Forem: Khrystyna

How to Easily Develop Amazon Integration for Your eCommerce SaaS

Khrystyna — Thu, 18 Dec 2025 12:44:55 +0000

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.

What is Amazon Integration?

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.

Why Your eCommerce Software Needs Amazon Integration

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.

2. Enter new markets

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.

In-house Integration Development with Amazon

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:

Time-consuming

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.

Expensive

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.

Complicated

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.

Frequent API changes

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.

Step-by-Step Amazon Integration Guide via 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.

Important details:

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:

{
  "return_code": 0,
  "return_message": "string",
  "pagination": {
    "previous": "string",
    "next": "string",
    "additional_fields": {},
    "custom_fields": {}
  },
  "result": {
    "products_count": 0,
    "product": [
      {
        "id": "string",
        "type": "string",
        "u_model": "string",
        "u_sku": "string",
        "name": "string",
        "description": "string",
        "short_description": "string",
        "price": 0,
        "advanced_price": [
          {
            "id": "string",
            "value": 0,
            "avail": true,
            "group_id": "string",
            "quantity_from": 0,
            "start_time": {
              "value": "string",
              "format": "string",
              "additional_fields": {},
              "custom_fields": {}
            },
            "expire_time": {
              "value": "string",
              "format": "string",
              "additional_fields": {},
              "custom_fields": {}
            },
            "additional_fields": {},
            "custom_fields": {}

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:

{
  "price": 99.9,
  "sku": "bag_01",
  "category_id": "6",
  "product_type": "BICYCLE",
  "store_id": "1",
  "quantity": 0,
  "upc": "9770317847001",
  "ean": "5901234123457",
  "gtin": "12345678912345",
  "asin": "97703178470",
  "marketplace_item_properties": "{\"color\":[\"Silver\"],\"manufacturer\":\"Philips\",\"features\":[\"3 way\"],\"countPerPack\":1,\"watts\":{\"unit\":\"W\",\"measure\":40}}"
}

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!

Live Shipping Rates for eCommerce SaaS: A Step-by-Step Guide

Khrystyna — Thu, 30 Oct 2025 12:04:32 +0000

Does your SaaS provide a Live Shipping Rate feature? If not, you must definitely implement it, as it can be your competitive advantage. Offering real-time shipping rates can significantly improve the customer experience, increase conversions, and streamline logistics. But implementing this feature for your SaaS solution can be a challenge.

In this article, you will learn why Live Shipping Rates functionality is important for store owners and their end customers, and how API2Cart can help you develop this feature effortlessly.

What are Live Shipping Rates?

Live Shipping Rates are real-time carrier-calculated rates based on factors such as weight, destination, and shipping method. Unlike flat-rate shipping, where customers pay the same amount regardless of distance or package size, Live Shipping Rates calculate the exact cost for each order, providing accurate shipping fees during the checkout process.

By designing a Live Shipping Rates feature for your SaaS, you can provide your clients (eCommerce store owners) with the ability to show their customers accurate shipping costs in real time, leading to fewer abandoned carts and better customer satisfaction.

image source

Why Live Shipping Rates Matter for Your SaaS

Live Shipping Rates feature brings several significant benefits for end customers:

Improved Accuracy: Providing real-time shipping rates ensures that customers always know the exact shipping costs before they complete their purchase, eliminating surprises and reducing cart abandonment.
Enhanced Customer Experience: Offering accurate shipping costs enhances trust and transparency, creating a better shopping experience. Customers are more likely to complete a purchase when they know exactly what to expect for shipping.
Increased Conversions: With Live Shipping Rates, your clients can offer multiple shipping options (e.g., expedited shipping, standard shipping), giving customers the flexibility to choose based on their needs and budget. This can increase conversion rates by offering tailored solutions to different customer preferences.
Better Logistics Management: By automating the shipping cost calculation, SaaS can help eCommerce store owners better manage their shipping processes, improving efficiency and reducing manual errors in shipping calculations.
Global Expansion: For SaaS providers supporting international clients, offering Live Shipping Rates makes it easier to scale. Real-time shipping information can be obtained from multiple carriers around the world, supporting global shipping operations.

How API2Cart Helps to Implement Live Shipping Rates Feature

API2Cart is a solution for eCommerce SaaS such as shipping software, inventory management systems, multi-channel software, etc to integrate with multiple eCommerce platforms at once.

Beside standard API methods for working with orders, products, customers and categories, it provides a list of endpoints to create, get a list and delete live shipping rate services.

Such methods are supported now for Magento, Magento 2 API, OpenCart, PrestaShop, PrestaShop Api, Shopify, Shopline, WooCommerce, WooCommerce API and Zoey.

API Methods for Working with Live Shipping Rates

Let’s explore in detail how to start working with live shipping rates using API2Cart.

First of all, you need to create a new shipping service on the online store using basket.live_shipping_service.create.json method.
You need to specify the service name and callback URL, that will return API2Cart the shipping rates. Every time an e-store client will be on the checkout page of the website, we will send you all the necessary information. Your system will analyze the shipping costs and send us the final price.
After that, API2Cart will send this info to the e-store.

Depending on the platform, the structure of the request and the expected response will be slightly different, as some platforms may support more fields.

Here is an example of response structure of basket.live_shipping_service.list.json method for Shopify:
{ "return_code": 0, "return_message": "string", "result": { "live_shipping_services": [ { "id": "string", "name": "string", "callback": "string", "callback_err_cnt": 0, "enabled_on_store": true, "additional_fields": {}, "custom_fields": {} } ] } }
API2Cart provides detailed API Documentation. There you can find examples of requests and responses of all our API methods.

Start your free 14-day trial with API2Cart today and begin implementing the Live Shipping Rates feature for SaaS solution with ease!

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Khrystyna — Mon, 29 Sep 2025 07:59:45 +0000

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13 Popular eCommerce APIs Your SaaS Should Integrate With (Dev Ratings Included)

Khrystyna — Wed, 20 Aug 2025 13:30:21 +0000

Today, merchants are selling on multiple sales channels to attract new customers, as the competition is fiercer than ever. To stay ahead, they rely on eCommerce SaaS tools to automate key business functions and streamline operations. However, behind that seamless experience lies one of the biggest technical challenges for SaaS developers: integrating with multiple eCommerce APIs.

The more platforms your eCommerce app supports, the greater your chances of capturing a larger share of the market. But with so many APIs available, which ones should your SaaS prioritize?

In this article, we’ve compiled a list of the most in-demand eCommerce APIs based on integration trends among our clients. Use this as your guide to better understand current market demand and decide which integrations to focus on first.

Let’s dive in.

What is an eCommerce API?

An eCommerce API (Application Programming Interface) is a bridge that enables your SaaS solution to connect with shopping systems and marketplaces like Shopify or Amazon. APIs allow you to retrieve, add, update and sync store data like products, orders, customers, categories, etc.

Each API has its own specifics, different data structures, and limitations that demand proper investigation before integration development. That’s why many SaaS companies rely on unified API integration strategies to simplify the connections and scale faster.

Top 13 Popular eCommerce APIs SaaS Usually Integrate With

Below is the list of popular eCommerce APIs, their specifics and integration difficulty ratings. The rating is based on our devs real experience working with each eCommerce API (where 1 = very easy, 10 = very difficult).

1) Shopify API

Shopify has recently moved from REST API to GraphQL API, so apps that want to integrate with this platform should deal with this new type of API.

Active stores: 6M.

Countries: United States, United Kingdom, Australia, Germany, Canada.

💡Integration difficulties: 6/10

2) WooCommerce REST API

WooCommerce REST API enables to access and manage WooCommerce (Wordpress) store data via REST architecture and JSON format. It supports Basic Auth (through API keys) and OAuth.

Active stores: 6M.

Countries: United States, United Kingdom, India, Germany, France.

💡Integration difficulties: 3/10

3) eBay API

eBay provides a set of APIs (Trading API, Inventory API, Order API, Fulfillment API) to work and manage eBay store data. It supports OAuth 2 authentication and has detailed documentation, as well as rate limits.

Active sellers: 18M.

Countries: United States, United Kingdom, Germany, China, Australia, Italy.

💡Integration difficulties: 7/10

4) BigCommerce API

Its API is based on the REST architecture and JSON format and also a GraphQL Storefront API designed for headless commerce. It supports OAuth 2.0, offers clear documentation, and includes webhooks for real-time synchronization.

Active stores: 40K.

Countries: United States, United Kingdom, Australia, Canada, Brazil.

💡Integration difficulties: 4/10

5) Etsy API

It uses REST architecture with JSON and supports OAuth 2.0 for authentication. A key difference compared to other APIs is its strong focus on unique, handmade, and vintage items, which means the data structure and workflows often differ from standard eCommerce platforms.

Active sellers: 5M.

Countries: United States, United Kingdom, Canada, Germany, Australia.

💡Integration difficulties: 6/10

Read an article "Webhooks vs Polling: Which is Better for Your eCommerce SaaS"

6) Magento 2 API / Magento (Adobe Commerce) API

Magento (now Adobe Commerce) offers both REST and GraphQL API. While the API is powerful and flexible, developers often face issues with performance, inconsistent endpoints, and version differences across stores.

Active stores: 100K.

Countries: United States, United Kingdom, Netherlands, Germany, Italy.

💡Integration difficulties: 4/10

7) Bol.com API

Bol.com is one of the largest online marketplaces in the Netherlands and Belgium, and its API is designed to let sellers and integrators manage product listings, offers, orders, and shipments. The API is REST-based, uses JSON, and requires OAuth 2.0 authentication.

Active sellers: 46K.

Countries: Netherlands, United States, Belgium, United Kingdom, Germany.

💡Integration difficulties: 7/10

8) PrestaShop API

PrestaShop provides a REST API, uses XML or JSON and relies on a key-based authentication system. As with WooCommerce, PrestaShop is open-source and self-hosted, which means every store may run a different version or use custom modules that affect the API’s behavior.

Active stores: 200K.

Countries: United States, France, Spain, Poland, Italy.

💡Integration difficulties: 3/10

9) Demandware (Salesforce Commerce Cloud) API

Salesforce Commerce Cloud, formerly Demandware, offers a set of APIs (including OCAPI – Open Commerce API, and SCAPI – Salesforce Commerce API) to access and manage storefront data. Unlike open-source platforms, SCAPI is part of a fully managed SaaS solution, which ensures stability and enterprise-grade scalability.

However, integration is more complex due to strict authentication, permissions, and multi-tenant architecture, and often requires certification or partnership with Salesforce. Documentation is comprehensive, but the learning curve is higher compared to most other APIs.

Active stores: 11K.

Countries: United States, United Kingdom, France, Germany, Indonesia.

💡Integration difficulties: 7/10

10) Lightspeed eCommerce API

Lightspeed provides a REST API t, uses OAuth 2.0 authentication and returns data in JSON format. A notable characteristic is that Lightspeed supports multi-store and omnichannel setups (eCommerce + POS), which makes it appealing for SaaS tools targeting retailers who operate both online and offline.

However, developers often face rate limits and certain endpoint restrictions, which can complicate large-scale synchronization.

Active stores: 12K.

Countries: Netherlands, United States, Canada, Belgium, Germany.

💡Integration difficulties: 6/10

11) Shopware API

Shopware offers both REST and GraphQL APIs, uses OAuth 2.0 authentication and provides webhooks for real-time updates. Unlike SaaS solutions such as Shopify, Shopware can be deployed in different environments (cloud or self-hosted), which means integrations may vary depending on the version and hosting setup.

While the API is modern and feature-rich, developers often encounter challenges with version fragmentation and custom extensions that affect stability.

Active stores: 21K.

Countries: Germany, United States, Switzerland, Austria, Netherlands.

💡Integration difficulties: 3/10

12) Walmart Marketplace API

It is REST-based, uses JSON, and requires OAuth 2.0 authentication. A distinctive aspect compared to other APIs is Walmart’s strict onboarding and approval process, along with compliance requirements for product data and fulfillment standards. The API also includes features for Walmart Fulfillment Services (WFS), making it attractive for SaaS solutions focused on logistics and order management.

However, integration can be challenging due to complex authentication, rate limits, and mandatory compliance checks.

Active sellers: 151K.

Countries: United States, Mexico, Canada, Chile, China.

💡Integration difficulties: 8/10

13) Amazon SP API (Selling Partner API)

Amazon’s SP-API is a suite of REST endpoints covering listings, catalog, orders, reports/feeds, notifications, and FBA (inbound/outbound) for both Seller and (separately) Vendor programs. It uses OAuth 2.0 (Login with Amazon) plus AWS SigV4 signing, strict scopes/roles, and Restricted Data Tokens (RDT) for PII access. Powerful and comprehensive, but the security model, onboarding, and compliance (PII, data retention) add notable complexity.

Active sellers: 2M.

Countries: United States, Japan, Germany, India, United Kingdom.

💡Integration difficulties: 8/10

API2Cart: Unified eCommerce API Integration Solution

Integrating your eCommerce SaaS with multiple shopping platforms and marketplace is no small feat. Each platform like Shopify, Magento, WooCommerce, Amazon, and others comes with its own API structure, data formats, and maintenance challenges. Building and supporting these integrations in-house quickly drains resources and slows down your growth.

That’s where a unified eCommerce API like API2Cart comes in. With just one integration, your application gains seamless access to 60+ shopping carts and marketplaces. This not only cuts your development time by over 80% but also drastically reduces ongoing maintenance efforts.

Whether you're building a multichannel inventory system, shipping automation tool, order management solution, or any other SaaS for online retailers, API2Cart makes platform connectivity simple, reliable, and scalable.

It provides 100+ unified API methods to get, add, update and sync store data like orders, products, customers, shipment, categories and many other valuable info.

Start your free 14-day trial and see how simple eCommerce API integration can be.

Bridge Integration vs Native API Integration with eCommerce Platforms

Khrystyna — Thu, 31 Jul 2025 09:51:22 +0000

When it comes to developing SaaS products for online stores, one of the first important considerations is the integration with eCommerce platforms. Different approaches exist regarding how to do the integration. Certain companies go for native API integration with eCommerce platforms. Others, for faster data transfer, opt for bridge integration.

There is no definitive “right” or “wrong” approach, each one simply solves a different need. Understanding when a direct API connection is worth it versus when bridge integration is a better fit will greatly influence your scaling capabilities, as well as the agility with which your product processes data from numerous platforms.

In this article, we will cover both of these approaches, explain how they differ, and support your SaaS solution in selecting the one that aligns with your business goals.

The Limitations of Native APIs

Native eCommerce APIs are the first thing developers look at when building an integration. They are authoritative, often well-supported, documented, and maintained by the platform. However, they also come with certain limitations:

Multiple Requests for One Operation

For example, you have a SaaS product and one of the features is to fetch complete order details such as order totals, customers, products, and shipping. Native API integration with eCommerce platforms typically requires multiple requests rather than a single call to perform that action. This means one logical operation for your SaaS product turns into three or more requests at the platform level. This would add unnecessary load to the store’s server as the platform is required to process the numerous API calls, execute its business logic, and fetch the data. In contrast, bridge integration directly fetches raw data and externally processes the data, thereby reducing the load on the store and speeding up the whole process.

Rate Limits and Performance Bottlenecks

Most native APIs enforce rate limits to protect the platform’s infrastructure. While this is understandable, it creates bottlenecks for SaaS applications that need to sync large datasets or perform frequent updates. A marketing automation tool fetching customer lists or an inventory sync service processing thousands of SKUs may quickly hit those limits.

API Specifics

Another case can be illustrated with Magento's inventory endpoint. This endpoint requires SKU as an identifier in place of product ID. If the SKU has special characters, poorly configured servers can fail to process the request, leading to integration problems. Bridge integration does not face this issue because it bypasses API constraints and directly pulls data from the database.

Example: Getting Product Data from Magento 2 API

When a SaaS product chooses a native API integration with eCommerce platforms it needs to perform 153 separate API calls in order to retrieve a full product record from the store.

When multiplied by hundreds or thousands of products, this quickly impacts performance and server load.

How Bridge Integration Works

A bridge integration acts as a single access point for multiple platforms. Rather than interacting with each native API individually, your application connects to the bridge which:

Aggregates and normalizes data: The bridge takes care of converting different API responses into one unified structure.
Executes multi-queries: Instead of several native requests, the bridge uses one or two optimized calls to fetch everything in one or two requests.
Provides extended data access: The bridge is not constrained by what is available through the native API, and, therefore, can fetch extra fields or relevant information.

Example: Product Retrieval via Bridge

Using bridge integration with the eCommerce platform you make two requests to get product info from Magento 2 platform.

It returns the data in a single, normalized JSON object containing order, customer, and product data.

Performance Comparison

We ran tests on retrieving full product details using both methods:

Result: Bridge integrations are up to 10–30x faster for complex operations. The more elements you try to extract, the greater the advantage of bridge integration.

When to Use Each Approach

Native API integration: Suitable for early-stage or single-platform apps where performance is not the top priority.
Bridge integration: Best for SaaS products that need to support multiple platforms, handle large data volumes, and less complicated integration.

API2Cart: eCommerce Integration Solution

API2Cart provides a unified API to connect SaaS apps with 60+ popular eCommerce platforms and marketplaces. Unlike traditional native API integrations, it allows to integrate with eCommerce platforms via bridge connection.

API2Cart Connection Bridge enables connecting stores built on platforms like Magento, WooCommerce, PrestaShop, and Shopware without relying on their native APIs. It works directly with the store’s database, which provides:

High speed – queries are executed directly, bypassing the platform’s entire codebase.
Low server load – all data is processed on API2Cart’s side.
Flexibility – new methods can be added without updating the bridge itself.
Extended data access – including data not available through standard platform APIs.

The bridge is fully secured using unique signatures and encryption. It can be installed manually, automatically via API, or through a plugin, making store connection quick and simple.

This enables SaaS developers to concentrate on creating product features, rather than optimizing data retrieval systems or contending with platform-specific API limitations.

Contact us if you want to know more about eCommerce API integration via API2Cart. We provide a 14-day trial, so you can test our functionality to see how your SaaS can solve your business needs.

Universal API for eCommerce SaaS: Why It Matters in 2025

Khrystyna — Tue, 22 Jul 2025 13:36:32 +0000

For eCommerce SaaS companies, developing integrations with multiple shopping platforms is a challenging and resource-heavy task. Each platform has its own API logic, data structure, and frequent version updates. As a result, managing and maintaining multiple separate integrations becomes time-consuming and expensive.

That’s why having a unified and scalable way to connect with various eCommerce platforms and marketplaces is essential. A universal API provides exactly that — a single integration point that simplifies and accelerates the development process.

In this article, we’ll explore what a universal API is, how it works, and why it’s a game-changer for eCommerce SaaS providers looking to scale efficiently.

What is a Universal API for eCommerce?

Universal API (also known as a unified API) is a type of API that allows eCommerce SaaS to integrate with multiple shopping platforms and marketplaces at once. Instead of dealing with different data formats and API specifics of eCommerce platforms, developers can use one standard endpoint.

Examples of How Platform-Specific APIs Differ

As we previously mentioned, each eCommerce platform (e.g., Shopify, Magento, WooCommerce) has its own unique API structure, which makes integration development more complex. For example:

Shopify has recently shifted to GraphQL API which can complicate the integration process for developers who are used to working only with traditional REST APIs.
Magento uses an EAV (Entity-Attribute-Value) database model with over 40 tables for products and categories, making integration more complex. This complexity also leads to slower performance due to the complexity of SQL queries. Another issue arises in the import process. Magento often requires additional steps during validation and can lead to errors during import.
Requests to WooCommerce REST API one way or another involve downloading the WP/WC PHP code modules. This leads to an increased store load when retrieving a huge amount of data if the store server is not powerful enough. This results in slow work or total store unavailability.

These are just a few peculiarities of how eCommerce APIs work and how they provide access to store data. Without a universal API solution integration with eCommerce platforms becomes a real headache.

Key Benefits of Using a Universal API for SaaS

Using a universal API brings significant advantages for eCommerce SaaS or apps that need to integrate with multiple shopping platforms and marketplaces. Here are the key benefits:

Faster Integration with Multiple Platforms. With a universal API, SaaS developers can link to a wide range of eCommerce platforms using just one integration. This streamlines the process for adding new platforms, giving teams a quicker road to launch.
Reduced Development and Maintenance Costs. Teams can work with a single, cohesive integration rather than juggling different ones for every platform. This streamlines the engineering effort and cuts down the overhead of accommodating platform-specific updates or shifting API requirements.
Improved Scalability and Flexibility. Once a SaaS company begins to expand, a universal API allows onboarding additional platforms without the usual headaches. Rather than pouring resources into separate development efforts for every new eCommerce platform, the API scales with your product needs.
Simplified Data Synchronization. No matter which shopping platform you integrate with, using a universal API you get a consistent data model across platforms. Synchronization of products, orders, customers, and inventory becomes straightforward. The unified API takes on the heavy lifting, so your software or app can interact with uniform data without dealing with the messy specifics of each platform.

Use Cases of eCommerce SaaS that Can Benefit from Universal API

There are a lot of SaaS that work in the eCommerce industry and need to connect to multiple sales channels such as shopping platforms or marketplaces. Below are some of them that need to connect to as many eCommerce platforms as possible.

1. Multi-channel software
These systems allow retailers to manage sales on various platforms like Amazon, eBay, Shopify, and WooCommerce using one single interface. To sync listings, stock levels, and order details, multi-channel solutions need to connect with a wide array of marketplaces and platforms.

2. PIM systems
PIM software helps businesses manage and distribute product data across multiple sales channels. For them to deliver precise and uniform product info, they need seamless integrations with numerous shopping carts and marketplace that can be easily implemented through universal API.

3. Price optimization software
This kind of SaaS monitors competitors’ prices across channels and adjusts pricing dynamically to stay competitive. To be effective, it needs to gather product and pricing info from a wide range of platforms.

4. Order and inventory management software
These systems help merchants avoid overselling and stockouts by syncing orders and inventory from every sales channel they use. To function properly, they must continuously pull and push data across multiple platforms.

5. Shipping tools
Shipping software needs an integration with multiple shopping platforms to provide the features such as automatic label generation, rate calculation, and tracking across carriers and sales channels.

How API2Cart Solves Integration Challenges with Its Universal API

API2Cart provides a universal API for eCommerce SaaS to connect their software or apps with 60+ shopping platforms and marketplaces. It is built on REST API and provides 100+ unified API methods to get, add, update and sync store data like orders, products, customers, categories, etc.

Here is more detailed on how API2Cart unified API works on the example of order.list method:

To get the list of orders you need to send order.list API request to API2Cart.
API2Cart transforms the unified API call into the native one and sends a native API request to Shopify, WooCommerce and Magento (or any other eCommerce platform).
It receives a native API response from the previously mentioned platforms and transforms the native API response into the unified API response from API2Cart with the list of orders from Shopify, WooCommerce and Magento.

Using API2Cart you avoid all the challenges of developing an integration with eCommerce platforms. Moreover, it allows you to launch integrations faster, reduce maintenance costs, and focus on delivering core product value instead of chasing API updates.

Start a free 14-day trial and see in action how easy it is to connect to multiple shopping platforms and marketplaces via API2Cart universal API.

Webhooks vs Polling: Which is Better for Your eCommerce SaaS

Khrystyna — Thu, 10 Jul 2025 12:24:33 +0000

For eCommerce SaaS providers, selecting an efficient method for accessing store data can make or break your business. Should you go with periodic polling or webhooks? In this article, we’ll explore the key factors to consider when deciding between these two options, including store load, resource costs, and system performance.

Planning Your eCommerce Integration Strategy

As a developer of eCommerce SaaS solutions, such as inventory management software, multi-channel systems, logistics platforms, or other solutions for retailers, you're likely familiar with the challenges of integrating your systems with various eCommerce platforms. One of your software’s most critical features is how it interacts with the store’s data. Whether through webhooks or periodic polling, your choice may determine the efficiency, performance, and scalability of your system.

Depending on the case, you will need to determine if your SaaS requires real-time updates or efficient batch data processing. Let us explore both methods, their strengths, and weaknesses. This will enable you to make more informed decisions while designing your system.

What Are Webhooks and When Are They Useful?

Webhooks offer an effective method for communication between different systems in real-time. Instead of waiting for one system to query another for updates, webhooks enable one system to push information to another automatically upon the occurrence of certain pre-defined events, like an order or inventory update.

Webhooks are ideal for use cases requiring instant data synchronization. However, maintaining them with heavy concurrent usage can be problematic.

How it works:

An event in the source system initiates the webhook trigger.
It sends data (payload) to a specified URL on the receiving system.
The target system processes this information immediately, ensuring real-time updates.

Use Case for Small to Medium Stores

Webhooks are ideal for small to medium-sized eCommerce stores experiencing low to moderate traffic. Here’s why:

Immediate updates: Small stores tend to need fast responses to consumer actions like purchasing or restocking. Webhooks take care of these changes without constant checking.
Efficiency: With fewer orders and less frequent data updates, webhooks prevent the need for repeated requests, making them more efficient for stores with low traffic volume.
Cost-effective: With webhooks, there is no need to pay for API calls or polling since data is only sent during event-triggered data transfers. This helps in keeping operational costs low.

For example, an inventory management system can use webhooks to instantly update stock levels whenever a customer places an order. This ensures accuracy without overloading the system, making webhooks the most effective and scalable solution for smaller shops.

What Is Periodic Polling and When Is It Better?

Periodic polling is the process of regularly fetching data from an eCommerce platform at set intervals (such as every couple of minutes or hours) instead of waiting for real-time updates. This approach involves your system continuously checking for changes such as new orders or updated inventory.

How It Works:

Your system sends a request to the eCommerce platform at scheduled intervals.
The platform responds with the latest data, and your system processes it accordingly.
This cycle repeats periodically, keeping the system accurate and up to date.

Use Case for Large Stores

For large eCommerce stores that handle a significant number of transactions and regularly update data, scheduled polling is usually the most beneficial. Here’s why:

Handling High Traffic: With thousands of orders and inventory changes taking place frequently, periodic polling helps you control and manage system load by allowing you to set intervals for data fetching. This avoids overwhelming the system with an excessive number of incoming webhooks.
Scalability: For larger stores, polling typically scales better because it can be set to look for updates at specific intervals, conserving both server resources and network bandwidth. This is advantageous when processing large datasets that do not need immediate synchronization.
Control and Reliability: For stores with complex product catalogs or high volumes of transactions, polling provides more control. You can adjust the frequency of requests based on the store’s needs and the type of data being processed, ensuring that the system stays responsive and reliable.

For example, a logistics system can check an eCommerce platform every half an hour to update shipment statuses and orders across various channels. This approach allows the system to remain current and up-to-date without overwhelming the system with continuous real-time alerts.

Key Factors in Choosing Between Webhooks and Periodic Polling

When deciding between webhooks and periodic polling, there are several key factors to consider, including store load, resource costs, and system performance.

In short, choose webhooks for smaller, high-priority events where real-time updates are needed, and opt for periodic polling when managing large volumes of data and needing more control over the frequency of updates.

How to Effectively Combine Webhooks and Periodic Polling for Maximum Results

To gain the benefits of each approach, you can combine webhooks and periodic polling into one hybrid integration method. This makes it possible to optimize performance and system load while keeping updates as seamless as possible based on your clients’ store requirements.

Hybrid Approach: Webhooks for Key Events and Polling for Updates

Webhooks for Critical Events: For events that require immediate action like order placement, payment confirmation, or customer signup, use webhooks. In these cases, accuracy in real-time processing is critical for an optimal outcome. Such a method enhances overall experience and eliminates user-facing delays.
Periodic Polling for Batch Updates: For processes like report generation or inventory updates where immediate action is not highly critical, periodic polling works best. Polling allows for fetching of larger datasets at specified intervals ensuring systematic operational efficiency without constant request overload.

Best Practices for Designing Flexible Systems

Dynamic Switching: Design your system to switch between methods based on current load. For example, during low traffic, prioritize webhooks for real-time updates, and during high traffic, switch to polling for less critical updates to avoid server strain.
Set Priorities for Events: It is important to establish which events need instant updates through webhooks and which ones can be addressed through periodic polling. This maintains critical workflows while streamlining system efficiency.
Monitoring and Scaling: Consistently evaluate how your system operates. Modify polling frequency or adjust webhook triggers based on the traffic load and data modification rate to ensure utmost efficiency.

A well-designed hybrid approach not only optimizes performance but also gives you the flexibility to adapt to different traffic patterns and changing business needs.

API2Cart: as a Unified API Integration Solution for eCommerce SaaS

In case you provide eCommerce SaaS and need to integrate with multiple eCommerce platforms and marketplace, then you can use API2Cart that can help you with that.

It provides a unified API to connect your software or app with 60+ shopping platforms and marketplaces such as Shopify, WooCommerce, Magento, Amazon and many other platforms. Using just one API connector you can get, add, update and sync store data like orders, products, customers, shipments, etc.

API2Cart also supports webhooks for main events that occur in stores. So, you can use API requests or webhooks based on your business needs.

Each API request can handle 100 to 250 elements (e.g., orders, products, etc.), depending on the complexity and type of data being fetched.

While 1 webhook = 1 element (e.g., a single order update or a product change).

This means that for every webhook, you only get one piece of data.

If you want to learn more about API2Cart functionality and how it can help you solve your business needs, just contact us. Or you can start a free 14-day trial to see how it works in action.