API2Cart helps B2B software providers connect their applications with leading eCommerce platforms through one unified API. Instead of building and maintaining separate integrations for Shopify, Magento, WooCommerce, BigCommerce, Etsy, eBay, Amazon SP-API, PrestaShop, OpenCart, and many other supported systems, you can work with store data through a single, consistent interface.

With API2Cart, your solution can access and manage key eCommerce data such as products, categories, customers, orders, shipments, inventory, and store information. This makes it easier to launch new integrations faster, reduce maintenance work, and support more merchants without expanding your development workload for every new connection.

The API is available over HTTPS and follows REST principles, so it is straightforward to test, implement, and maintain. Access is available only for authenticated users.

To start using API2Cart, create free account and complete the registration process. After that, you will receive a unique API key in your account dashboard. This key identifies your account, grants access to API functionality, and allows API2Cart to track and control API usage.

Before you can work with store data, you need to add the store connection to your API2Cart account. The connection flow depends on the integration type:

  • API-based integration
  • bridge-based integration

For an API-based integration, you provide authentication credentials issued by the connected eCommerce system, such as client ID, client secret, access token, refresh token, or other access details required for that system's API.

For a bridge-based integration, the connection is established with the help of the Connection Bridge file. This option is used when direct API access is not enough or when the store environment requires a bridge file to communicate with API2Cart.

You can add a store connection manually from your API2Cart account by clicking the “Add store” button, entering the store URL, selecting the integration type, and providing the required credentials or bridge details.

You can also automate the same process through an API request, which is useful when your application needs to connect many stores or provide an in-app onboarding flow for your users. To add a store connection automatically, use the account.cart.add method with the same authentication credentials or bridge details required for the selected integration type.

For testing, you can run API methods in the Interactive Docs, from your account, or with the Postman collection.

Here is a short video guide on how to do it in a few clicks

You can also use API2Cart SDKs and developer recommendations to speed up implementation.

API2Cart works on the back end of your application. Your customers do not need to interact with API2Cart directly. You can build your own onboarding UI where users provide credentials, install a bridge file when required, and complete the connection without leaving your product.

Once the connection is active, your application can start retrieving and managing store data through API2Cart methods. This allows you to focus on your product experience while API2Cart handles the unified integration layer.

For additional guidance, visit the API2Cart FAQ, troubleshooting materials, connection guides, and developer documentation. If you need help choosing the right integration flow, contact the API2Cart team via live chat.