A Guide to Integrating Payment Gateways in Your Application

Posted By : Mohika
Jul 14, 2023

What is a payment gateway?


A payment gateway is a piece of software or a service that, much as a POS system does for a physical store, processes credit cards and other forms of payment for e-commerce firms and retailers. To safeguard credit cards and other payment methods and assure the success of the transaction between the merchant and the client, it must be able to encrypt payment information. While the idea may be straightforward, not all of the procedures are. For instance, the transaction information must be able to be sent to the proper source for approval and then returned to the retailer via the payment processing software. 


Why You Need a Payment Gateway:


A payment gateway is necessary if you currently have or plan to have a website that takes online payments. The fact that payment gateways now handle all online credit card transactions is one explanation for this. There are no workable substitutes. For your clients' orders to be authorized and for you to get paid, you must have one. If you intend to take payments via a mobile device, you will also require one.


How to Select a Secure Payment Gateway :


There are several factors to take into mind when picking a payment gateway, but none are more important than security. 
In a study by Experian, as 55% of customers rated security as the most crucial element of their online experience, and 49% wanted companies to make their online security more obvious. 
Ask the following questions to be sure you're dealing with a safe payment gateway.

  1. Cost: Based on the number and value of your transactions, consider the set-up, monthly, and transaction costs.
  2. Card kinds: Verify that the gateway accepts the popular card types that your consumers use.
  3. Check the amount of time payments are kept before being sent to your account.
  4. Select a gateway with support for many currencies so that you may accept payments in various currencies.
  5. Recurring billing: If necessary, choose a gateway that can effectively manage recurring payments.
  6. Choose between a hosted gateway (which redirects users) and a non-hosted gateway (which accepts payments directly on your website).
  7. Security: Give high-security requirements like PCI DSS compliance priority when choosing gateways.
  8. Check to see if the gateway accepts payments made via mobile devices.


 How to integrate a payment gateway into an application.


Step 1: Pick a provider of a payment gateway


Choose a payment gateway provider that meets your unique needs as the first step. Think about things like transaction costs, accepted payment methods, security features, and documentation that is developer-friendly. PayPal, Stripe, Braintree, and Authorize.Net are a few well-known payment gateway companies. Make an informed choice by doing your homework and comparing their services.


Step 2: Create an account and obtain API credentials 


Create an account on the payment gateway provider's website once you've made your decision. Typically, this procedure includes giving pertinent company information, proving your identification, and accepting their terms and conditions. You will obtain API credentials, including a special API key and other relevant identifiers, after successfully creating an account. The communication between your application and the payment gateway will be authenticated and authorized using these credentials.


Step 3: Understand Payment Flows and Transaction Processes


Understand the various payment flows and transaction procedures provided by the provider before integrating the payment gateway into your application. Learn about ideas such as one-time payments, recurring payments, subscriptions, and refund management. This information will assist you in implementing the proper logic and ensuring a positive user experience for your application's users.


Step 4: Select an integration strategy


To meet varied technological needs, payment gateway providers often provide a variety of integration techniques. The most popular techniques are:

a. API Integration: This entails directly connecting your application with the payment gateway's API. Although it offers more flexibility and control, it necessitates more development work. You can follow the instructions for the required API calls, request parameters, and response processing in the provider's documentation.

b. Hosted Payment Page: Using this technique, you send consumers to a safe payment page that is hosted by the payment gateway company. After handling the payment transaction, the supplier sends the user back to your application. Although it involves less time to design, this approach could only provide restricted customization choices.


Step 5: Put Payment Gateway Integration into Practise


It's time to integrate the payment gateway with your application now that you have decided on the integration strategy. Depending on your programming language, framework, and the supplier of your preferred payment gateway, different implementation procedures will apply. However, the general stages are mentioned below:

a. Install required libraries or SDKs: Install and set up any necessary software development kits (SDKs) or libraries offered by the payment gateway.

b. Compile and verify user payment data: Create a secure user interface for your application to collect the required payment information. To avoid any potential security flaws, validate and clean up the user input.

c. Interact with the API for the payment gateway: Make the required API calls to start and complete any API integration you have chosen.

d. Manage replies and update your application: Manage responses from the payment gateway API, including alerts of success or failure. Adapt your application's logic appropriately, giving the user the proper response.

f. Put security precautions in place: Adhere to security best practices, such as encrypting sensitive information, employing secure communication protocols (such as HTTPS), and putting safeguards in place to thwart fraud and unauthorized access.


Step 6: Test and debug 


Test your payment gateway integration thoroughly to make sure everything works as it should. To ensure that your implementation is accurate, simulate several payment situations, including both successful and unsuccessful transactions. When problems or mistakes occur during testing, troubleshoot them and make the required corrections until everything functions properly.


Step 7: Go Live and Monitor


Take your application live when you have successfully integrated and tested the payment gateway. During the early phase, keep a tight eye on the transactions and user comments to spot any possible problems. Update your integration often to reflect any alterations or improvements provided by the vendor of the payment gateway.




A payment gateway's integration with an application is a crucial step in allowing frictionless online transactions. You may offer a safe and user-friendly payment experience within your application by carefully choosing a payment gateway provider, comprehending payment flows, and putting into practice the integration approach best suited to your needs. To guarantee a seamless payment procedure for your consumers, keep in mind to adhere to the provider's guidelines, prioritize security, and rigorously test your implementation.

Leave a


Name is required

Invalid Name

Comment is required

Recaptcha is required.


December 7, 2023 at 05:39 pm

Your comment is awaiting moderation.

No Comments Yet.

    More From Oodles

    By using this site, you allow our use of cookies. For more information on the cookies we use and how to delete or block them, please read our cookie notice.

    Chat with Us Chat with Us
    We would love to hear from you!

    Oodles | Blockchain Development Company

    Name is required

    Please enter a valid Name

    Please enter a valid Phone Number

    Please remove URL from text