How to Easily Develop Amazon Integration for Your eCommerce SaaS

What is Amazon Integration? ## Why Your eCommerce Software Needs Amazon Integration ## In-house Integration Development with Amazon ## Step-by-Step Amazon Integration Guide via API2Cart Amazon is one of the most popular marketplaces worldwide, with strong market presence in the United States, Canada, the United Kingdom, Germany, France, Italy, Spain, Japan, Australia, and India. Its global reach and massive seller ecosystem make it a critical sales channel for online businesses. As a result, eCommerce software vendors increasingly need to support Amazon integration to stay relevant and competitive. For SaaS products such as order management systems, shipping software, multi-channel solutions, and PIM platforms, Amazon is no longer optional—it is a growth driver. In this guide, we will analyze the benefits of Amazon integration, the key challenges involved, and the solution that helps simplify integration with multiple eCommerce platforms. Amazon integration is the process of connecting eCommerce software—such as OMS, WMS, shipping, or inventory management tools—with the Amazon marketplace. It enables software vendors to access, retrieve, update, and synchronize store data, including orders, products, customers, categories, inventory levels, and shipments. Through this integration, eCommerce SaaS can build functionality that supports Amazon sellers in their daily operations. For software vendors, Amazon integration becomes a foundation for delivering scalable, automation-driven features to their end users. Supporting Amazon integration allows eCommerce SaaS platforms to expand their value proposition and unlock new growth opportunities. By connecting with Amazon, software vendors position their solutions as essential tools for sellers operating across major marketplaces. 1. Access to a large and growing customer base Amazon hosts millions of active sellers globally, ranging from small businesses to enterprise brands. By offering Amazon integration, eCommerce SaaS immediately becomes relevant to this audience. This directly increases the potential client base and improves lead acquisition for software vendors targeting sellers who rely on Amazon as a primary or secondary sales channel. Amazon is highly popular in North America, Western Europe, and Asia-Pacific regions, including the US, Germany, the UK, Japan, and India. Supporting Amazon integration allows eCommerce SaaS vendors to enter these markets without building region-specific solutions from scratch. As a result, SaaS companies can expand their geographical footprint and grow market share faster. 3. Increase revenue and profits Each additional supported platform directly impacts revenue potential. By adding Amazon integration, eCommerce software vendors can attract more clients, upsell advanced features, and justify higher pricing tiers. The broader the platform coverage, the higher the lifetime value of each customer and the stronger the overall revenue stream. 4.Competitive advantage Every new supported marketplace strengthens your product positioning and puts your SaaS ahead of competitors with limited integration capabilities. Despite these benefits, Amazon integration also introduces several technical and operational challenges. You have two options of developing an integration with Amazon: in-house or using an integration solution. The first approach allows you to fully control the integration. However, it comes with a few challenges: Developing a native Amazon integration can take several months, especially when handling authentication, data mapping, error handling, and synchronization logic. Engineering teams must invest significant time to understand Amazon’s APIs, workflows, and edge cases. This slows down time-to-market and delays feature releases. Custom integration development can cost thousands of dollars per platform. These costs include development, testing, maintenance, and ongoing updates. When combined with the need to support additional eCommerce platforms, integration expenses can quickly escalate and impact overall profitability. Each eCommerce platform API, including Amazon API, has its own architecture, data structures, and business logic. Managing different formats, rate limits, and workflows increases technical complexity and introduces higher risk of errors. This makes scaling integrations across multiple platforms difficult. Amazon regularly updates its APIs, introducing new versions, deprecations, and policy changes. Engineering teams must continuously monitor updates and adjust integrations accordingly. This creates ongoing maintenance overhead and diverts resources from core product development. There is a more efficient way to simplify this process—using a ready-made integration solution such as API2Cart. API2Cart is a unified integration platform that enables eCommerce software vendors to easily develop and maintain Amazon integration without building it from scratch. It provides a single API interface that connects SaaS products with Amazon and dozens of other eCommerce platforms and marketplaces. Through API2Cart, software vendors can retrieve, add, update, and synchronize key store data such as orders, products, customers, shipments, and inventory. Step 1: Register API2Cart Account To start with, you need to create your API2Cart account. Remember that API2Cart provides a free 14-day trial. Step 2: Add Amazon store Next is connecting an Amazon seller account to your API2Cart account. The seller account that is planned to be connected to API2Cart must have an **active "Professional" selling plan **at Amazon. Detailed info on how to get required credentials to add an Amazon store to your API2Cart account is in this guide. Amazon restricts API access to personally identifiable information (PII), such as addresses in orders. If your app requires this data, you need to get access to it. To do this, you need to select the “Direct-to-Consumer Shipping” role and fill out the application form on Amazon Developer Profile. Step 3: Map Your SaaS Functionality to API2Cart API Methods At this stage, identify which API2Cart methods match the features your SaaS offers, such as order import, product sync, or shipment updates. For example, if you need to import products from Amazon, you should execute API2Cart product.list method. Here is part of an example of response structure of this method: If your features allow sellers to list products to Amazon, you need to use the product.add method. The request structure will look like this: By using API2Cart, development teams significantly reduce integration time and costs while avoiding platform-specific complexity. API2Cart handles API updates, data normalization, and platform-specific logic, allowing SaaS vendors to focus on building features rather than maintaining integrations. As a result, Amazon integration becomes faster to launch, easier to scale, and more reliable over time. For eCommerce software vendors aiming to support multiple platforms efficiently, API2Cart offers a proven and scalable integration approach. Want to know more about it? Check out the website or try a free trial! Templates let you quickly answer FAQs or store snippets for re-use. Are you sure you want to hide this comment? It will become hidden in your post, but will still be visible via the comment's permalink. 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