22 September, 2023

API wars – REST Vs SOAP. Which one is the best for mobile commerce app development?

APIs do the crucial job of creating seamless connectivity and establishing a communication channel between an eCommerce store and the mobile ecommerce app developed for it, be it a Magento mobile app or for any other ecommerce development platform. Choosing your API is going to be the deciding factor of your mobile app’s performance, security and functionality.

Here we have come up with a discussion of sorts which highlights the positives and limitations of both REST and SOAP API which might help in choosing the appropriate one to build your mobile ecommerce app.

Use of REST and SOAP API

Both these APIs do the job of creating a platform through which the app interacts with the server. These APIs connect with the server in the backend usually for push notifications, data storage, file storage, messaging queues, monitoring and configuration, and social integration.

In case of REST the server response format or the output format is JSON/XML which can be easily understood or followed. In case of SOAP, server response is in the form of WSDL, an advanced form of XML.

Modern day developers adopt a API-first approach in mobile commerce app development in which the application programming interface is built first.

This approach helps developers to build, manage and deploy the different platform-specific appearances of an app using just one API backend as a service (BaaS). Thus it will be easy from a developer’s point of view to cater to audiences on multiple devices.

Having discussed the utilities of APIs let’s plunge into the pros and cons of it.


Follows the open-web philosophy that opposes private and exclusive app solutionsDifficult to enforce authorization and security
Readable, easy to implement and maintainNot suitable for handling large amount of data
Output format – JSON, XMLLess secure compared to SOAP
Prevents multiple calls that contributing for better performanceIt is stateless
Protocol independent
Not coupled to HTTP (server)



Works on top of any protocolEats up bandwidth for repeated communications with server
Development method facilitates secured buildDifficult implementation method
Can be used for enterprises that require high securityUses only XML

Can both REST and SOAP be used to create an ecommerce mobile app?

Yes of course. These APIs can be used to perform different tasks within a mobile ecommerce app. For instance, REST API can be deployed for functions like browsing through the app, adding to cart, chat etc while SOAP can be used for those which involve top-of-the-line security like payment transactions (payment gateway) etc.

Having discussed the pros and cons of each API, let’s get into a sample code that would make things much clear about using each of these APIs to perform a particular function.

Soap Vs Rest

REST can be implemented locally, whereas SOAP needs the server’s authorization/permission for the same.

In this example of retrieving a user’s information, REST uses a single line of code.
The module (phonebook), action (User Detail) and ID (12345) are directly called locally whereas the same process is split into multiple client server interactions in case of SOAP

<?xml version=”1.0″?><soap:Envelope

In the above mentioned portion of code, the version of the xml used specified and the server permission is requested to establish the connection.

<soap:body pb=”http://www.acme.com/phonebook”&gt;

Here, the module name, module, action and ID are called separately

Separate entities/parameters and functions are used for specifying the module, action and ID which clearly suggests that authorization and the layers of security are far more complex with SOAP compared to REST API. This draws the distinguishing line between the two APIs and explains the time taken and the amount of server load increased when you use SOAP to create an ecommerce mobile app.

Content management systems like Joomla, WordPress, social media like Twitter, LinkedIn make use of REST while cloud-based CRM like Salesforce and payment gateways like PayPal are built using SOAP.

Limitations of REST and SOAP API

Cannot be used when client and server interactions are essentialCannot be easily understood and used by many developers
Cannot be used for transactions involving multiple callsWhen there are bandwidth limitations

REST and SOAP APIs have their own set of advantages and shortcomings depending upon the purpose, environment and requirement of your application.

If you are planning to adopt your API for multiple mobile device OS, REST is the best to go for. While you are going to build a mobile ecommerce app with high-profile security, SOAP is the best one to serve your purpose.



Alex Sam is a mobility, IoT & chat app specialist and I would like to spend most of my time in reading and analyzing the latest happenings in the technology and how they fit into our daily lives. I always endeavor to identify more ideas and concepts, and develop user-friendly apps through leveraging technology.


  1. Joanna Shaun Reply

    REST Vs SOAP api has been eating my brains since some days. Thanks for explaining it in minute detail. I know certain ecommerce companies use REST api for login authorization. Happy to know the differences between the two apis.

  2. Christine Hex Reply

    A fantastic post. Reading something with so much intellectual content after a long time. You have presented such technical info about REST Vs SOAP api in a lucid manner. Kudos.

  3. revlift Reply

    Now a days all the people are using mobile phone to share thier ideas and various purposes, so mobile apps are developed more important ;this article gives good ideas for developing iOS apps for mobile this is very usefull for me

  4. Mobtecnica Consultancy Reply

    Awesome. You pointed out the pros and cons of REST & SOAP, its limitations,coding etc. very clearly throughout this blog. This article helped me a lot in app development. Thankyou.

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