms, and business applications.
AI PAY can help businesses integrate payment infrastructure with **Laravel applications** through available APIs, SDKs, plugins, or custom development.
Possible Laravel payment integration requirements include:
* Payment checkout
* Credit card payment
* PromptPay
* Payment status
* Webhook handling
* Transaction verification
* Refund processing
* Order synchronization
* Subscription payment
* Customer payment records
The integration can be designed around the existing Laravel application's database, order management, authentication, and business logic.
PHP Payment Gateway Integration
PHP remains widely used for custom websites and web applications.
For businesses operating a custom PHP application, AI PAY can help evaluate how payment infrastructure can be connected to the existing system.
A PHP payment integration may involve:
* REST API
* SDK
* Payment library
* Hosted checkout
* Custom checkout
* Webhook
* Server-to-server communication
The objective is to connect payment functionality without requiring the business to replace its existing application.
Payment Gateway Integration
Node.js is commonly used for modern web applications, APIs, SaaS platforms, and backend systems.
AI PAY can help businesses integrate payment services into **Node.js applications** using the payment provider's available API or SDK.
A typical Node.js payment workflow may include:
1. Customer creates an order
2. Node.js backend creates a payment request
3. Customer completes payment
4. Payment provider processes the transaction
5. Webhook is sent to the application
6. Node.js verifies the payment status
7. Order status is updated
This approach can be used for ecommerce, SaaS, marketplaces, subscriptions, and other custom applications.
React Payment Gateway Integration
React can be used to build custom checkout interfaces and web applications.
A **React payment gateway integration** may connect a custom frontend to a backend payment API.
For example:
**React Frontend → Application Backend → Payment API → Payment Provider**
Payment credentials and sensitive server-side operations should be handled according to the payment provider's technical requirements rather than exposing private credentials in the frontend.
AI PAY can help businesses determine the appropriate architecture for connecting React-based applications to payment infrastructure.
Payment Gateway Integration
Next can be used for both frontend and server-side application functionality.
This makes it suitable for businesses building:
* Ecommerce websites
* SaaS applications
* AI applications
* Subscription platforms
* Business portals
* Marketplaces
* Custom commerce systems
AI PAY can help businesses evaluate payment integration using APIs, server-side functions, external payment APIs, webhooks, and custom checkout workflows.
The exact implementation depends on the selected payment provider and the architecture of the application.
# Python Payment Gateway Integration
Python is widely used for web applications, SaaS platforms, automation systems, AI applications, and custom backend services.
A **Python payment gateway integration** can connect a Python application to payment infrastructure through available APIs or SDKs.
Potential requirements include:
* Payment creation
* Checkout
* Payment verification
* Webhook processing
* Refunds
* Transaction records
* Subscription billing
* Order synchronization
Python-based AI applications can also combine payment functionality with AI-powered customer interfaces, business automation, or commerce workflows.
Custom API Payment Integration
Some businesses already have their own internal API architecture.
In this situation, payment infrastructure can be integrated into the existing API layer rather than directly into the frontend.
For example:
**Website / Mobile App / AI Interface**
↓
**Custom Business API**
↓
**Payment Integration Layer**
↓
**Payment Provider**
↓
**Webhook / Payment Status**
↓
**Custom Business System**
This architecture can help separate payment processing from the presentation layer and allow multiple customer-facing applications to use the same payment infrastructure.
SaaS Payment Integration
SaaS businesses often have payment requirements that differ from traditional ecommerce.
A SaaS platform may need:
* Subscription payments
* Monthly billing
* Annual billing
* Recurring payments
* Free trials
* Plan upgrades
* Plan downgrades
* Payment failure handling
* Invoice generation
* Refunds
* Customer billing records
* Multiple currencies
AI PAY can help SaaS businesses evaluate payment providers and design payment workflows around their subscription and billing architecture.
SaaS Subscription Payment
A typical SaaS payment workflow may look like:
**Customer → Select Plan → Checkout → Payment → Subscription Created → Recurring Billing → Payment Status → Account Access**
The payment system needs to communicate with the SaaS application so that customer access and subscription status can be updated appropriately.
Web Application Payment Integration
Custom web applications may have payment requirements that do not fit standard ecommerce platforms.
Examples include:
* Booking systems
* Service platforms
* Education platforms
* Membership systems
* Digital services
* Online marketplaces
* B2B platforms
* AI applications
* Business management systems
AI PAY can help businesses identify suitable payment infrastructure and integration methods based on the application's workflow.
Marketplace Payment Integration
Marketplaces can have more complex payment requirements because multiple parties may be involved in a transaction.
A marketplace may need to manage:
* Buyers
* Sellers
* Orders
* Commissions
* Payment status
* Refunds
* Seller settlements
* Transaction records
* Multiple currencies
* International transactions
Payment architecture for marketplaces depends heavily on the capabilities and regulatory requirements of the selected payment provider.
AI PAY can help businesses assess the payment requirements before implementing a marketplace payment system.
Marketplace Payment Flow
A typical marketplace architecture may involve:
**Buyer**
↓
**Marketplace Checkout**
↓
**Payment Provider**
↓
**Payment Confirmation**
↓
**Marketplace Order System**
↓
**Seller / Merchant Settlement**
The exact flow depends on the payment provider's marketplace and payout capabilities.
Custom Credit Card Payment Integration
Businesses with custom applications may want to accept credit and debit card payments without replacing their existing website or application.
Depending on provider capabilities, integration may use:
* Hosted payment pages
* Payment forms
* Tokenization
* Payment APIs
* SDKs
* Secure checkout components
Card payment implementation should follow the payment provider's security and technical requirements.
Custom PromptPay Integration
Thai businesses may also need to accept PromptPay through a custom website or application.
A custom PromptPay integration may involve:
* Generating a payment request
* Displaying payment information
* QR payment
* Payment status
* Webhook notification
* Payment verification
* Order status synchronization
The exact functionality depends on the payment provider and its API capabilities.
International Payment Integration
Custom applications serving international customers may require multiple payment methods and currencies.
AI PAY can help businesses evaluate requirements such as:
* International credit cards
* PayPal
* Local payment methods
* Digital wallets
* Multi-currency checkout
* Cross-border payments
* International settlement
Payment availability depends on the provider, merchant eligibility, business model, and target country.
Custom Payment Gateway Integration Process
1. Review Your Application
We first understand your technology, application architecture, business model, and payment requirements.
2. Identify Payment Requirements
We review requirements such as:
* Payment methods
* Countries
* Currencies
* Average transaction value
* Recurring payments
* Refunds
* Settlement
* Marketplace requirements
* Technical requirements
3. Select a Payment Integration Method
Depending on your system, the integration may use:
* API
* SDK
* Plugin
* Hosted checkout
* Custom checkout
* Payment link
* Webhook
4. Configure the Payment System
Payment credentials, API settings, webhook endpoints, callback URLs, and other required configuration can be prepared according to the provider's documentation.
5. Develop the Integration
The payment workflow is connected to the existing application and business logic.
6. Test the Payment Flow
Testing can include:
* Successful payment
* Failed payment
* Cancelled payment
* Payment status
* Webhook
* Refund
* Order synchronization
* Subscription billing
7. Production Launch
After testing and provider requirements are completed, the payment integration can be moved to the production environment.
Why Use AI PAY for Custom Payment Integration?
Custom payment integration is not simply about adding a payment button.
The payment system needs to work with the application's:
**Business Logic + Checkout + API + Database + Orders + Customer Accounts + Payment Provider**
AI PAY helps businesses understand the requirements and coordinate the payment setup and integration process around their existing technology.
Whether you operate a Laravel website, Node.js application, Next.js platform, Python application, SaaS product, marketplace, or completely custom system, we can help you evaluate the payment infrastructure required for your business.
Custom Payment Gateway Integration for Your Business
Already have a custom website or application?
AI PAY can help you understand:
* Which payment methods you may need
* Which payment providers may fit your business
* Whether API, SDK, plugin, or hosted checkout is appropriate
* How payment should connect to your application
* How to handle payment status and webhooks
* How to support refunds and order synchronization
* How to prepare for international payments
* How to move from testing to production
**Talk to a Payment Expert**
Tell us about your application, technology stack, business model, target customers, and payment requirements.
AI PAY can help you plan the payment infrastructure and integration approach for your custom application.
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* International Payment Solutions
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