Top 7 Best eCommerce APIs and Integrations

Nataliia Kovalchuk
4 min readNov 1, 2022

Due to intense competition, many businesses are attempting to adopt new business models and keep up with their rivals. Therefore, innovation and constant adaptation are essential to succeed in a constantly changing sector.

SaaS software providers must integrate with eCommerce platforms’ APIs to provide vital services to online store owners. They include warehouse management, shipping label creation, order fulfillment, inventory management, and more. Support for numerous integrations can also benefit software vendors in a number of ways.

In the following section, we’ll look at some of the essential eCommerce APIs you should know about and that are having a significant impact on the industry.

The Meaning of eCommerce API

An eCommerce API is a set of standard protocols and tools that allow developers to create applications that interact with eCommerce platforms. These APIs can be used to customize and enhance eCommerce websites, empower online retailers, and streamline online shopping processes. They typically include functions for querying product catalogs, creating orders and fulfilling them, tracking order status, accessing transaction information, and more. eCommerce APIs make it easier for developers to build custom tools that integrate seamlessly with existing eCommerce platforms.

eCommerce API integration is necessary for a range of software and services, including order management, shipping, warehouse management, and marketing automation software. Since these products need eCommerce integration to perform their core functions, they must have access to all the required eCommerce APIs.

What is the Best eCommerce API?

Finding the best eCommerce API for integration for your SaaS software can take time and effort due to the abundance of available options. The following seven APIs will make your search easier:

  • eBay API
  • Shopify API
  • Amazon API
  • WooCommerce API
  • Walmart API
  • Ecwid API
  • Etsy API

eBay API

eBay API is one of the most popular eCommerce APIs. eBay marketplace has over 159 million active users who are localized in more than 30 countries.

The eBay API provides software developers with access to a variety of eCommerce-related data, including product lists, order information, customer data, and more.

eBay provides both RESTful and traditional APIs. This eCommerce API uses HTML, JSON, XML, and plain text formats.

Shopify API

The Shopify API is the eCommerce API of choice for many software vendors due to a large number of Shopify clients.

Shopify has earned its reputation as one of the most user-friendly eCommerce platforms available. This is mainly due to its vast array of tools, including the storefront API and administrator API, etc. Shopify can handle a variety of HTTP requests, including POST, GET, PUT, and DELETE. In addition, it supports XML and JSON.

Shopify’s API is updated regularly. Any eCommerce B2B software provider who wants to work with Shopify store data should keep this in mind. They should monitor the current version to ensure compatibility.

Amazon API

Amazon, the world’s largest online retailer, is also on the list of the best eCommerce APIs. Amazon’s API offers developers access to the company’s data and functionality.

The Amazon API provides information about products, orders, and more. It also allows you to access product reviews, seller profiles, feedback, and other useful information. The API supports CSV files or XML for communication and requires a certain level of interaction with Amazon’s servers.

WooCommerce API

More than two million active users trust WooCommerce. This is because it provides a secure eCommerce platform that allows the creation of robust online stores.

WooCommerce REST API supports JSON and can easily be converted to XML. It supports four HTTP methods: GET, POST, PUT, and DELETE. However, there is another — HEAD. Used in conjunction with a request for data about a specific product or order, HEAD returns only the “headers” for such an item. These methods allow for managing the data about products, orders, inventory, customers, and addresses.

Walmart API

The Walmart eCommerce API is a REST-based API that developers can use to build integrations with this platform. It enables you to easily manage products, orders, inventory, pricing, and reports.

Walmart’s API can help your company increase profits and gain more customers. The API allows you to provide online merchants with the ability to manage products, stocks, prices, inventory, orders, and reports.

Ecwid API

Ecwid is a software platform that enables small and medium-sized businesses to create bold, easy-to-use online stores. It powers more than 900,000 websites around the world.

The Ecwid eCommerce API uses a straightforward RESTful architecture and the OAuth2 authentication method to allow external applications to access store data, customize the storefront, etc.

Etsy API

Etsy offers an online marketplace for handmade items and vintage accessories, including clothing, jewelry, bags, home accessories, furniture, and more.

The Etsy eCommerce API is simple and efficient. It offers a RESTful interface, which means that developers can read and write data using GET, POST, PUT, and DELETE methods.

eCommerce API Integration Solution

For a SaaS software vendor, it isn’t easy to succeed. However, integrating with the best eCommerce API can help your company attain new heights. Whether you already have a solid software business or are just getting started, these integrations will increase your profits.

Integrating any eCommerce API into your software product can be difficult. If you do not plan ahead and choose the proper development method, the integration will be flawed and could hamper your SaaS business’s growth.

API2Cart is a third-party integration solution that connects B2B software to over 40 different shopping platforms. By using its unified API, developers can integrate their software with a variety of shopping platforms and marketplaces.

The API2Cart API methods allow you to retrieve, update, and delete store data related to orders, products, customers, and so on.

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